Sap2000入門手冊
Sap2000入門手冊
Sap2000入門手冊
COPYRIGHT
The computer program SAP2000 and all associated documentation are proprietary and copyrighted products. Worldwide rights of ownership rest with Computers and Structures, Inc. Unlicensed use of the program or reproduction of the documentation in any form, without prior written authorization from Computers and Structures, Inc., is explicitly prohibited. Further information and copies of this documentation may be obtained from: Computers and Structures, Inc. 1995 University Avenue Berkeley, California 94704 USA tel: (510) 845-2177 fax: (510) 845-4096 e-mail: info@csiberkeley.com web: www.csiberkeley.com
Copyright Computers and Structures, Inc., 19782002. The CSI Logo is a registered trademark of Computers and Structures, Inc. SAP2000 is a registered trademark of Computers and Structures, Inc. Windows is a registered trademark of Microsoft Corporation AutoCAD is a registered trademark of Autodesk, Inc. FrameWorks Plus is a trademark of Intergraph Corporation
DISCLAIMER
CONSIDERABLE TIME, EFFORT AND EXPENSE HAVE GONE INTO THE DEVELOPMENT AND DOCUMENTATION OF SAP2000. THE PROGRAM HAS BEEN THOROUGHLY TESTED AND USED. IN USING THE PROGRAM, HOWEVER, THE USER ACCEPTS AND UNDERSTANDS THAT NO WARRANTY IS EXPRESSED OR IMPLIED BY THE DEVELOPERS OR THE DISTRIBUTORS ON THE ACCURACY OR THE RELIABILITY OF THE PROGRAM. THE USER MUST EXPLICITLY UNDERSTAND THE ASSUMPTIONS OF THE PROGRAMANDMUST INDEPENDENTLY VERIFY THE RESULTS.
ACKNOWLEDGMENT
Thanks are due to all of the numerous structural engineers, who over the years have given valuable feedback that has contributed toward the enhancement of this product to its current state. Special recognition is due Dr. Edward L. Wilson, Professor Emeritus, University of California at Berkeley, who was responsible for the conception and development of the original SAP series of programs and whose continued originality has produced many unique concepts that have been implemented in this version.
Table of Contents
Chapter I Welcome to SAP2000 1
Chapter II Getting Started 3 Installing SAP2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 If You Are Upgrading... . . . . . . . . . . . . . . . . . . 3 About the Manuals. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Help Us to Help You. . . . . . . . . . . . . . . . . 5 Phone and Fax Support. . . . . . . . . . . . . . . . . . 5 Online Support. . . . . . . . . . . . . . . . . . . . . . . . . 6 Chapter III The Structural Model 7 Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Objects and Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Coordinate Systems and Grids. . . . . . . . . . . . . . . . . . . . . . 10 Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Load Cases. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Analysis Cases. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Design Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Output and Display Definitions . . . . . . . . . . . . . . . . . . . . . 15 Learning More. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chapter IV The Graphical User Interface 17 The SAP2000 Screen . . . . . . . . . . . . . . . . . .17 Main Window. . . . . . . . . . . . . . . . . . .17 Menu Bar . . . . . . . . . . . . . . . . . . 18 Toolbars. . . . . . . . . . . . . . . . . . . 18 Display Windows . . . . . . . . . . . . . . . . . .19 Status Line . . . . . . . . . . . . . . . . . . 20 Using the Mouse . . . . . . . . . . . . . . . . . .20 Viewing Options . . . . . . . . . . . . . . . . . . 21 2-D and 3-D Views . . . . . . . . . . . . . . . . . . 21 Perspective . . . . . . . . . . . . . . . . . . 21 Pan, Zoom, and 3-D Rotate . . . . . . . . . .22 Limits . . . . . . . . . . . . . . . . . . 22 Element View Options . . . . . . . . . . . . 22 Other Options . . . . . . . . . . . . . . . . . . 23 Refreshing the Display Window . . . . . . . . . . . . . . . 23 Basic Operations. . . . . . . . . . . . . . . 23 File Operations. . . . . . . . . . . . . . . 23 Defining Named Entities . . . . . . . . . . . . . . 24 Drawing . . . . . . . . . . . . . . . 25 Drawing Objects . . . . . . . . . . . . . . . 26 Snap Tools . . . . . . . . . . . . . . . 27 Drawing Controls . . . . . . . . . . . . . . . 27 Selecting . . . . . . . . . . . . . . .. . . . . . 28 Selecting Graphically . . . . . . . . . . . . . . . 29 Selecting by Feature . . . . . . . . . . . . . . . 29 Editing . . . . . . . . . . . . . . . 30 Assigning . . . . . . . . . . . . . . . 31 Undo and Redo . . . . . . . . . . . . . . . 31 Analyzing . . . . . . . . . . . . . . . 32 Displaying . . . . . . . . . . . . . . . 33 Graphical Displays . . . . . . . . . . . . . . . 33 Function Plots. . . . . . . . . . . . . . . 34 Tabular Displays. . . . . . . . . . . . . . . 34 Designing . . . . . . . . . . . . . . . 35 Locking and Unlocking . . . . . . . . . . . . . . . 35 Entering Numerical Data . . . . . . . . . . . . .36 Setting Options . . . . . . . . . . . . . . . 36 Getting Help . . . . . . . . . . . . . . . 37
17 SAP2000 . . . . . . . . . . . . . . . 17 . . . . . . . . . . . . . . . 17 . . . . . . . . . . . . . . . 18 . . . . . . . . . . . . . . . 18 . . . . . . . . . . . . . . . 19 . . . . . . . . . . . . . . . 20 . . . . . . . . . . . . . . . 20 . . . . . . . . . . . . . . . 21 . . . . . . . . . . . . . . . 21 . . . . . . . . . . . . . . . 21 . . . . . . . . . . . . . . . 22 . . . . . . . . . . . . . . . 22 . . . . . . . . . . . . . . . 22 . . . . . . . . . . . . . . . 23 . . . . . . . . . . . . . . . 23 . . . . . . . . . . . . . . . 23 . . . . . . . . . . . . . . . 23 . . . . . . . . . . . . . . . 24 . . . . . . . . . . . . . . . 25 . . . . . . . . . . . . . . . 26 . . . . . . . . . . . . . . . 27 . . . . . . . . . . . . . . . 27 . . . . . . . . . . . . . . . 28 . . . . . . . . . . . . . . . 29 . . . . . . . . . . . . . . . 29 . . . . . . . . . . . . . . . 30 . . . . . . . . . . . . . . . 31 . . . . . . . . . . . . . . . 31 . . . . . . . . . . . . . . . 32 . . . . . . . . . . . . . . . 33 . . . . . . . . . . . . . . . 33 . . . . . . . . . . . . . . . 34 . . . . . . . . . . . . . . . 34 . . . . . . . . . . . . . . . 35 . . . . . . . . . . . . . . . 35 . . . . . . . . . . . . . . . 36 . . . . . . . . . . . . . . . 36 . . . . . . . . . . . . . . .. 37
39
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Chapter I
Welcome to SAP2000
SAP2000
SAP2000 SAP 1996SAP2000SAP Microsoft Windows SAP2000SAP2000 PLUSSAP2000 Nonlinear Ritz 6x6
SAP2000 represents the most sophisticated and user-friendly release of the SAP series of computer programs. When initially released in 1996, SAP2000 was the first version of SAP to be completely integrated within Microsoft Windows. It features a powerful graphical user interface unmatched in terms of ease-of-use and productivity.
Creation and modification of the model, execution of the analysis, and checking and optimization of the design are all done through this single interface. Graphical displays of the results, including real-time display of time-history displacements, are easily produced. This program offers a quantum leap forward in the way models are created and modified, and in the way analysis and design are managed. The analytical capabilities are just as powerful, representing the latest research in numerical techniques and solution algorithms. This release is available in three different analytical versions that all share the same graphical user interface: SAP2000, SAP2000 PLUS and SAP2000 Nonlinear. All of these programs feature sophisticated capabilities, such as fast equation solvers, force and displacement loading, non-prismatic frame elements, tension-only braces, highly accurate shell elements, Eigen and Ritz modal analysis, multiple coordinate systems for skewed geometry, many different constraint options, the abil-ity to merge independently defined meshes, a fully-coupled 6-by-6 spring stiffness, and the option to combine or envelope multiple dynamic analyses in the same run.
The SAP2000 PLUS program adds unlimited capacity, bridge-analysis capabilities, a complete range of finite elements, and time-history analysis options. Ground motion effects with multiple base excitations can be included. Harmonic steady-state and power-spectral-density analyses are also available.
SAP2000 PLUS SAP2000 Nonlinear PLUS pushover SAP2000 Microsoft Access Microsoft Excel SAP2000 SAP2000 SAPSOLIDSAPSAPIV PCSAP80SAP90 SAP SAP2000
The SAP2000 Nonlinear version extends the PLUS capabilities by adding a nonlinear link element (gaps, hooks, isolators, dampers, and multi-linear plasticity), a multi-linear plastic hinge for use in frame elements, cable behavior, and geometric nonlinearity. Analysis capabilities include static nonlinear analysis for material and geometric effects, pushover analysis, and staged construction; nonlinear time-history analysis by modal superposition or direct integration; and buckling analysis. All of the above programs feature powerful and completely integrated design for steel, concrete, and aluminum, all available from within the same interface used to create and analyze the model. The design of steel and aluminum frame members features initial member sizing and iterative optimization. The design of concrete frame members includes the calculation of the amount of reinforcing steel required. Members can be grouped for design purposes, and a single mouse click on an element brings up the detailed design calculations. A wide variety of the latest national and international design codes are supported, and more are being added all the time. All SAP2000 data, including model information, analysis results, and design results, can be accessed using a tabular data structure. Tabular data can be edited and displayed in the interface, or exported to a Microsoft Access database file, a Microsoft Excel spreadsheet file, or a simple text file. You can use exported data to create reports or to perform specialized calculations. This same tabular data can be imported into SAP2000, enabling you to generate or modify models outside SAP2000. Import and export capabilities also exist for other popular drafting and design programs. The SAP name has been synonymous with state-of-the-art analytical solutions since the introduction of SAP, SOLIDSAP, and SAP IV thirty years ago, followed by its implementation on the PC with SAP80 and SAP90. To these sophisticated numerical techniques, SAP2000 adds a tremendously easy and complete graphical user interface linked with powerful design capabilities, providing the structural engineer with an analysis and design program unequaled in efficiency and productivity.
Chapter II
Getting Started
SAP2000
SAP2000 is a full-featured program which can be used for the simplest problems or the most complex projects. This chapter will help you get started using the program.
SAP2000
SAP2000
Installing SAP2000
Please follow the installation instructions provided in the separate installation document included in your SAP2000 Package, or ask your system administrator to install the program and give you access to it.
SAP2000
These changes significantly improve the capabilities of the program in a consistent and forward-looking way.
We recommend that you read the rest of this manual to familiarize yourself with the new concepts. Please also see the topic Whats New in the Help facility within the program to learn more about the new and improved features in SAP2000. Whats New SAP2000
SAP2000 SAP2000 SAP2000 SAP2000 SAP2000 SAP2000 SAP2000 Adobe Acrobat PDFSAP2000 SAP2000 SAP2000 SAP2000
Technical Support
Free technical support is available from Computers and Structures, Inc. (CSI) via phone, fax, and e-mail for 90 days after the software is purchased. After 90 days,
technical support is available according to the terms of the Technical Support Agreement, which you may purchase from CSI or your dealer. Please contact CSI or your dealer to inquire about a Technical Support Agreement. If you have questions regarding use of the software, please: Consult the documentation and other printed information included with your product Check the on-line Help facility in the program If you cannot find a solution, then contact us as described below.
StandardPLUSNonlinear >SAP2000
When you call, please be at your computer and have the program manuals at hand.
Online Support
Online support is available by: Sending an e-mail and your model file to support@csiberkeley.com Visiting CSIs web site at http://www.csiberkeley.com to read about frequently asked questions If you send us e-mail, be sure to include all of the information requested above under subtopic Help Us to Help You.
Chapter III
The
SAP2000 SAP2000
Structural Model
SAP2000 analyzes and designs your structure using a model that you define in the graphical user interface. The model consists primarily of the following types of components: Units Objects Groups Coordinate systems and grids Properties Load cases Functions Analysis cases Combinations Design settings Output and display definitions The graphical user interface provides you with many powerful features to create your model. You can even start with a preliminary model, then use the SAP2000 design-optimization feature to refine your model with little effort.
The topics in this chapter describe these components in a little more detail.
Units
SAP2000 works with four basics units: force, length, temperature, and time. The program offers many different compatible sets of force, length and temperature units to choose from, such as Kip, in, F or N, mm, C. Time is always measured in seconds. An important distinction is made between mass and weight. Mass is used only for calculating dynamic inertia and for loads due to ground acceleration. Weight is a force that can be applied like any other force load. Be sure to use force units when specifying weight values, and mass units (force-sec2/length) when specifying mass values. When you start a new model, you will be asked to specify a set of units. These become the base units for the model. Although you may provide input data and view output data in any set of units, these values are always converted to and from the base units of the model. Angular measure always uses the following units: Geometry, such as axis orientation, is always measured in degrees Rotational displacements are always measured in radians Frequency is always measured in cycles/second (Hz)
SAP2000 KipinFNmmC 2/ /
Line objects, of two types: Frame/cable objects: Used to model beams, columns, braces, trusses, and/or cable members. Connecting (two-joint) link objects: Used to model special member behavior such as isolators, dampers, gaps, multi-linear springs, and more. Unlike frame/cable objects, connecting link objects can have zero length. Area objects: Used to model walls, floors, and other thin-walled members, as well as two-dimensional solids (plane stress, plane strain, and axisymmetric solids). Solid objects: Used to model three-dimensional solids. As a general rule, the geometry of the object should correspond to that of the physical member. This simplifies the visualization of the model and helps with the design process. If you have experience using traditional finite element programs, including earlier versions of SAP2000, you are probably used to meshing physical models into smaller finite elements for analysis purposes. Object-based modeling largely eliminates the need for doing this. For users who are new to finite-element modeling, the object-based concept should seem perfectly natural. When you run an analysis, SAP2000 automatically converts your object-based model into an element-based model that is used for analysis. This element-based model is called the analysis model, and You have control over how the meshing is performed, such as the degree of refinement, and how to handle the connections between intersecting objects. You also have the option to manually mesh the model, resulting in a one-to-one correspondence between objects and elements.
/ / SAP2000 SAP2000
Groups
A group is a named collection of objects. It may contain any number of objects of any number of types. Groups have many uses, including: Quick selection of objects for editing and assigning Incremental construction stages
Defining section cuts across the model Grouping objects that are to share the same design Selective output You may define as many groups as you need. Using groups is a powerful way to manage larger models.
Properties
Properties are assigned to each object to determine the structural behavior of that object in the model.
Some properties, such as material and section properties, are named entities that must be defined before assigning them to objects. For example, your model may have: A material property called CONCRETE A rectangular frame section property called RECT, and a circular section called CIRC, both using material CONCRETE An area section property called SLAB that also uses material CONCRETE. If you assign frame section property RECT to a frame object, any changes to the definition of section RECT or material CONCRETE will automatically apply to that object. A named property has no effect on the model unless it is assigned to an object. Other properties, such as frame end releases or joint support conditions, are assigned directly to objects. These properties can only be changed by making another assignment of that same property to the object; they are not named entities and they do not exist independently of the objects.
Load Cases
Loads represent actions upon the structure, such as force, pressure, support displacement, thermal effects, ground acceleration, and others. A spatial distribution of loads upon the structure is called a load case. You can define as many named load cases as you like. Typically you would have separate load cases for dead load, live load, wind load, snow load, thermal load, and so on. Loads that need to vary independently, either for design purposes or because of how they are applied to the structure, should be defined as separate load cases. After defining a load case name, you must assign specific load values to the objects as part of that load case. The load values you assign to an object specify the type of load (e.g., force, displacement, temperature), its magnitude, and direction (if applicable.) Different loads can be assigned to different objects as part of a single load case. Each object can be subjected to multiple load cases. For example, suppose you have defined load cases named WIND, SNOW, and SUN15. For load case WIND, you might assign different windward and leeward pressure loads to vertical objects on opposite sides of the structure. For load case SNOW, you might assign downward forces only to objects on the roof of the structure. For load case SUN15, you might assign different temperature values to differ-ent objects in the structure corresponding to the effects of sun on the structure at 3:00 P.M. in the afternoon.
SAP2000 also has three built-in acceleration loads which represent unit ground translational acceleration in each of the global directions. These are automatically assigned to all objects in the structure that have mass. In order to calculate any response of the structure due to the load cases, you must define and run analysis cases (described below) which specify how the load cases are to be applied (e.g., statically, dynamically, etc.) and how the structure is to be analyzed (e.g., linearly, nonlinearly, etc.) The same load case can be applied differently in different analysis cases.
SAP2000
Functions
You define functions to describe how load varies as a function of period or time. They are only needed for certain types of analysis; they are not used for static analysis. A function is a series of digitized abscissa-ordinate data pairs. There are two types of functions: Response-spectrum functions: Pseudo-spectral acceleration vs. period for use in response-spectrum analysis Time-history functions: Loading magnitude vs. time for use in time-history analysis. You may define as many named functions as you need. They are not assigned to objects, but are used in the definition of analysis cases.
Analysis Cases
An analysis case defines how loads are to be applied to the structure, and how the structural response is to be calculated. There are many different types of analysis cases. Most broadly, analyses are classified as linear or nonlinear, depending upon how the structure responds to the loading. The results of linear analyses may be superposed, i.e., added together after analysis. The available types of linear analysis are: Static: The most common type of analysis. Loads are applied without dynamical effects.
Modal Analysis: Calculation of dynamic modes of the structure by eigenvector or Ritz-vector method. Loads are not actually applied, although they can be used to generate Ritz vectors. Response-spectrum Analysis: Statistical calculation of the response due to acceleration loads. Requires response-spectrum functions. Time-history Analysis: Time-varying loads are applied. Requires time-history functions. The solution may be by modal superposition or direct integration methods. Buckling Analysis: Calculation of buckling modes under the application of loads. Moving Load Analysis: Calculation of the most severe response due to vehicle loads moving along lanes on the structure. Uses defined vehicle loads and defined lanes rather than the load cases used by other analysis types. The results of nonlinear analyses should not normally be superposed. Instead, all loads acting together on the structure should be combined directly within the analysis cases. Nonlinear analysis cases may be chained together to represent complex loading sequences. The available types of nonlinear analyses are: Nonlinear Static: Loads are applied without dynamical effects. May be used for pushover analysis and staged construction. Nonlinear Time-history Analysis: Time-varying loads are applied. Requires time-history functions. The solution may be by modal superposition or direct integration methods. You may define as many named analysis cases of any type that you wish. When you analyze the model, you may select which cases are to be run. You may also selectively delete results for any analysis case. Analysis results, when available, can be considered to be part of the model. They are needed in order to perform design.
SAP2000 combo
Combinations
A SAP2000 combination, also called a combo, is a named combination of the results from one or more analysis cases and/or other combinations. When a combination is defined, it applies to the results for every object in the model. There are four types of combinations:
Additive type: Results from the included analysis cases and/or combos are added. Absolute type: The absolute values of the results from the included analysis cases and/or combos are added. SRSS type: The square root of the sum of the squares of the results from the included analysis cases and/or combos is computed. Envelope type: Results from the included analysis cases and/or combos are enveloped to find the maximum and minimum values. Except for the envelope type, combinations should usually be applied only to linear analysis cases, since nonlinear results are not generally superposable. Design is always based on combinations, not directly on analysis cases. You may create a combination that contains just a single analysis case. Each design algorithm creates it own default combinations. You may add your own for design or other purposes.
SRSS
Design Settings
The design features of the program can be used on frame/cable objects whose section properties use materials of concrete, steel, or aluminum. There are several settings you can make that affect the design of a particular model: The specific design code to be used for each type of material, e.g., AISC-LRFD93 for steel, EUROCODE 2-1992 for concrete, and AA-ASD 2000 for aluminum Preference settings of how these codes should be applied to your model Combinations for which the design should be checked Groups of objects that should share the same design For each object, optional overwrite values that specify coefficients and parameters used in the design-code formulas that you wish to change from the default values chosen by the program For steel and aluminum design, the program can automatically select an optimum section from a list you define. You can also manually change the section during the design process. As a result, each frame/cable object can have two different section properties associated with it: An analysis section used in the previous analysis, and
A design section resulting from the current design. The design section becomes the analysis section for the next analysis, and the iterative analysis and design cycle should be continued until the two sections become the same. Design results for the design section, when available, as well as all of the settings described above, can be considered to be part of the model.
SAP2000
Learning More
Each SAP2000 model is like a living thing that grows and changes as you develop it, run analyses, perform design, and review results. This chapter presented some of the basic features that make up a structural model, but to really understand the model you must also learn how to work with it. The next chapter describes how to use the SAP2000 interface to do just that. Basic concepts and techniques will be presented. To put all this information together, we recommend that you read and perform the tutorial example given in the SAP2000 Introductory Tutorial manual, included in this volume.
SAP2000 SAP2000
You can learn more about the details of using the graphical user interface by using the Help facility within the interface itself. Information about the SAP2000 model is also available in the Help facility.
SAP2000
Chapter IV
The
SAP2000 GUI The Structural Model SAP2000
SAP2000
Windows
Main Window
The main window contains the entire graphical user interface. This window may be moved, resized, maximized, minimized, or closed using standard Windows operations. The main title bar, at the top of the main window, gives the program name and the name of the model file.
Menu Bar
The menus on the Menu Bar contain almost all of the operations that you can perform with SAP2000. These operations are called menu commands, or simply commands. Each menu corresponds to a basic type of operation that you can perform. These will be described later in this chapter. Throughout this manual, and in the SAP200 help facility, menu commands are indicated as Menu > Command, where Menu is the menu name, and Command is a item you can select from the menu. In some cases, commands are on sub-menus of the main menu, in which case they are indicated as Menu > Sub-menu > Command.
SAP2000
SAP2000 > > >
Toolbars
The buttons on the toolbars provide quick access to many commonly used operations. If you hold your mouse cursor over one of these buttons, a tool tip will pop up showing you the function of the button, as shown below:
Most buttons correspond to menu commands. If a menu command has a corresponding button, it will be displayed next to the command on the menu, as shown in the figure below. This allows you to quickly learn which buttons to use for operations that you perform frequently.
You can move the toolbars around to any of the four sides of the main window, or have them floating over the display windows. You can also control which toolbars are present and which buttons they contain, and create your own custom toolbars of frequently used operations.
Display Windows
Display windows show the geometry of the model, and may also include properties,loading, analysis or design results. You may have from one to four display windows present at any time.
Each window may have its own view orientation, type of display, and display options. For example, the undeformed shape could be displayed in one window, applied loads in another, an animated deformed shape in a third, and design stress ratios in the fourth window. Alternatively, you could have four different views of the undeformed shape or other type of display: a plan view, two elevations, and a perspective view. Only one display window is active at a time. Viewing and display operations only affect the current active window. You may make any display window active by clicking on its title bar or within the window.
Status Line
The status line contains the following items: Status information about what the program is currently doing, or the number of objects currently selected The coordinates of the mouse cursor A drop down box to show or change the current units A drop down box to show or change the current coordinate system Scrolling controls when displaying analysis results for multi-step cases Animation controls when displaying deformed shapes
Left mouse button: depending on which mode the program is in, this button is used to Draw new objects, Select existing objects, Perform graphical operations such as pan, zoom, and rotate. Right mouse button: When clicked on an object, this button brings up information about the object, When clicked on the background, this button brings up a menu of operations you can choose. Elsewhere in the interface, the mouse buttons have standard Windows functions. This includes when on the title bar, the status line, and in all forms (dialog boxes.)
Windows
Viewing Options
You may set various view options for the active Display Window to control how the structure appears in that window. These options are available in the View menu. View options are set independently for each Display Window.
Perspective
A 3-D view may be toggled between a perspective view and an orthographic projection. The perspective view is usually better for visualizing the third, out-ofplane, dimension. If perspective is turned on for a 2-D view, the view becomes 3-D until perspective is turned off again.
You may set the perspective aperture angle which defines how close you are to the structure. The larger the angle, the closer you are, and the more distorted the structure may appear.
XYZ
Limits
You may set upper and lower X, Y, and Z coordinate limits that restrict the portion of the structure that is visible in a Display Window. Zooming and panning only apply to the part of the structure within these limits.
Other Options
You may turn gridlines and the global axes on and off. You may save view parameters under a name of your choice, and recall them later to apply to any Display Window.
>
SAP2000 SAP2000
Basic Operations
It will be helpful for you to understand the basic types of operations that you can perform with SAP2000. The program responds differently to mouse actions in the display windows depending upon the type of operation you are performing. The remainder of this chapter provides an overview of SAP2000 operations. Details on how to actually perform these operations are given in the quick tutorial in the next manual, and in the on-line Help facility of the graphical user interface itself.
SAP2000 .SDB
File Operations
File operations are used to start a new model, to bring in an existing model for display or modification, to save the model that you are currently working on, and to produce output. File operations are selected from the File menu. New models can be started from scratch or from pre-defined templates supplied with the program. A model and its results can be saved as a standard SAP2000 binary file (.SDB extension), and opened again later to review results or make further changes. Alternatively, a model and its results can also be exported, in whole or in part, to a text file, a spreadsheet file, or a database file using SAP2000 tabular data format. Models can be imported using SAP2000 tabular data format, whether the data file
(text , spreadsheet, or database) was previously exported from the graphical user interface, or created externally in some other way. Model geometry can be exported to and imported from AutoCAD and other programs that use .DXF file formats. Similar import/export capabilities are available for the FrameWorks Plus CAD program. SAP2000 can also export to and import from steel detailing programs using CIS/2 Step or Steel Detailing Neutral File formats. The model description and the results of analysis and design can be printed in simple tables or produced in custom reports that include graphics, text, and formatting features. The active display window can be printed as graphics or saved in bitmap and enhanced Windows metafile formats. Video files can be created showing animated mode shapes or time-history deflected shapes. Other file operations include defining project information for the particular model; maintaining a detailed log of the project; and a facility for running the analyses of multiple models in batch mode.
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Analysis and response items, such as Analysis cases Combinations Generalized displacements Section cuts Output and display items, such as Named views, for display window settings Named sets, for output and export definition Defining these entities is performed using the Define menu and does not require a prior selection of objects. Object properties, groups, and some of the loading can be assigned to selected objects. Many of these entities can also be defined during the assignment operation from the Assign menu. The remaining entities apply to the model as a whole and are not assigned to objects.
Drawing
Drawing is used primarily to add new objects to the model or to modify objects one-at-a-time. Objects you can draw include points (joints and grounded links), lines (frames, cables, and connecting links), and areas (shells, planes, asolids). You cannot draw solid objects, but must create them by extrusion; see topic Editing below. Joints are automatically created at the ends of line and link objects and at the corners of area and solid objects. Additional joints may be added explicitly. Duplicate joints and objects at the same location are automatically eliminated by the program, except that duplicate link objects are permitted as an option. To draw, you must put the program into Draw Mode by selecting one of the object drawing commands from the Draw menu. While drawing, you can choose various drawing options from a form that floats over the display windows. These include the properties to assign while drawing and drawing controls. You can move or close this form if it is in the way while drawing. Draw Mode and Select Mode are mutually exclusive. To return to Select Mode, use the menu command Draw > Set Select Mode, or perform any selection operation.
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While drawing, you can use the left mouse button to zoom, pan, or rotate, after which the program will return to draw mode.
Drawing Objects
You use the left mouse button to perform drawing operations. You may need to click, double-click, or click-and-drag (hold down the left button while moving the mouse), depending on the drawing operation: Draw Special Joint Click once to draw a joint, or drag a window to draw joints at all enclosed grid intersections. Draw Frame/Cable Click once to draw each end point in a series of objects connected end-to-end, then double click to end the series Quick Frame/Cable Click once on a grid segment to draw an object, or drag a window to draw objects on all enclosed grid segments Quick Draw Braces In a 2-D view, click in a grid space (bay) to draw diagonal frame/cable braces Quick Draw Secondary Beams In a 2-D plan view, click in a grid space (bay) to draw a set of secondary beams (frame objects) Draw Quad Area Click once at the four corner locations to draw a quadrilateral, or double-click at the third corner to draw a triangle Draw Rectangular Area In a 2-D view, click once at two opposite corners to draw the object Quick Draw Area Click in a grid space (bay) to draw an area object, or drag a window to draw objects on all enclosed grid spaces Draw 1 Joint (Grounded) Link Click once to draw a joint, or drag a window to draw joints at all enclosed grid intersections. Draw 2 Joint (Connecting) Link Click once to draw each end point in a series of objects connected end-to-end, then double click to end the series Quick Draw 2 Joint (Connecting) Link Click once on a grid segment to draw an object, or drag a window to draw objects on all enclosed grid segments Reshape objects Click once on an object that you want to reshape, then click and drag the part of an object you want to move. In 3-D views cursor placement is limited to known locations, such as on gridlines and at existing point objects. In 2-D views, cursor placement can be anywhere, since the third (out-of-plane) dimension is known.
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Cursor movements can be controlled by using snap and drawing control tools during drawing and reshaping of objects.
Snap Tools
Snap tools find the closest snap location to your pointer as you move it over your model. The snap tools are a fast and accurate way to draw and edit objects. The snap tools can be turned on and off as you draw. More than one snap tool can also be turned on at the same time giving you a choice of snap locations. Options include snapping to: Point objects and grid intersections Object ends (corners) and midpoints (mid-edges) Object intersections Perpendicular projection to a line object or the edge of an area or solid object Line objects and the edges of area and solid objects Fine grid, and invisible, three-dimensional grid of uniformly-spaced points that you define
H V A L S D H V A L S D
Drawing Controls
In 2-D views, the drawing control tools provide the capability to enforce the placement of a point along specified lines that pass through the last drawn point. Drawing controls include: Constant H The line is drawn parallel to the axis that appears horizontal in the 2-D view Constant V The line is drawn parallel to the axis that appears vertical in the 2-D view Constant A The line is drawn at a constant angle to the axis that appears horizontal in the 2-D view Constant L The line is drawn at a constant length, measured in the 2-D view Constant S The line is drawn at a constant angle and a constant length, measured in the 2-D view Constant D The line is drawn at constant lengths along the axes that appear horizontal and vertical in the 2-D view
You may select the drawing control from the floating form that appears while drawing, or press the corresponding letter key (H, V, A, etc.) on the keyboard. Pressing the space bar on the keyboard cancels the drawing control. Snaps can optionally be used in conjunction with drawing controls. Only the unconstrained component of the selected snap point is used when a control has been selected.
H V A
Selecting
Selecting is used to identify existing objects to which the next operation will apply. SAP2000 uses a noun-verb concept where you first make a selection of objects, and then perform an operation upon them. Operations that require you to make a prior selection include certain Editing, Assignment, Design, Display, and Output operations. To select, you must put the program into Select Mode. Do this by using the menu command Draw > Set Select Mode, or by choosing any command from the Select menu. Draw Mode and Select Mode are mutually exclusive. Any operation except drawing can be performed when the program is in Select Mode. You can select objects graphically or by various features of the objects. Selection operations are cumulative, i.e., each selection operation adds objects to the current set of selected objects, and each deselection operation removes objects from the set. Selected objects are shown graphically in the display windows with dashed lines. The number of selected objects of each type is shown in the status line. It is always a good idea to check the status line when performing selection operations. Once you have finish building up your selection set (the noun), you can perform an operation (the verb) upon it. This then clears the selection, and you are ready to start a new selection for the next operation. Three important selection commands are available from the menu or the toolbar: Select > Select > All selects every object in the model, regardless of what objects are shown in the display windows Select > Get Previous Selection selects the same objects as in the last complete selection operation Select > Clear Selection deselects all objects Other selection (and deselection) operations are described below.
Selecting Graphically
You can select graphically using the left mouse button in a display window. Several types of graphical selection are available: Select by pointer Click on an unselected object to select it, or click on a selected object to deselect it Select by enclosing window Drag a window from left to right to select all objects that are fully enclosed in the window Select by intersecting window Drag a window from right to left to select all objects that are fully or partially enclosed in the window Select by intersecting line Drag a line to select all objects that are intersected by the line Select by 3-D box Click on two points in a 3-D view to select all objects enclosed within a box whose diagonal is defined by the two points and whose sides are parallel to the X, Y, and Z axes. The first three options are available by default and are indicated by the usual pointer cursor. The last two options require that you set the type of selection from the Select menu or the toolbar. These options are indicated by special cursors. After a single selection, the cursor returns to the default pointer/window selection mode. Only objects present in a given display window can be selected graphically. For example, suppose you have hidden point and line objects, and are only displaying area objects in a particular display window. If you select by dragging a window around the entire structure, only area objects will be selected, even if hidden point and line objects actually exist inside the selection window. While selecting, you can use the left mouse button to zoom, pan, or rotate, after which the program will return to select mode.
XYZ
Selecting by Feature
From the Select menu, you may select or deselect objects by their various features, such as: All objects on a particular plane All objects that have a given section or property type All objects that belong to the same group All objects that connect to the same constraint
All objects that have specified labels These selection methods operate independently of the display windows, and affect all objects having the given feature even if it is not being displayed. The use of groups is particularly helpful when making complicated selections. If you expect to select the same set of objects more than once, build up your selection set once and then assign a new group name to the selected objects (see below). After that, you can make the same selection simply by using the group name.
Editing
Editing is used to make changes to the model. Most editing operations work on a prior selection of objects. You can perform the following editing operations, all selected from the Edit menu: Cut or Copy the geometry of selected objects to the Windows clipboard. Geometry information put on the clipboard can be accessed by other programs, such as spreadsheets Paste object geometry from the Windows clipboard into the model. This could have been edited in a spreadsheet program from a previous Cut or Copy Delete selected objects Replicate selected objects in a linear or radial array Move selected objects to a new location Extrude selected objects to create higher dimensional objects: Extrude points to lines Extrude lines to areas Extrude areas to solids. This is the only way to graphically create solid objects Mesh (divide) selected objects into smaller objects of the same type Connect or disconnect selected objects at a common joint Add to the model from a template Interactively edit the model in tabular data format Change labels of objects and other named entities and more
Pasting and adding to the model from a template do not operate on a selection of objects. Interactive table editing and changing labels can work on a selection or the whole model. All other operations require a prior selection to be made.
Assigning
Assignment is used to assign properties and loads to one or more objects that you have just selected. Assignment operations are selected from the Assign menu, including: Assigning properties to joint objects, including restraints, constraints, springs, masses, and local coordinate systems Assigning properties to frame/cable objects, including section properties, end releases, local coordinate systems, end offsets, insertion points, output locations, internal prestressing patterns, cable properties, nonlinear properties, automated meshing parameters, and more Assigning properties to area objects, including section properties, local coordinate systems, area springs and masses, automated meshing parameters, and more Assigning properties to solid objects, including section properties, local coordinate systems, surface springs, automated meshing parameters, and more Assigning properties and local coordinate systems to link objects Assigning loads of many different types to each type of object Assigning pattern values to joints for use in defining temperature and pressure loads Assigning group names to objects, making the objects part of that group Copying assignments from one selected object, and in a separate operation, pasting these assignments onto one or more selected objects of the same type
SAP2000
Undo does not apply to define operations Undo does not apply to interactive table editing Once you save the model, run an analysis, or use interactive table editing, you cannot undo prior operations
Analyzing
After you have created a complete structural model using the operations above, you can analyze the model to determine the resulting displacements, stresses, and reactions due to the loads applied in the analysis cases. Before analyzing, you may set analysis options from the Analyze menu. These options are: Set available degrees of freedom for the analysis, which are primarily used to restrict a model to planar behavior Set whether the model definition and analysis results should be automatically saved in SAP2000 tabular format to an Access database file To run the analysis, use the menu command Analyze > Run. You may select which cases are to be run. Any cases that have already been run do not have to be run again. Any cases that you do not run can be run later. If you choose to run an analysis case that requires results from another case, the prerequisite case will be run first if it hasnt been already. For example, if you run a response-spectrum case, the case that defines the modes used will also be run if needed. Before running the analysis, SAP2000 saves the model. During the analysis, messages from the analysis engine appear in a monitor window. When the analysis is complete, you may review the analysis messages using the scroll bar on the monitor window. Click on the OK button to close the monitor window after you have finished reviewing these messages. These messages are also saved in a file with extension .LOG, which you can view later using the menu command File > Show Input/Output Text Files. No other SAP2000 operations may be performed while the analysis is proceeding and the monitor window is present on the screen. You may, however, run other Windows programs during this time.
Displaying
Graphical Displays
You may select a different type of graphical display for each Display Window. Each window may also have its own view orientation and display options.
Model Definition You may view the model geometry using the menu command Display > Show Undeformed Shape. This displays only the objects and assignments that you have chosen using the command View > Set Display Options. All other assignments to the objects may be viewed using commands Show Load Assigns and Show Misc Assigns in the Display menu.
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When viewing the undeformed shape, with or without assignments, a right click with the mouse on any object brings up an information form showing all the details of geometry, connectivity, assignments, and loads for that object.
Analysis Results Analysis results can be graphically displayed for any case that has been run. These displays include: Deformed shapes Reactions and spring forces for joints Force and moment diagrams for frames, cables, and links Force and moment stress-resultant contour plots for shells Stress contour plots for shells, planes, asolids, and solids Influence-lines for displacements, reactions, spring forces, and frame/cable forces and moments Virtual work plots for all object types
Deformed shapes can be animated using the controls on the status line. Animating the deformed shape sometimes helps to clarify the behavior of the structure.
For analysis cases with multiple results (multiple modes or multiple steps), you can step through the individual results using the scrolling controls on the status line. You also have the option to plot the maximum or minimum over multiple steps. Details of the displayed results can be obtained by clicking on an object with the right mouse button.
pushover
Function Plots
Function plots are graphs of one variable against another. These include: Response-spectrum curves These curves can be generated at any joint in the structure based on the results of a time-history analysis case. Plot-function traces These are general plots of any number of response quantities (displacements, stresses, etc.) against time or against another response quantity. These are available for any time-history or multi-stepped nonlinear static case. Static pushover curve This is a plot of a single displacement measure against the base reaction for multi-stepped, displacement-controlled nonlinear static analysis cases. Function plots are displayed in a special plot window and may be printed. Tables of plotted values may also be printed or saved in a file.
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Tabular Displays
From the Display menu, you can show the model definition, analysis results, and design results as tabular data on screen. You can choose what tables you want to see. If you make a prior selection, only data for the selected objects are displayed. Otherwise results are produced for the whole model. Advanced options exist to control the format of the tables, and to create filters that will only display data that satisfy specified criteria. An example of this would be to display only frame design stress ratios that are above 0.9. Tabular data can also be exported and printed from these on-screen displays, or by using commands available on the File menu.
Designing
Designing is used to check concrete, steel and/or aluminum frame/cable objects with respect to different design-code requirements. Design may be performed after the structure has been analyzed. Most design operations, including display, are available from the Design menu. Steel and aluminum frame objects can have a minimum weight section automatically picked from a set of sections that you have defined. Concrete frame objects can have the area of longitudinal and shear reinforcing steel automatically chosen according to the selected design code. You can interactively design individual members, trying different sections and checking the results. If you manually change a section, or if optimum sections were automatically chosen by the program, you should re-run the analysis and repeat the design process until the analysis and design sections are the same. Graphical displays of stress ratios and design parameters are available. Tabular design information can be obtained for single frame objects by clicking on them with the right mouse button. Alternatively, tabular design information can be displayed from the Display menu and printed or exported from the File menu. If you make a prior selection, only selected objects are displayed, printed, or exported. Otherwise results are produced for the whole model.
Locking and Unlocking After an analysis is performed, the model is automatically locked to prevent any changes that would invalidate the analysis results and subsequent design results that may be obtained. You may also lock the model yourself at any time to prevent further changes to your model, or unlock the model to permit changes. Lock and Unlock are accessed from the Options menu.
When you unlock the model after an analysis, you will be warned that all analysis results will be deleted. If you do not want this to happen, save the model under a different name before unlocking it. Any subsequent changes will then be made to the new model. You are allowed to define analysis cases without unlocking the model. New cases can be added, and cases that have not been run can be modified or deleted with no effect. If you modify or delete a case that has already been run, analysis results for that case and all cases that depend upon it will be deleted.
3500 3.5 / 30000 kip in/ 30000 kip in 9-3() - 93 1000+40100*sin(30) 1000+40 m Shift >
Setting Options
There are many options that you can set to control how the program behaves. These are accessed from the Options menu, and include: Dimensions and tolerances merge, selection, and snap tolerances; font sizes; zoom increment; and others Design codes and their parameters Colors of objects and results for display and printing
Formatting for tabular data How many display windows to show Other display options that affect all display windows Locking and unlocking of the model Aerial view window, which allows for quick pan and zoom And more
Getting Help
To access the SAP2000 Help facility, use the menu command Help > Contents & Index, or press the F1 key at any time. If a form (dialog box) is open, the F1 key will take you directly to information about how to use that form. Otherwise the F1 key simply opens the Help facility, allowing you to: Browse through the many topics using the Table of Contents Use the Index to display an alphabetical list of all Help topics Use the Search feature to find topics that contain specific words From the Help menu you may also access all SAP2000 documentation in Adobe Acrobat .PDF file format, or go to the CSI web site. The menu command Help > About SAP2000 tells you the version of the program you are using, as well as information about your operating system. This information is very useful when contacting CSI for technical support.
Chapter V
SAP2000
All SAP2000 data that can be accessed using the graphical user interface can also be accessed as tabular data, i.e., as data organized in a set of tables with specified table names and column headings. These data include the definition of the model and the results of analysis and design. Tabular data can be used for editing or display in the graphical user interface, for export to and import from other programs, and for generating printed output in a variety of formats.
SAP2000
Model Definition
Model definition data include all components of the structural model (properties, objects, assignments, loads, analysis cases, design settings, etc.), as well as any options you have selected, and named result definitions you have created. Model definition data are always available, whether or not analyses have been run or design has been performed. These tables can be edited, displayed, exported, imported, and printed.
Analysis Results
Design Results
Design results data include the design stresses, stress ratios, effective lengths, optimal sections, area of reinforcing steel, and all other calculated quantities resulting from the design process. These data are only available for objects that have actually been designed. Design results tables can be displayed, exported, and printed, but not edited or imported.
SAP2000 Joint Coordinates Connectivity - Frame/Cable Joint Displacements Element Forces - Frames Concrete Design 1 - Column Summary Data - ACI 318-99 Steel Design 3 Shear Details - AISC-LRFD93 Joint, CoordSys, Z Connectivity - Frame/Cable Frame, JointI, JointJ, Length
SAP2000
Microsoft Excel (during on-screen display only) Microsoft Access (during on-screen display only) You have complete control over how the tables are to be formatted, as described in topic Format Control for Display and Printing. For more information on generating formatted tables, see topics Displaying Tabular Data, Printing Tabular Data and Custom Report Writer.
Microsoft Excel () Microsoft Access () Format Control for Display and Printing Displaying Tabular DataPrinting Tabular DataCustom Report Writer
SAP2000 Display
If you make a selection of objects before display, only the selected objects will be shown in those tables that contain object-specific data. Otherwise the entire model will be used.
While displaying tabular data, you can print the tables directly to your default printer in plain text format. You can also open and view the tables using any of the following programs that are available on your computer: Microsoft Word as rich text format Microsoft Internet Explorer as HTML format The default text editor as plain text Microsoft Excel Microsoft Access
Microsoft Word rich text Microsoft Internet Explorer HTML Microsoft Excel Microsoft Access SAP2000 Interactive Table Editing
From these programs you can print the tables. However, any changes you make to the tables cannot be brought back into the SAP2000 model while displaying. See topic Interactive Table Editing below for how to edit tabular data.
You have complete control over how the tables are to be formatted, as described in topic Format Control for Display and Printing. It is recommended that you not try to import Excel spreadsheet and Access database files created during tabular display, since any formatting applied to them for display purposes may cause an error upon import.
File > Print Tables Microsoft Word rich text Microsoft Internet Explorer HTML Format Control for Display and Printing
SAP2000 SAP2000 Microsoft Word rich text Microsoft Internet Explorer HTML ASCII SAP2000Microsoft Access Exporting Tabular Data
You can enter section headings, arbitrary text between the tables, and pictures using many different file formats. You have control over the formats of the tables, page setup, and fonts to use.
You can choose the types of data to edit, which determines the tables that are available. If you make a selection of objects before editing, only the selected objects will be available in tables that contain object-specific data. While you are in interactive table-editing mode, you can make any additions, deletions, or modifications you want to the tables you have chosen. When you are done, you must apply these changes to the model, or else quit table-editing mode without saving your changes. You can type numerical formulas (e.g., 2+3/4) directly into any cell. You can also right-click within any field (column) to pop up a useful menu. This menu allows you to display a description of the field. If the field expects text-type input then, in most cases, the menu also allows you to display a drop down list with all acceptable values for the selected cell. Finally, if the field expects numeric-type input then the menu allows you to pop up the SAP2000 Calculator. While working on a table, you can change the units used for a given field by clicking on the cell just below the column heading. Changing the units for one field will change the units for other related fields. The units you choose while interactively editing tables are temporary. All values will be converted back to the current model units once you apply your editing to the model. You can use the button To Excel on the SAP2000 Interactive Table Editing form to send the current table to Microsoft Excel, giving you full access to spreadsheet functionality to edit the table. When you are finished editing the data in Excel, do not close Excel. Instead, return to SAP2000 and click the From Excel button to save your changes or the Cancel Excel button to discard them; Excel will automatically be closed.
2+3/4 SAP2000
SAP2000 To Excel Microsoft Excel Excel SAP2000 From Excel Cancel Excel Excel
Microsoft Access Microsoft Excel ASCII File > Export Tabular Database File Formats SAP2000
SAP2000 SAP2000
File > Import SAP2000 Microsoft Access Microsoft Excel ASCII SAP2000 SAP2000 SAP2000 Tabular Database File Formats
When importing data into SAP2000 you have the option of importing a new model or adding to an existing model. If you import a new model then the file should include all importable information for a complete model. However, if you are adding to an existing model then your file can consist of one or more tables. The Program Control table must always be present for the database to be imported (otherwise an error will occur). Thus, if you want to import some new joints into an existing model your file could consist of only two tables, the Program Control table and the Joint Coordinates table. When adding to an existing model, you can choose how to handle conflicts between imported data and data that is already present in the model: Keep the existing item and ignore the imported item Delete the existing item and use the imported item Keep the existing item and add the imported item with a new name Some model definition data is importable, and some is not. For example, the coordinates of the joints are importable, as is the connectivity of the frame objects to the joints. The lengths of the frame objects are included for informational purposes with the model definition data, but lengths are not importable since they can be calculated from the coordinates of the joints to which each object is connected.
SAP2000 table and the Joint Coordinates table. Program Control Program ControlJoint Coordinates
SAP2000 .$2K
.$2K SAP2000 .SDB .$2K
Access
To do this, you specify a previously defined named set of model definition tables and/or a named set of analysis results tables to be exported. Named sets are defined using the menu command Define > Named Set, or they can be defined while displaying or printing tabular data.
Microsoft AccessMicrosoft Excel SAP2000 Options > Database > Table and Field Names SAP2000
Microsoft Access
SAP2000Access SAP2000
Program Control
All tables and fields use one consistent set of units, namely the current units in effect when the file is created. These units are stored in the Program Control table, not with the individual fields.
Microsoft Excel
SAP2000Excel SAP2000 Excel Options > Tables > Set Default Number Formatting Excel Joint Coordinates X Y Z Access
In Excel, the headers are color-coded. Fields that can be imported have yellow headers. Fields that are ignored upon import have cyan (light blue) headers.
Excel
SAP2000
More Information
Detailed information on using the various menu commands and forms is available using the online Help facility in the SAP2000 graphical user interface.
Complete documentation for any or all tables and fields can be produced using the menu command Options > Tables > Documentation to Word, which creates a Microsoft Word document that you can open and print.