KR101165207B1 - Closed steel composite girder and how the connection between a closed steel composite girder - Google Patents

Abstract

PURPOSE: A closed-type steel composite beam and a connection method thereof are provided to enable the easy connection work of steel composite beams through the opened parts of side vertical plates. CONSTITUTION: A closed-type steel composite beam comprises a lower plate(10), a center vertical plate(20), an upper plate(30), a first side vertical plate(40), a first deck plate support(50), a second side vertical plate(60), a second deck plate support(70), and horizontal members(80). The center vertical plate is vertically installed at the center of the top of the lower plate in the same length as the lower plate. The upper plate is installed on the top end of the center vertical plate. The first and second side vertical plates are vertically installed at one and the other ends of the lower plate. the first deck plate support is installed on the top end of the first side vertical plate, and the second deck plate support is installed on the top end of the second side vertical plate. The horizontal members are installed on the tops of the first and second deck plate supports and the upper plate at uniform intervals.

Description

Closed steel composite girder and how the connection between a closed steel composite girder}

The present invention relates to a method of connecting between closed steel composite beams and closed steel composite beams, and more specifically, the side plate can be installed at the same height by configuring the vertical plate equal to the length of the central vertical plate, the top plate The upper part of the side vertical plate is connected to the transverse member such as reinforcing bars to form a closed cross section, thereby improving structural rigidity, and opening part of the side vertical plate to secure the ease of work when connecting the closed steel composite beam. It relates to a closed steel composite beam characterized by the point.

In general, in constructing a building, an appropriate structure type is selected and constructed in view of the purpose and function of the building, securing stability against external force, and economic efficiency. As such a structural type, various structural systems including wooden structures, reinforced concrete structures, steel structures, and the like have been conventionally applied. Among them, the most commonly used structural forms include reinforced concrete structures and steel structures. Can be.

The reinforced concrete structure is constructed by integrating the strengths and weaknesses of the reinforcing bars and concretes together to complement each other, which is used to reinforce the shortcomings of concretes, which are relatively less resistant to tensile stress than the compressive strength. By placing reinforcing bars in the part, the compressive stress is applied to the concrete when the external force is applied, and the tensile stress is applied to the reinforcing bars, respectively, to allow the composite to resist the external force.

Since the reinforced concrete structure is made of concrete, which is a relatively inexpensive material, as a main material, it has the advantages of low construction cost and high economical efficiency, as well as high formability, fire resistance, and durability. Has been.

However, such a reinforced concrete structure has a disadvantage in that it has a larger self weight, is more likely to crack than other structures, and above all, costs and air are required for installation and dismantling of formwork. Steel structure, on the other hand, is a structural form that assembles steel plate and various shaped steel members by joining method such as bolting and welding in constructing the structure, and the steel used in steel structure has better structural performance than other materials such as concrete. In the construction method, since the unit members are installed and assembled by using heavy equipment, the construction period is shortened and the relatively constant quality is guaranteed. Recently, most of high-rise buildings are constructed by steel structure. It is becoming.

Composite beam refers to a beam that effectively integrates steel beams and reinforced concrete slabs by shear bonding, and has a flexural stiffness that is about two to three times higher than the rigidity of steel frames. It is particularly advantageous for beams with low deflection and vibration or shock loads. In addition, since the weight can be reduced by 20 to 30% compared to reinforced concrete beams, there is an advantage in lightening the building.

Among these synthetic beams, for example, steel composite beams presented in Korean Patent Registration No. 10-0851490 (hereinafter referred to as "quotation document"), as shown in Figure 1, the bent portion of the iron plate (1a) of both wings (1) The height is lower than the upper flange (2), and by installing a deck plate (D) here is to reduce the height of the floor.

However, the above-mentioned cited document is vulnerable to buckling when the deck plate (D) of high load is seated on both wings (1), and when used in combination with general H-beams, the height difference of the support point of the deck plate is difficult to construct There were a lot.

The present invention has been made to solve the problems of the conventional steel composite beam as described above, the main object of the present invention is to configure the length of the side vertical plate and the center vertical plate the same, for use with a common H-shaped steel beam for slab The deck plate can be installed at the same height, and the upper plate and the upper side of the vertical vertical plate to provide a closed steel composite beam that is connected to the horizontal member such as rebar.

In addition, it is to provide a closed steel composite beam that can secure the ease of operation during the composite beam connection work by opening part of the side vertical plate between the closed steel composite beam.

In addition, it is to provide a closed steel composite beam to solve the problem of buckling by reinforcing between the upper side of the side vertical plate and the upper plate by a horizontal member such as rebar.

According to an aspect of the present invention for achieving the above object,

Horizontal bottom plate; A central vertical plate having a length equal to that of the lower plate and installed vertically on an upper center portion of the lower plate; An upper plate installed at an upper end of the central vertical plate so as to be horizontal with the lower plate, and having a narrower width than the lower plate; A first side vertical plate installed vertically at one end of the lower plate, the one end of which is located at a portion where the one front end is retracted rearward by a predetermined distance from the one end of the lower plate corresponding thereto; A first deck plate pedestal installed horizontally at the same height as the upper plate while being spaced apart from the upper plate at a predetermined interval on an upper end of the first side vertical plate; A second side vertical plate disposed vertically at the other end of the lower plate, the one end of which is located at a portion where the one end portion is retracted rearward by a predetermined distance from the one end of the lower plate corresponding thereto; A second deck plate pedestal installed horizontally at the same height as the upper plate while being spaced apart from the upper plate at a predetermined interval on an upper end of the second side vertical plate; And a plurality of transverse members fixed on the first deck plate pedestal, the top plate, and the second deck plate pedestal at regular intervals.

In addition, the first deck plate pedestal of the present invention is formed to be bent outward from the upper end of the first side vertical plate, the second deck plate pedestal is formed to be bent outward from the upper end of the second side vertical plate It features.

In addition, the first and second deck plate pedestal of the present invention is characterized in that the deck plate position is provided with the end portion of the deck plate is located in the remaining portion of the horizontal member is installed.

In addition, the transverse member of the present invention is characterized in that any one of rebar, iron bar, iron plate.

In addition, the present invention is characterized in that a plurality of fastening holes are formed in an area deviating from the distal end portions of the first and second side vertical plates among the distal end portions of the lower plate, the central vertical plate, and the upper plate.

According to this aspect of the present invention, as a closed steel composite interpolation connecting method for interconnecting the closed steel composite beams, the first and second side plates of the closed steel composite beams and the first of the relative closed steel composite beams A step of closely contacting the closed steel composite beam and the relative closed steel composite beam so that the two side vertical plate ends are spaced apart from each other; The central vertical plate, the upper plate, and the lower plate of the closed steel composite beam and the relative closed steel composite beam are bound by brackets and bolts, and when the brackets and bolts are bonded, the spaced apart of the closed steel composite beams and the relative closed steel composite beams Binding through the first and second side vertical plates; Provided is a method for connecting between closed steel composite beams comprising a step of blocking between the first and second side vertical plates of the closed steel composite beams and the first and second side vertical plates of the relative closed steel composite beams. do.

In addition, the blocking plate of the present invention is a blocking plate having a longer length than the distance between the side vertical plate of the closed steel composite beam and the side vertical plate of the relative closed steel composite beam, the upper side of the first side vertical plate of each composite beam And a hook portion bent outwardly from the top of the blocking plate portion so as to surround the upper portion of the formed first deck plate pedestal and the upper portion of the second deck plate pedestal formed on the upper side of the second side vertical plate. .

According to the present invention, the length of the side vertical plate and the center vertical plate may be the same, and the deck plate supported by the side vertical plate and the center vertical plate may be installed at the same height.

In addition, since the side vertical plate is partially opened, the connection work can be performed through the opened portion during the connection work between the closed steel composite beams, thereby ensuring the ease of connection work.

In addition, the upper side and the upper side of the vertical plate is reinforced with a horizontal member such as reinforcing bar to improve the reinforcement, and can solve problems such as buckling can ensure the reliability of the product.

1 is a cross-sectional view showing an example of a conventional steel composite beam.
2 is a perspective view of a closed steel composite beam according to the present invention.
3 is a view for explaining a method of connecting the closed steel composite composite beam according to the present invention, a state diagram before the connection.
4 is a view for explaining a method of connecting closed steel composite composite interpolation according to the present invention, the connection is completed.
5 is a view for explaining a method of connecting between closed steel composite beams in accordance with the present invention, a state diagram blocking the opening between the two closed steel composite beams.
6 is a cross-sectional view taken along the line AA of FIG. 5.

Hereinafter, embodiments of the present invention are described.

Embodiments disclosed are provided to enable those skilled in the art to easily understand the spirit of the present invention, and the present invention is not limited thereto. Embodiments of the invention may be modified in other forms within the spirit and scope of the invention. As used herein, the term " and / or " is used to include at least one of the preceding and following elements. "On" other elements herein means that other elements are directly located on one element and that the third element is further located on the one element . Although each element or portion of the specification is referred to by using the expressions of the first and second expressions, it is not limited thereto. The thicknesses and relative thicknesses of the components shown in the figures may be exaggerated to clearly illustrate the embodiments of the present invention. In addition, the matters described in the attached drawings may be different from those actually implemented by the schematic drawings to easily describe the embodiments of the present invention.

2 is a perspective view of a closed steel composite beam according to the present invention.

2, the closed steel composite beam of the present invention, the lower plate 10, the central vertical plate 20, the upper plate 30, the first side vertical plate 40, the first deck plate pedestal 50 , A second side vertical plate 60, a second deck plate pedestal 70, and a horizontal member 80.

The lower plate 10 does not have a specified length (and thus can be configured to be long or short) and has a rectangular shape in plan view, while the center vertical plate 20, the first side vertical plate 40 and It serves to support the lower end of the second side vertical plate 60. A plurality of fastening holes 11 may be formed in an area deviating from the front end portions of the first and second side vertical plates 40 and 60 among the front end portions of the lower plate 10. The fastening hole 11 is for fastening the bolt (b) when connecting the closed steel composite interpolation. Detailed description thereof will be described later.

The central vertical plate 20 is vertically installed with the same length as the lower plate 10 in the upper width direction center portion of the lower plate 10. The lower end of the central vertical plate 20 and the lower plate 10 may be coupled by welding. A plurality of fastening holes 21 may be formed in an area deviating from the front end portions of the first and second side vertical plates 40 and 60 among the front end portions of the central vertical plate 20. The fastening hole 21 is for fastening the bolt (b) (shown in Figure 3) when connecting the closed steel composite interpolation. Detailed description thereof will be described later.

The upper plate 30 is installed to be horizontal with the lower plate 10 at the top of the central vertical plate 20. At this time, the width of the upper plate 30 is significantly narrower than the lower plate 10, the coupling method may be coupled to the center portion of the central vertical plate 20 by welding. In addition, a plurality of fastening holes 31 may be formed in an area deviating from the front end portions of the first and second side vertical plates 40 and 60 among the front end portions of the upper plate 30. The fastening hole 31 is for fastening the bolt (b) when connecting the closed steel composite interpolation. Detailed description thereof will be described later.

The first side vertical plate 40 is vertically installed at one end of the lower plate 10. In this case, one end portion of the first side vertical plate 40 is positioned at a portion that is retracted backward by a predetermined distance from the one end portion of the lower plate 10 corresponding thereto. In other words, the length of the first side vertical plate 40 is shorter than the length of the lower plate 10. The reason is necessary when connecting closed steel composite beams to each other. That is, when connecting the closed steel composite beam, the bracket (bk) is padded on the boundary end of the center vertical plate, the upper plate, and the lower plate of the closed steel composite beam (A) and the relative closed steel composite beam (B), and then the bolt (b) is attached. The joint is joined. Some of these operations (middle vertical plate connection work and lower plate connection work) is to be made in the interior of the composite beam, it is difficult to connect when the interior is blocked by the first side vertical plate 40 As described above, the length of the first side vertical plate 40 is shortened to form the opening O so that the connection work can be easily performed.

The first deck plate pedestal 50 has the same length as the first side vertical plate 40 and is installed on the top of the first side vertical plate. At this time, the first deck plate pedestal 50 is spaced apart from the upper plate 30 by a predetermined interval to inject concrete through it, and is installed horizontally with the same height as the upper plate 30. In addition, the first deck plate pedestal 50 may be coupled to the upper end of the first side vertical plate 40 by welding, or alternatively, may be formed by bending outward or inward. In addition, one end of the horizontal member 80 is fixed to a portion of the first deck plate pedestal 50, and the deck plate (D) is seated on the other part.

The second side vertical plate 60 is vertically installed at the other end of the lower plate 10. That is, the second side vertical plate 60 is installed symmetrically with the first side vertical plate 40 about the center vertical plate 20, and the structure thereof is not different from that of the first side vertical plate 40. .

In other words, one end portion of the second side vertical plate 60 is positioned at a portion that is retracted to the rear by a predetermined distance from the one end portion of the lower plate 10 corresponding thereto. In other words, the length of the second side vertical plate 60 is shorter than the length of the lower plate 10. The reason is the same as that of the first side vertical plate 40, and thus will be omitted.

The second deck plate pedestal 70 has the same length as the second side vertical plate 60 and is installed on the top of the second side vertical plate. In this case, the second deck plate pedestal 70 is spaced apart from the upper plate 30 at a predetermined interval to inject concrete therethrough, and is installed horizontally with the same height as the upper plate 30. The second deck plate pedestal 70 may be coupled to the upper end of the second side vertical plate 60 by welding, or alternatively, may be formed by bending outward or inward. In addition, the other end of the horizontal member 80 is fixed to a part of the second deck plate pedestal 70, and an end of the deck plate D is located at the other part.

The horizontal member 80 is installed across the upper portion of the first deck plate pedestal 50, the top plate 30 and the second deck plate pedestal 70, a plurality are installed at regular intervals. The horizontal member 80 substantially supports the upper ends of the first and second side vertical plates 40 and 60 to prevent buckling of these vertical plates. In this case, the transverse member 80 may be selected and applied to any one of rebar, iron wire, and iron plate, but the drawing shows the rebar as one example.

Hereinafter, a method of connecting the closed steel composite interpolation having the above configuration will be described.

First, in one step, the closed steel composite beam (A) and the relative closed steel composite beam (B) is in close contact.

In other words, as shown in FIG. 3, the first and second side plates 40 and 60 of the closed steel frame composite beam A, which are fastened to the pillar C, and the first and second closed steel frame composite beams B, respectively. The closed side steel composite beam A and the relative closed steel composite beam B are brought into close contact with each other such that the ends of the two side vertical plates 40 and 60 are spaced apart from each other.

In step 2, the close closed steel composite beam (A) and the relative closed steel composite beam (B) are bonded.

In other words, as shown in Figure 4, each of the central vertical plate 20, the upper plate 30, the lower plate 10 of the closed steel composite beam (A) and the relative closed steel composite beam (B) bracket (bk) And bolt (b). At this time, when the bracket (bk) and the bolt (b) is engaged, between the first side vertical plate 40 of the closed steel composite beam (A) and the relative closed steel composite beam (B), or the second side Bind through the spaced apart between the vertical plate 40.

As described above, when connecting the closed steel composite beam between the closed steel composite beam (A) and the relative closed steel composite beam (B) of the center vertical plate, top plate, the bottom plate of the bracket (bk) to the end of the border After the bolt (b) is fastened to the joint. Some of these operations (middle vertical plate connection work and lower plate connection work) is performed in the interior of the composite beam, the interior of the first side vertical plate 40 or the second side vertical plate 60 If blocked, the connection work may be difficult, so as to form the opening O by shortening the length of the first side vertical plate 40 and the second side vertical plate 60 as described above, the connection work can be easily performed. .

In step 3, the opening is closed.

In detail, as shown in FIGS. 5 and 6, the first and second side vertical plates 40 and 60 of the closed steel composite beam A and the first and second side vertical plates of the relative closed steel composite beam B ( 40, 60 is blocked by the blocking plate 90. If you do this, you will not leak even if you put concrete inside the composite beam.

In this case, the blocking plate 90 is longer than the distance between the side vertical plates (40, 60) of the closed steel composite beam (A) and the side vertical plates (40, 60) of the relative closed steel composite beam (B). Blocking plate portion 91 having; Outward from the upper end of the blocking plate 91 so as to surround the upper part of the first and second deck plate pedestals 50 and 70 formed on the upper ends of the first and second side vertical plates 40 and 60 of the respective composite beams, respectively. It consists of a hook portion 93 bent in two stages.

On the other hand, after finishing the binding of the closed steel composite beam (A) and the relative closed steel composite beam (B) and the opening therebetween by the blocking plate 90, as shown in Figure 6 concrete into the interior of each composite beam Pour it. Subsequently, end portions of the deck plates D are seated on the remaining portions of the first and second deck plate pedestals 50 and 70 where the horizontal members 80 are fixed, as shown in FIG. 6. Although the hook portion 93 of the blocking plate 90 is already hung on the deck plate pedestals 50 and 70, the hook portion 93 has a thickness of only 2 to 3 mm so that the deck plate D may be seated thereon. There is no big problem in construction.

10: lower plate 20: center vertical plate
30: top plate 40: first side vertical plate
50: first deck plate support 60: second side vertical plate
70 second deck plate pedestal 80 horizontal member
90: blocking plate

Claims (7)

Horizontal bottom plate 10;
A central vertical plate 20 which is the same length as the lower plate 10 and is installed vertically at the center of the upper surface of the lower plate 10;
An upper plate 30 installed horizontally with the lower plate at an upper end of the central vertical plate and having a narrower width than the lower plate;
A first side vertical plate 40 disposed vertically at one end of the lower plate 10 and positioned at a portion where one end thereof is retracted rearward by a predetermined distance from one end of the lower plate 10 corresponding thereto;
A first deck plate pedestal 50 installed horizontally at the same height as the upper plate 30 while being spaced apart from the upper plate 30 at a predetermined interval on an upper end of the first side vertical plate 40;
A second side vertical plate 60 installed vertically at the other end of the lower plate 10, the one end of which is located at a portion which is retracted rearward by a predetermined distance from one end of the lower plate 10 corresponding thereto;
A second deck plate pedestal 70 installed horizontally at the same height as the upper plate 30 while being spaced apart from the upper plate 30 at a predetermined interval on an upper end of the second side vertical plate 60; And
A plurality of transverse members 80 fixed to the first deck plate pedestal 50, the upper plate 30 and the second deck plate pedestal 70 at a predetermined interval;
Closed steel frame composite beam comprising a. The method of claim 1,
The first deck plate pedestal 50 is formed to be bent inward or outward from the upper end of the first side vertical plate 40, the second deck plate pedestal 70 is the second side vertical plate 60 Closed steel composite beam, characterized in that formed to be bent inward or outward from the top of the. The method of claim 1,
The first and second deck plate pedestal (50, 70) is characterized in that the deck plate position portion 51 is provided with the end of the deck plate (D) is located in the remaining portion of the horizontal member 80 is installed Closed steel composite beam. The method of claim 1,
The horizontal member 80 is a closed steel composite beam, characterized in that any one of the reinforcing bars, iron bars, steel plate. The method of claim 1,
A plurality of fastening holes 11, 21, which are located in an area deviating from the distal end portions of the first and second side vertical plates 40 and 60 among the distal end portions of the lower plate 10, the central vertical plate 20, and the upper plate 30. 31) is a closed steel composite beam, characterized in that each formed. As a method of connecting between closed steel composite beams for interconnecting the closed steel composite beams of any one of claims 1 to 5,
Closed so that the tip of the first and second side vertical plates 40 and 60 of the closed steel composite beam A and the tip of the first and second side vertical plates 40 and 60 of the relative closed steel composite beam B are spaced apart from each other. Step (S10) to closely contact the type steel composite beam (A) and the relative closed steel composite beam (B);
The central vertical plate 20, the upper plate 30, the lower plate 10 of the closed steel composite beam (A) and the relative closed steel composite beam (B) is bound by brackets (bk) and bolts (b), , When the bracket and the bolt is engaged, between the closed side steel composite beam (A) and the relative closed steel composite beam (B) spaced between the first side vertical plate 40 or between the second side vertical plate 40 Binding through (S20); And
Blocking plate 90 between the first and second side vertical plates 40 and 60 of the closed steel composite beam A and the first and second side vertical plates 40 and 60 of the relative closed steel composite beam B Blocking by;
Method of connecting closed steel frame composite beam comprising a. The method of claim 6,
The blocking plate 90 has a longer length than the distance between the side vertical plates 40 and 60 of the closed steel composite beam A and the side vertical plates 40 and 60 of the relative closed steel composite beam B. The blocking plate portion 91 and the blocking plate portion so as to surround the upper portions of the first and second deck plate pedestals 50 and 70 formed on the upper ends of the first and second side vertical plates 40 and 60 of the respective composite beams ( The method of connecting closed steel composite composite beam, characterized in that consisting of a hook portion (93) bent outward from the top of the 91.

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