CN102002982A

CN102002982A - Square steel tube concrete beam/column node of built-in CFRP (carbon fiber reinforced plastic) circular tube

Info

Publication number: CN102002982A
Application number: CN 201010557115
Authority: CN
Inventors: 李帼昌; 刘雨
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2010-11-24
Filing date: 2010-11-24
Publication date: 2011-04-06

Abstract

The invention discloses a square steel tube concrete beam/column node of a built-in CFRP (carbon fiber reinforced plastic) circular tube, relating to a building element. The square steel tube concrete beam/column node is composed of a CFRP circular tube, a square steel tube column and an H-shaped steel beam. The invention is characterized in that the square steel tube concrete beam/column node is a T-shaped reinforcing rib type node, and is also a node of square steel tube concrete and the H-shaped steel beam of the built-in CFRP circular tube. By utilizing the advantages of high tensile strength, light dead weight and the like of CFRP, the constraint effect of core concrete is enhanced, thereby enhancing the rigidity, bearing capacity and earthquake-resistant behavior of the element. The forms of the node are outer reinforcing ring node, T-shaped reinforcing rib node, penetrated bolt end plate type node and the like. Due to the addition of the CFRP circular tube, in the invention, the dead weight of the building structure is reduced, the earthquake-resistant behavior of the structure is enhanced and the steel consumption is reduced, the cross-sectional area is reduced, the usable floor area of the building is increases; and the invention has favorable economic benefit and environmental benefit.

Description

The square steel pipe concrete beam and column node of built-in CFRP pipe

Technical field

The present invention relates to a kind of building unit, particularly relate to a kind of square steel pipe concrete beam and column node of built-in CFRP pipe.

Background technology

Steel core concrete column utilizes steel pipe and two kinds of materials of concrete at loading process compound action each other, give full play to the advantage of these two kinds of materials, concrete plasticity and toughness are greatly improved, and avoid or delay steel pipe generation cripling, make steel core concrete column total bearing capacity height, plasticity and good toughness.But for towering, stride with heavy structure and exist the too too fat to move phenomenon of steel pipe column greatly, the application of the concrete filled steel tube of influence greatly.The adding of CFRP pipe has improved the constraint of steel pipe to high-strength concrete, has improved the ability of high-strength concrete and steel pipe collaborative work, has strengthened the anti-seismic performance of member, has reduced dead load and construction costs, the more important thing is and has reduced column cross-section size.Successively issued at present the design discipline of relevant encased structures, mainly contained JCJ01-89:(1989 by national building materials general bureau, the Ministry of Construction, State Economic and Trade Commission and The General Logistics Department of PLA, China Engineering Construction Standardization Association's promulgation), CECS28:90(1992), DL/T5085-1999 and GJB(1999), CES 159:2004.

Summary of the invention

The object of the present invention is to provide a kind of square steel pipe concrete beam and column node of built-in CFRP pipe.This node has bigger rigidity and bearing capacity, reduces column cross-section size, has increased the usable floor area of building, and has good economic effect, and has reduced owing to producing the problem of environmental pollution that steel produce.

The objective of the invention is to be achieved through the following technical solutions:

The square steel pipe concrete beam and column node of built-in CFRP pipe, constitute by CFRP pipe and quadrate steel pipe column and H section steel beam, the square steel pipe concrete joint of built-in CFRP pipe is a T type stiffening rib formula node, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

The square steel pipe concrete beam and column node of described built-in CFRP pipe, the square steel pipe concrete joint of its built-in CFRP pipe are outer annular-stiffer formula node, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

The square steel pipe concrete beam and column node of described built-in CFRP pipe, the square steel pipe concrete joint of its built-in CFRP pipe are the board-like node of punching bolt end, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

The square steel pipe concrete beam and column node of described built-in CFRP pipe, the square steel pipe concrete joint of its built-in CFRP pipe are reinforced concrete circle beam formula node, and it is the square steel pipe concrete of built-in CFRP pipe and the node of reinforced concrete beam.

The square steel pipe concrete beam and column node of described built-in CFRP pipe, the square steel pipe concrete joint of its built-in CFRP pipe are the full bolt type node of end plate cellular-type, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

Advantage of the present invention and effect are:

Along with improving constantly of China's steel output, quality, the application of steel-concrete combined structure in high level, super highrise building more and more widely especially adopts vertical supporting member of steel core concrete column conduct and CFRP in the constantly ripe trend of the technology in structural strengthening field.Three kinds of materials are combined, utilize separately advantage solved combining structure towering, greatly stride with heavy structure in the problem that exists.

Reduce the use amount of steel, alleviated the deadweight of structure.Increased the usable floor area of building.Speed of application has reduced labour cost and overhead cost soon.

The good seismic resistance that has this category node has reduced node brittle fracture that produces because of earthquake and casualties and the property loss that therefore produces.

Description of drawings

Fig. 1-1, Fig. 1-2 are the schematic diagram of T type stiffening rib formula node structure;

Fig. 2-1, Fig. 2-2 connects the schematic diagram of outer annular-stiffer formula node structure for beam;

Fig. 3-1, Fig. 3-2 is the schematic diagram of the board-like node of punching bolt end;

Fig. 4 adds the schematic diagram of bracket structure at the bottom of for reinforcing ring;

The schematic diagram of the full bolt type structure of Fig. 5-1, Fig. 5-2 end plate cellular-types.

The specific embodiment

The present invention is made of concrete, square steel pipe and CFRP pipe and beam, has strengthened constraint to core concrete at built-in CFRP pipe, has improved rigidity, bearing capacity and the anti-seismic performance of post.

The present invention studies several principal modes such as outer annular-stiffer node, T type stiffening rib formula node and the board-like nodes of punching bolt end.The square steel pipe concrete beam and column node form that comprises the built-in CFRP pipe of the present invention.The concrete-filled steel square tubular column of the built-in CFRP pipe of the present invention and concrete beam connected node.

The built-in CFRP pipe of the present invention has been strengthened the constraint to core concrete, has improved rigidity, bearing capacity and the anti-seismic performance of post.

Shown in Fig. 1-1, Fig. 1-2, the square steel pipe concrete joint of this built-in CFRP pipe that the present invention provides is a T type stiffening rib formula node, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

Shown in Fig. 2-1, Fig. 2-2, the square steel pipe concrete joint of this built-in CFRP pipe that the present invention provides is an outer annular-stiffer formula node, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

Shown in Fig. 3-1, Fig. 3-2, the square steel pipe concrete joint of this built-in CFRP pipe that the present invention provides is the board-like node of punching bolt end, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

As shown in Figure 4, the square steel pipe concrete joint of this built-in CFRP pipe that invention provides is a reinforced concrete circle beam formula node, and it is the square steel pipe concrete of built-in CFRP pipe and the node of reinforced concrete beam.

Shown in Fig. 5-1, Fig. 5-2, the square steel pipe concrete joint of this built-in CFRP pipe that invention provides is the full bolt type node of end plate cellular-type, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

Claims

1. the square steel pipe concrete beam and column node of built-in CFRP pipe, constitute by CFRP pipe and quadrate steel pipe column and H section steel beam, it is characterized in that the square steel pipe concrete joint of built-in CFRP pipe is a T type stiffening rib formula node, it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

2. the square steel pipe concrete beam and column node of built-in CFRP pipe according to claim 1, it is characterized in that, the square steel pipe concrete joint of built-in CFRP pipe is an outer annular-stiffer formula node, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

3. the square steel pipe concrete beam and column node of built-in CFRP pipe according to claim 1, it is characterized in that, the square steel pipe concrete joint of built-in CFRP pipe is the board-like node of punching bolt end, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.

4. the square steel pipe concrete beam and column node of built-in CFRP pipe according to claim 1, it is characterized in that, the square steel pipe concrete joint of built-in CFRP pipe is a reinforced concrete circle beam formula node, and it is the square steel pipe concrete of built-in CFRP pipe and the node of reinforced concrete beam.

5. the square steel pipe concrete beam and column node of built-in CFRP pipe according to claim 1, it is characterized in that, the square steel pipe concrete joint of built-in CFRP pipe is the full bolt type node of end plate cellular-type, and it is the square steel pipe concrete of built-in CFRP pipe and the node of H section steel beam.