CN202689338U

CN202689338U - Steel pipe FRP pipe concrete composite column

Info

Publication number: CN202689338U
Application number: CN 201120406034
Authority: CN
Inventors: 刘永军; 孙永梅
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2011-10-24
Filing date: 2011-10-24
Publication date: 2013-01-23
Anticipated expiration: 2021-10-24

Abstract

The utility model is a steel pipe FRP pipe concrete composite column which is formed by external steel pipes, internal circular-section FRP pipes, and central steel ribs through concreting. The external steel pipe is a rectangular steel pipe, a square steel pipe or a circular steel pipe; the internal circular-section FRP pipe is a CFRP pipe, a GFRP pipe, or a pipe made of other fiber reinforced composite materials; the central steel rib is welded or rolled solid-web section steel or lattice-form composite steel. The composite column is combined by steel pipes with different shapes, FRP pipes with different types, and steel ribs with different types. The utility model can effectively improve structure static performance, seismic behavior, and fire resistance, is convenient and rapid for construction and installation, and is mainly applicable to large-scale industrial buildings and civil buildings with high requirements for bearing capacity.

Description

A kind of steel pipe FRP pipe concrete coupled column

Technical field

The utility model relates to the combination load-carrying members of a kind of enhancement mode in the building field, definite say a kind of steel pipe FRP pipe concrete coupled column, this coupled column is under steel pipe, FRP pipe, reinforcing bar and concrete co-operation, can increase substantially the supporting capacity of member, can be used as supporting member and be widely used in large industrial buildings and civilian construction that supporting capacity is had relatively high expectations.

Background technology

At present, the concrete filled steel tube technology is existing in Practical Project uses more widely; The FRP that is made by fibre reinforced composites manages in the then more strengthening and rebuilding engineering that is applied to building structure; In order to bring into play to a greater extent the performance advantage of steel, FRP and three kinds of materials of concrete, the research of the combining structure that steel pipe, FRP pipe and these three kinds of materials of concrete are formed is progress to some extent also, and representative is steel pipe-FRP pipe-concrete combination column.

Steel pipe-FRP pipe-concrete combination column has been given full play to the performance advantage of steel, FRP and three kinds of materials of concrete, and brings out one's strengths to make up for one's weaknesses to interact and make it have better stress performance, has very large development prospect in Practical Project.Yet, in some large-scale construction engineering that supporting capacity is had relatively high expectations, want the steel pipe that utilizes stress performance good-FRP pipe-concrete combination column and just must add the large pillar sectional dimension and have enough supporting capacitys to guarantee it.Strengthen effective usage space that column cross-section size is not only wasted material but also affected building, be necessary to take new method effectively to improve the steel pipe-limitation of FRP pipe-concrete combination column aspect supporting capacity for this reason, make it have widely engineering using value.

Summary of the invention

The deficiency that exists in order to remedy above-mentioned prior art, main purpose of the present utility model are exploitation enhancement mode combination load-carrying members.This combining structure can increase substantially the supporting capacity of member under steel pipe, FRP pipe, reinforcing bar and concrete co-operation, can be used as in the large industrial buildings and civilian construction that supporting member is widely used in supporting capacity is had relatively high expectations.

Technical scheme is as follows:

A kind of steel pipe FRP pipe concrete coupled column, composite column by steel pipe-FRP tube-steel skeleton-concrete, to be combined behind concreting by outside steel pipe, inner circular cross section FRP pipe and the reinforcing bar that is positioned at the center, its outside steel pipe can be rectangular steel pipe, square steel pipe or round steel pipe, inner circular cross section FRP pipe can be the pipe that CFRP pipe (carbon fiber pipe), GFRP pipe (fiberglass pipe) or other fibre reinforced composites are made, and the center reinforcing bar can be welding, rolling real abdomen formula shaped steel or lattice combination steel.Its coupled column can be formed by difformity steel pipe, variety classes FRP pipe and dissimilar reinforcing bar any combination.And its thickness of steel pipe, FRP thickness of pipe wall, reinforcing bar size can be selected voluntarily according to actual requirement of engineering.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

1. composite column by steel pipe-FRP tube-steel skeleton-concrete is because the existence of post center reinforcing bar can on the basis of giving full play to steel, FRP and three kinds of material property advantages of concrete, significantly improve the supporting capacity of post, and need not to strengthen column cross-section size;

2. composite column by steel pipe-FRP tube-steel skeleton-concrete; be positioned at inner FRP pipe owing to being subject to the protective effect of outside steel pipe and annular concrete layer; can effectively overcome the poor shortcoming of fire resistance; make it under the high temperature fire condition, still can bring into play high-strength, efficient advantage, make the enhancement mode coupled column show superior fire resistance.

Description of drawings

Fig. 1 is schematic cross-section of the present utility model;

Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12 are the various combination column section schematic diagram of different reinforcing bars and difformity steel pipe and FRP pipe and the formation of concrete various combination form.

Wherein 1 represents steel pipe, 2 expression FRP pipes, 3 expression reinforcing bars, 4 expression concrete

Accompanying drawing supplementary notes: the utility model is applicable to the supporting member in large industrial buildings and the civilian construction, when supporting member is bidirectional eccentric pressurized and two planes when all being principal plane, should adopt the section form of Fig. 4, Fig. 6, Figure 10, Figure 12; When supporting member is bidirectional eccentric pressurized and when only having a principal plane, should select the section form of Fig. 5, Figure 11; When supporting member is the one-way eccentric pressurized, should select Fig. 1, Fig. 2, Fig. 3, the section form of Fig. 7, Fig. 8, Fig. 9; When supporting member is uniaxial force, should select comparatively economical and practical Fig. 1, the section form of Fig. 2.

The specific embodiment

1) according to actual demands of engineering be ready to construct required steel pipe, FRP pipe and reinforcing bar.Steel pipe can be square steel pipe or round steel pipe, the FRP pipe can be that GFRP pipe (fiberglass pipe), CFRP pipe (carbon fiber pipe), AFRP manages (aramid fiber pipe) or other fibre reinforced composites tubulations, and reinforcing bar can be that rolling, the real abdomen formula shaped steel of welding or lattice make up steel.

2) with steel pipe, FRP pipe and reinforcing bar location and installation in the design code position, note making its centre of form to overlap, when steel pipe, FRP pipe and reinforcing bar fall short of when needing spreading, seam should not on same cross section, should stagger mutually.

3) concreting, required concrete can be selected ordinary concrete or high-strength concrete according to actual demands of engineering, annular concrete and core concrete between steel pipe and the FRP pipe can be built simultaneously, for guaranteeing concrete pouring quality, should adopt preferably concrete of workability.

4) the normal temperature maintenance is to designing requirement intensity, and outer surface of steel tube namely forms composite column by steel pipe-FRP tube-steel skeleton-concrete by related specifications regulation brush fire-resistant anticorrosion paint.

Claims

1. steel pipe FRP pipe concrete coupled column is characterized in that: described coupled column is comprised of behind concreting outside steel pipe (1), inner circular cross section FRP pipe (2) and the reinforcing bar (3) that is positioned at the center.

2. a kind of steel pipe FRP pipe concrete coupled column according to claim 1, it is characterized in that: outside steel pipe can be rectangular steel pipe, square steel pipe or round steel pipe, inner circular cross section FRP pipe can be the pipe that CFRP pipe, GFRP pipe or other fibre reinforced composites are made, and the center reinforcing bar can be welding, rolling real abdomen formula shaped steel or lattice combination steel.