CN2747302Y

CN2747302Y - Stee skeleton-pipe concrete column

Info

Publication number: CN2747302Y
Application number: CN 200420113700
Authority: CN
Inventors: 徐亚丰
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2004-11-26
Filing date: 2004-11-26
Publication date: 2005-12-21
Anticipated expiration: 2014-11-26

Abstract

The utility model relates to a concrete construction, in particular to a steel skeleton-pipe concrete column used for civil engineering. The utility model comprises a steel skeleton and a steel pipe, which are arranged in the concrete column. The steel skeleton is arranged on the outside of the steel pipe, the steel skeleton and the steel pipe are poured in the concrete. The steel pipe is arranged on the center position of the concrete column and the steel skeleton is arranged on the four angles of the outside steel pipe and the inside concrete column. The steel pipe of the utility model is arranged in the concrete column and the steel skeleton is disposed outside the steel pipe. The steel pipe and the steel skeleton respectively play a restrictive role with the concrete to improve the bearing ability, the aseismic capability, and the ductility of the concrete column, so the section size of the column is decreased and the useable floor area is increased. The utility model is beneficial for the aseismatic design of the earthquake zone and minishes the diameter of the steel pipe after selecting steel skeleton rationally, and is also convenient for operation in construction.

Description

Steel frame-steel pipe concrete column

Technical field

The utility model relates to concrete structure, particularly a kind of steel frame-steel pipe concrete column that is used for civil engineering.

Background technology

Because high-strength concrete has intensity height, distortion characteristics such as little, impervious corrosion resistance is good, can improve the supporting capacity of concrete structure and member, the sectional dimension that structural element is conducted oneself with dignity, reduced to the reduction concrete structure significantly, therefore in highrise building, large-span structure, in order to reduce the size of column section, and use high-strength concrete widely.But the ductility of high-strength concrete is relatively poor, influences the anti-seismic performance of structure.In order to address this problem, " steel reinforced concrete structure ", " encased structures " and " steel frame-steel pipe concrete combination column " these three kinds of form of structure of ductility have successively appearred improving:

1. " steel reinforced concrete structure " is a kind of structure that shaped steel is set at inside concrete, the form of reinforcing bar has a variety of, and the open web type combined steel and concrete column promptly is a kind of form wherein, as shown in Figure 1, reinforcing bar by angle steel 1 through level and oblique batten plate be welded integral body, not configuration reinforcement.Because reinforcing bar is to concrete effect of contraction, the raising of the bearing capacity of the reinforced concrete post of the identical steel ratio of its bearing capacity ratio has surpassed 10%, and ductility has obtained obvious improvement.But this structure is limited to concrete constraint, so the improvement of its supporting capacity and ductility is limited.

2. in " encased structures ", steel core concrete column can be divided into steel pipe at the steel core concrete column in the post outside and the steel pipe steel core concrete column in the post inboard, and the former is commonly referred to steel core concrete column, and the latter is commonly referred to the concrete filled steel tube coupled column.The concrete filled steel tube coupled column is provided with many reinforcing bars 2 as shown in Figure 2 in the coupled column, steel pipe 3 places the post centre, and its diameter is less than the column section length of side.Because the steel core concrete column construction is complicated, steel pipe needs problems such as fire prevention, antirust processing, so when building highrise building and bridge construction, adopt the form of concrete filled steel tube coupled column at present mostly.In the concrete filled steel tube coupled column, the strength grade of concrete in the steel pipe 3 are generally equal to or are higher than the outer strength grade of concrete of steel pipe 3.Because the concrete of 3 pairs of core spaces of steel pipe provides effect of contraction, produced the sleeve effect, so the concrete filled steel tube coupled column can reduce the whole anti-seismic performance of the plastic displacement of structure, the energy dissipation capacity that increases structure, raising building, its energy dissipation capacity is apparently higher than the ordinary reinforced concrete post, and capability of energy dissipation is about about the latter's twice.But also there are many weak points in the concrete filled steel tube coupled column, as: 1. work as the house number of plies of building and get over for a long time, the load that post is born will strengthen, the sectional dimension of the post that needs is just big more, in order to reduce the sectional dimension of post, just need the thicker steel pipe of wall thickness to offer enough " sleeve " effects of concrete, so need the special processing of factory, must improve construction costs, in engineering, realize relatively difficulty simultaneously; 2. for the bigger post of sectional dimension, select large diameter steel pipe for use, no doubt can improve steel pipe and contain rate, still may cause the increase of steel pipe consumption like this, improve construction costs, increase construction, especially the difficulty of construction of node; 3. because the concrete filled steel tube coupled column mainly provides ductility by longitudinal reinforcement,, cause the difficulty of construction so often need more longitudinal reinforcement.

3. " steel frame-steel pipe concrete combination column " as shown in Figure 3 is provided with reinforcing bar 4 in the steel pipe 3, concreting in the steel pipe 3.In existing this " steel frame-steel pipe concrete column ", though 4 pairs of concrete of steel pipe 3 and reinforcing bar all play effect of contraction, improve its supporting capacity and anti-seismic performance, because reinforcing bar 4 is positioned at steel pipe 3, not only increased the diameter of steel pipe 3, operation when being inconvenient to construct simultaneously.

The utility model content

The weak point of above-mentioned in order to solve " steel reinforced concrete structure ", " encased structures " and " steel frame-steel pipe concrete combination column ", the purpose of this utility model is to provide a kind of steel pipe and reinforcing bar respectively concrete to be played effect of contraction, improves supporting capacity and anti-seismic performance, the steel frame-steel pipe concrete column that diameter of steel tube is little.

The purpose of this utility model is achieved through the following technical solutions:

The utility model comprises reinforcing bar and steel pipe, and both all are located in the concrete column, and the outside of steel pipe is provided with reinforcing bar, and steel pipe and reinforcing bar are all built in concrete.

Wherein: described steel pipe is located at the centre of concrete column, and reinforcing bar is positioned on four angles of the steel pipe outside, concrete column.

Advantage of the present utility model and good effect are:

1. bearing capacity height, anti-seismic performance are strong.Steel pipe of the present utility model is located in the concrete column, and the steel pipe outside is provided with reinforcing bar, and steel pipe and reinforcing bar provide effect of contraction to concrete respectively, bearing capacity, anti-seismic performance and the ductility of concrete column have been improved, thereby reduce the sectional dimension of post, increase usable floor area, be beneficial to the earthquake zone seismic design.

2. little, the convenient construction of diameter of steel tube.The utility model can reduce the diameter of steel pipe after reasonably selecting reinforcing bar, handled easily when construction.

Description of drawings

Fig. 1 is the schematic cross-section of existing steel reinforced concrete structure open web type combined steel and concrete column;

Fig. 2 is the schematic cross-section of existing encased structures concrete filled steel tube coupled column;

Fig. 3 is the schematic cross-section of existing steel frame-steel pipe concrete combination column;

Fig. 4 is a schematic cross-section of the present utility model.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 4, the utility model comprises reinforcing bar 4 and steel pipe 3, in the centre of concrete column steel pipe 3 is set, arranged outside reinforcing bar 4 at steel pipe 3, reinforcing bar 4 is positioned on four angles of concrete column, and last concreting makes steel pipe 3 and reinforcing bar 4 place concrete.

Steel pipe 3 of the present utility model and reinforcing bar 4 provide effect of contraction to concrete respectively, therefore can improve its bearing capacity and anti-seismic performance, also can improve ductility simultaneously, thereby reduce the sectional dimension of post, increase usable floor area, are beneficial to the earthquake zone seismic design.In addition, after reasonably selecting reinforcing bar 4, can reduce the diameter of steel pipe 3, be convenient to construction.

Claims

1. a reinforcing bar-steel core concrete column comprises reinforcing bar and steel pipe, and both all are located in the concrete column, it is characterized in that: the outside of described steel pipe (3) is provided with reinforcing bar (4), and steel pipe (3) and reinforcing bar (4) are all built in concrete.

2. by the described reinforcing bar-steel core concrete column of claim 1, it is characterized in that: described steel pipe (3) is located at the centre of concrete column, and reinforcing bar (4) is positioned on four angles of steel pipe (3) outside, concrete column.