CN104405082A

CN104405082A - Steel rib-steel pipe regenerated-concrete combined column with cross-shaped section

Info

Publication number: CN104405082A
Application number: CN201410613170.7A
Authority: CN
Inventors: 徐亚丰; 朱绍杰; 王越; 吕丛丛; 陈谦; 翟章琳
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2014-11-05
Filing date: 2014-11-05
Publication date: 2015-03-11

Abstract

A related steel rib-steel pipe regenerated-concrete combined column with a cross-shaped section is composed of a steel rib, a steel pipe, a steel skeleton and concrete; the steel rib is formed by welding steel plates, and is disposed on a limb of the cross-shaped column formed by stirrups in a circle; the steel pipe is at the core of the cross-shaped column; concrete is regenerated concrete and is at the interior and the exterior of the steel pipe and the interior of the cross-shaped column limb formed by stirrups in a circle; the steel rib is T-shaped by welding the steel plates; and corners of the cross-shaped column formed by stirrups in a circle are provided with vertical steel bars. Due to the fact that the regenerated concrete is at the interior and the exterior of the steel pipe, resource is saved and environment is protected. The steel skeleton constrains concrete and enhances the bearing capability of the column. The combined column is a main member of a framework structure of high-rise and wide-span buildings, and has the characteristics of high bearing capacity, high rigidity, light weight, good plasticity and toughness, good impact resistance and fatigue resistance, excellent earthquake-proof performance, good endurance, energy saving, environment friendliness and the like.

Description

Steel frame-steel pipe regeneration concrete star section coupled column

Technical field

Having the present invention relates to a kind of concrete component, particularly related to a kind of for the concrete cross section column in civil engineering, is a kind of novel star section coupled column.

Background technology

Current social, along with the lifting of expanding economy and Living consumption, the requirement of people to house is more and more higher, especially more and more payes attention to building structure and room layout.Sectional dimension due to common concrete column is often greater than the thickness of body of wall, have impact on the use of the interior space, is difficult to meet building requirement attractive in appearance.In order to address this problem, there is the form of structure of R. C. Cross Shape Column.The advantage of R. C. Cross Shape Column structural system is more outstanding, and scholar both domestic and external, expert are to this has been extensive, deep research.The theoretical system of R. C. Cross Shape Column basically forms, and the provinces and cities such as such as Tianjin, Shenyang, Guangdong, Shanxi have completed writing of local code, and and guide in engineering practice, building area reaches tens million of square metres.

But along with the development of Super High and long span building structure, the shortcoming of pure R. C. Cross Shape Column is more and more outstanding.As being subject to the restriction of ratio of axial compressive force to axial compressive ultimate capacity of section, if still adopt ordinary reinforced concrete cross section column under larger load, the sectional dimension of post will be caused very large; The limb length of cross section column cannot be oversize, easily can produce shear lag phenomenon after post limb is long, and therefore usual length by the limb of cross section column is extended the deadline in certain proportion with limb; Cross section column there occurs change due to section form, causes its mechanical characteristic also to there occurs change, and compared with ordinary rectangular post, supporting capacity and ductility decline all to some extent, and anti-seismic performance is unsatisfactory.

Simultaneously, in the present circumstance, the whole nation just has 1,360 ten thousand tons from the waste concrete in the building waste that old building removes every year, add the waste concrete that the building waste that annual newly constructed house produces 4,000 ten thousand tons produces, its huge disposal cost and the environmental problem caused thus also very outstanding.In order to reduce the exploitation to natural resource to greatest extent, must increase to greatest extent construction refuse regenerated utilization.Therefore the investigation and application of the process of building waste and application technology promote imperative.But, at present due to the inherence damage of regeneration aggregate and due to its adsorption the old mortar of one deck and the water absorption rate that causes is large, the intensity of the regeneration concrete causing it to be made into, comparatively ordinary concrete is poor for shrinkage and endurance quality etc., significantly limit its scope of application.

Therefore, herein under above-mentioned background, in order to promote the utilization of regeneration concrete, by analyzing the achievement in research in early stage, propose a kind of novel steel frame-steel pipe regeneration concrete star section coupled column, this kind of coupled column combines the advantage of R. C. Cross Shape Column, steel core concrete column, combined steel and concrete column, regeneration concrete post, alleviates resource pressure and environmental pressure, widen the application and development space of concrete cross section column greatly, there is very important Research Significance.

Summary of the invention

The object of this invention is to provide a kind of steel frame-steel pipe regeneration concrete star section coupled column; this Novel combined column not only improves the stress performance of ordinary reinforced concrete cross section column; and take full advantage of discarded concrete; accomplish effective utilization of refuse; save resource, protect environment.The present invention is achieved through the following technical solutions: the T steel bone of steel frame-steel pipe regeneration concrete star section coupled column is formed by Plate Welding, be positioned on the limb of cross section column, steel pipe is positioned at the center of post, first reinforcing bar and steel pipe are connected and fixed by welding or bolt when test specimen makes, then assembling reinforcement skeleton, formwork, builds regeneration concrete.It is characterized in that: the reinforcing bar be positioned on cross section column limb improves the stress performance in limb portion; The steel pipe being positioned at core place improves supporting capacity and the ductility of cross section column; Make full use of discarded building waste, form regeneration concrete, accomplish twice laid, energy conservation, environmental protection.

Advantage of the present invention and effect are:

1. make full use of discarded building waste, form regeneration concrete, accomplish twice laid, energy conservation, environmental protection;

2. steel pipe is positioned at the inside of direction concrete crossover sites in length and breadth, is subject to the protection of outer concrete, has good fire-resistant, decay resistance;

3. steel pipe inner concrete is in three-phase pressured state, improve the ultimate bearing capacity of pillar, is the application exhaust space of high-strength concrete;

4. reinforcing bar is positioned at the limb portion of cross section column, improves the stress performance in limb portion;

5. can first construct reinforcing bar, steel pipe, reinforcing bar, steel pipe are connected and fixed at bottom welding or bolt, then muscle and stirrup are indulged in colligation, pour into a mould regeneration concrete after forming skeleton, thus form superposed column;

7., because the existence of reinforcing bar, steel pipe improves the ductility of post, improve the ultimate bearing capacity of post, be conducive to earthquake zone seismic design;

8. widen the application and development space of concrete cross section column, beautify architectural appearance.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of steel frame-steel pipe regeneration concrete star section coupled column.

In figure: 1 is longitudinal reinforcement, 2 is regeneration concrete, and 3 is steel pipe, and 4 is stirrup, and 5 is reinforcing bar.

Detailed description of the invention

Steel frame-steel pipe regeneration concrete star section coupled column, be made up of reinforcing bar, steel pipe, cage of reinforcement and concrete, reinforcing bar 5 is formed by Plate Welding, reinforcing bar 5 is positioned on the limb of the cross section column that stirrup 4 surrounds, steel pipe 3 is positioned at the core of cross section column, concrete 2 is regeneration concretes, regeneration concrete 2 be positioned at steel pipe 3 inside and outside, bind round the cross section column that 4 muscle surround.Reinforcing bar becomes T-shaped by Plate Welding.Longitudinal reinforcement 1 is equipped with at the angle of the cross section column that stirrup 4 surrounds.

Concrete technology is as follows:

1. according to the rules Plate Welding is become reinforcing bar;

2. reinforcing bar and steel-pipe welding or bolt are connected and fixed, and keep vertical or certain angle;

3. assembling reinforcement skeleton;

4. in cage of reinforcement lateral branch template;

5. the regeneration concrete fragment of certain proportion, certain size and cement etc. are fully stirred, form regeneration concrete;

6. pour into a mould regeneration concrete;

7. periodic maintenance;

8. arrive regulation maintenance day after date, form removal is shaping.

Claims

1. steel frame-steel pipe regeneration concrete star section coupled column, be made up of reinforcing bar, steel pipe, cage of reinforcement and concrete, it is characterized in that: reinforcing bar (5) is formed by Plate Welding, reinforcing bar (5) is positioned on the limb of the cross section column that stirrup (4) surrounds, steel pipe (3) is positioned at the core of cross section column, concrete is regeneration concrete, the cross section column that inside and outside, stirrup (4) that regeneration concrete (2) is positioned at steel pipe (3) surround.

2. the steel frame-steel pipe regeneration concrete star section coupled column according to right 1, is characterized in that: reinforcing bar (5) becomes T-shaped by Plate Welding.

3. the steel frame-steel pipe regeneration concrete star section coupled column according to right 1, is characterized in that: longitudinal reinforcement (1) is equipped with at the angle of the cross section column that stirrup (4) surrounds.