CN103206042A

CN103206042A - PVC (polyvinyl chloride) pipe constrained and rectangular stirrup hooped reinforced concrete combined column

Info

Publication number: CN103206042A
Application number: CN2013100862935A
Authority: CN
Inventors: 陈宗平; 徐金俊; 薛建阳
Original assignee: Guangxi University
Current assignee: Guangxi University
Priority date: 2013-03-18
Filing date: 2013-03-18
Publication date: 2013-07-17

Abstract

The invention discloses a PVC (polyvinyl chloride) pipe constrained and rectangular stirrup hooped reinforced concrete combined column which comprises a PVC round plastic pipe, longitudinal rebars, rectangular stirrups and concrete. The combined column is formed by forming a rectangular rebar cage framework by binding the longitudinal rebars with the rectangular stirrups, embedding the rebar cage framework at the center of the section of the PVC round pipe, and pouring the concrete in rest space of the section of the combined column. By the PVC sleeve technology, constraint effect, on inside concrete, of the reinforcement concrete column with the rectangular stirrups hooped is improved, the PVC sleeve and a rectangular rebar cage are constrained in the concrete in a combined manner, multiple constraint mechanisms can be formed, and axial compression capability of the combined column is further improved; the externally-wrapped PVC pipe can improve durability of the concrete column, consumption of steel can be reduced while requirements of bearing capability are met, and the PVC material is low in price, so that manufacturing cost can be lowered.

Description

The steel concrete coupled column of rectangle hoop is joined in the pvc pipe constraint

Technical field

The present invention relates to join reinforced concrete post and pvc pipe concrete and the combining structure post thereof of rectangle hoop, particularly the steel concrete coupled column of rectangle hoop is joined in the pvc pipe constraint.

Background technology

Along with modern high-rise, stride and the development of heavy structure greatly, in order to satisfy the demand of overall structure load-carrying properties, traditional reinforced concrete structure certainly will will strengthen the sectional dimension of member, and the consequence that so causes namely is that the deadweight of structure increases, and strengthens the earthquake response of works therefrom.Particularly as the pillar of load-bearing, the height of its bearing capacity has determined the performance of various functions of use on it, as the layout design of building building roof load; Simultaneously, in order to satisfy the demand of architectural space, the sectional dimension that reduces pillar is a kind of valid approach.Therefore, this with regard to require to seek a kind of supporting capacity height, structural column that comprehensive cost is low satisfies the demand.

At present, the researcher has proposed the good new structure-encased structures of a kind of supporting capacity both at home and abroad, its characteristics are that the steel pipe of outsourcing retrains inner concrete effectively, thereby make mechanical properties of concrete improve, not only supporting capacity strengthens greatly, and causes the anti-seismic performance of pillar also to be improved because the Gao Peigang in cross section leads.To join the influence of steel rate bigger but this class formation is subjected to the cross section, be that the cross section steel ratio is when big, the supporting capacity of concrete filled steel tube and anti-earthquake ductility improve bigger, and at the middle-high building structure, adopt above-mentioned steel core concrete column just to increase consumption and the construction cost of steel greatly.In order to reduce cost and to save steel, national correlation department has just proposed the policy of " to mould Dai Gang " very early, encourages Construction unit's energetic of plastics pipes material in civil works.

Polyvinyl chloride (PVC) tubing is widely used in the facilities such as rain (falling) water pipe and underground sewage pipe, because it has light weight, inexpensive, characteristic such as corrosion resistance is good, the range of application of pvc pipe will be more and more widely.Similar to concrete filled steel tube, concrete and pvc pipe material are combined, thereby constitute the pvc pipe concrete, partly or entirely replace concrete filled steel tube, reach the purpose of saving steel, reducing comprehensive cost with this.Given this, be necessary to design a kind of new member combined method, the pvc pipe concrete is combined effectively with reinforced concrete post, reach the bearing capacity that improves pillar, the purpose of saving construction cost with this.

Summary of the invention

The technical problem to be solved in the present invention provide a kind ofly strengthen load-carrying properties, reduce the member section size or reduce consumption, the inner endurance performance of concrete of steel good, the quality price ratio arranged, be beneficial to the steel concrete coupled column that rectangle hoop is joined in the pvc pipe constraint of saving construction cost.

The present invention solves the problems of the technologies described above with following technical scheme:

The steel concrete coupled column of rectangle hoop is joined in a kind of pvc pipe constraint, comprise PVC round plastic tubing, longitudinal reinforcement, rectangle hoop and a concrete, it is characterized in that longitudinal reinforcement is by the orthogonal reinforcement cage skeleton of rectangle hoop colligation, reinforcement cage skeleton is nested in the kernel of section of PVC pipe, concreting in the remaining space in coupled column cross section.

The rectangle reinforcement cage skeleton is formed according to certain stirrup spacing colligation by rectangle hoop by longitudinal reinforcement, four bight configuration longitudinal reinforcements in rectangle reinforcing cage cross section, and can increase longitudinal reinforcement quantity on all the other limits in cross section according to the needs of load-carrying properties.

The rectangle reinforcing cage is nested in the middle part of pvc pipe, and both geometric centers coincide with a bit.

The concrete of building is ordinary concrete, and its compound method is with China's related specifications standard.

Coupled column is had favorable durability energy and load-carrying properties by the pvc pipe outsourcing.

Adopt technique scheme, make the present invention have following advantage with respect to prior art:

1) application of PVC sleeve technology, can improve join rectangle hoop reinforced concrete post to the concrete binding effect in inside;

2) application of PVC sleeve technology is united the inherent concrete of constraint with the rectangle reinforcing cage, can form multiple constraint mechanism, further strengthens the axial compression ability of coupled column, improves its ductility character;

3) pvc pipe of outsourcing can improve the endurance quality of concrete column itself, and can be used as the template when constructing;

4) under the prerequisite that satisfies the supporting capacity demand, can reduce the use of steel, the PVC material price is cheap, can reduce cost thus.

Description of drawings

Fig. 1 joins the cross sectional representation of the steel concrete coupled column of rectangle hoop for the pvc pipe constraint;

Fig. 2 retrains the space schematic diagram of each combiner of the steel concrete coupled column of joining rectangle hoop for pvc pipe.

The specific embodiment

The steel concrete coupled column of rectangle hoop is joined in the pvc pipe constraint, adopts the enhancing technology of cover cage in the pipe, by reasonable coupling pvc pipe caliber, reaches the purpose of strong its inner concrete of constraint, strengthens the load-carrying properties of coupled column.Under the situation that does not reduce supporting capacity, compare with original reinforced concrete post of joining rectangle hoop, the present invention can reduce the member section size or reduce the consumption of steel; And the pvc pipe material with respect to steel have inexpensive, be difficult for getting rusty, the characteristics that corrosion resistance is good are under the protection of the pvc pipe of outsourcing; inner concrete has the favorable durability energy; simultaneously can reduce construction formwork, reach the purpose of quality price ratio, be conducive to save construction cost.

Used pvc pipe is for adopting polyvinyl chloride (Poly Vinyl Chloride, PVC) as the circular pipe of material, good characteristics such as its material has that processing characteristics is good, low cost of manufacture, corrosion-resistant, insulation, and PVC has good relatively geometrical stability.Generally speaking, pvc pipe has the better physical mechanical property, its tensile yield strength 〉=40MPa, and modulus of elasticity is about 2749MPa.

Used concrete is ordinary concrete, and its compound method is with China's related specifications standard.

Below in conjunction with accompanying drawing and engineering reality concrete enforcement of the present invention is further described.

Shown in Fig. 1～2, the steel concrete coupled column of rectangle hoop is joined in the pvc pipe constraint, comprises PVC pipe 1, longitudinal reinforcement 2, rectangle hoop 3, concrete 4.

When the combinations thereof post is the bottom column of building structure or beneath which floor post, the load (comprising a power, shearing and moment of flexure) that transmits because of top is bigger, particularly axial force is to the influence of column cross-section size, and in order to satisfy the requirement of the required limit value of axial compression ratio of building structure aseismatic, necessarily require column section to have high supporting capacity.A kind of effective means that improves bearing capacity is by enlarging the pvc pipe caliber, increases the pvc pipe concrete section to the area ratio in the steel concrete cross section of joining rectangle hoop.

When the combinations thereof post is top which floor structural column of building structure, because upper load is less relatively, consider suitable saving concrete material and reduce construction cost, can reduce column cross-section size along the building height direction, can satisfy requirement for bearing capacity by following two kinds of means: 1) when reducing column cross-section size, increase pvc pipe concrete section ratio relatively with the size that reduces the rectangle reinforcing cage morely; 2) in order to consider easy construction, under the prerequisite that does not change rectangle reinforcing cage size, can suitably reduce the bearing capacity in cross section by the way of dwindling the pvc pipe caliber.

The construction technology that the steel concrete coupled column of rectangle hoop is joined in the pvc pipe constraint is:

ⅰ, with certain hoop spacing of joining longitudinal reinforcement 2 colligations are become a reinforcement cage skeleton by rectangle hoop 3;

ⅱ, reinforcement cage skeleton is nested in the kernel of section of PVC pipe 1, concreting 4 in the remaining space in described cross section, thereby form the steel concrete coupled column that rectangle hoop is joined in the pvc pipe constraint.

Claims

1.PVC the steel concrete coupled column of rectangle hoop is joined in the pipe constraint, comprise PVC round plastic tubing, longitudinal reinforcement, rectangle hoop and a concrete, it is characterized in that longitudinal reinforcement is by the orthogonal reinforcement cage skeleton of rectangle hoop colligation, reinforcement cage skeleton is nested in the kernel of section of PVC pipe, concreting in the remaining space in coupled column cross section.

2. the steel concrete coupled column of rectangle hoop is joined in pvc pipe constraint as claimed in claim 1, it is characterized in that the rectangle reinforcement cage skeleton is formed according to certain stirrup spacing colligation by rectangle hoop by longitudinal reinforcement, four bight configuration longitudinal reinforcements in rectangle reinforcing cage cross section, and can increase longitudinal reinforcement quantity on all the other limits in cross section according to the needs of load-carrying properties.

3. the steel concrete coupled column of rectangle hoop is joined in pvc pipe constraint as claimed in claim 1, it is characterized in that the rectangle reinforcing cage is nested in the middle part of pvc pipe, and both geometric centers coincide with a bit.

4. the steel concrete coupled column of rectangle hoop is joined in pvc pipe constraint as claimed in claim 1, it is characterized in that the concrete of building is ordinary concrete, and its compound method is with China's related specifications standard.

5. the steel concrete coupled column of rectangle hoop is joined in pvc pipe constraint as claimed in claim 1, it is characterized in that coupled column by the pvc pipe outsourcing, has favorable durability energy and load-carrying properties.