CN103015630A

CN103015630A - Built-in polyvinyl chloride (PVC) pipe enhanced steel-encased concrete combined column

Info

Publication number: CN103015630A
Application number: CN2012105385815A
Authority: CN
Inventors: 徐金俊; 陈宗平; 薛建阳
Original assignee: Guangxi University
Current assignee: Guangxi University
Priority date: 2012-12-13
Filing date: 2012-12-13
Publication date: 2013-04-03

Abstract

The invention discloses a built-in polyvinyl chloride (PVC) pipe enhanced steel-encased concrete combined column, which comprises PVC pipe concrete, longitudinal angle steel, connection steel lacing bars and common concrete, wherein the PVC pipe concrete is buried in the center of the section of the steel-encased concrete combined column; each piece of longitudinal angle steel is arranged at each corner of the column; the longitudinal angle steel is connected through the connection steel lacing bars; and the concrete is grouted into a residual space on the section of the mixed column. By the PVC pipe concrete, the steel-encased concrete combined column has the outstanding advantages that the bearing capacity of the general common concrete column and the durability of the concrete can be improved; invasion of harmful substances to the structural column in a severe environment is effectively prevented; the cost is low; and the using amount of steel and the manufacturing cost can be saved. Compared with the profile steel concrete column or the steel pipe concrete column, the built-in PVC pipe enhanced reinforced concrete combined column has the advantages that the steel consumption can be greatly reduced; compared with steel, the PVC pipe has the characteristics of low cost, difficulty in rusting, high corrosion resistance and high durability; the cost performance is high; and the construction cost is greatly saved.

Description

A kind of built-in pvc pipe strengthens the Covered with Angles concrete combination column

Technical field

The present invention relates to Steel concrete combining structure and combination construction, particularly a kind of built-in pvc pipe and strengthen the Covered with Angles concrete combination column.

Background technology

Along with modern high-rise, stride and the development of heavy structure greatly, in order to satisfy the needs of overall structure bearing capacity, traditional reinforced concrete structure certainly will will strengthen the sectional dimension of member, the consequence that causes is that the deadweight of structure increases, and strengthens therefrom earthquake response.Particularly as the pillar of load-bearing, the height of its bearing capacity has determined the performance of various functions on it, such as the design arrangement 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 effective approach.Therefore, this is that supporting capacity is high, good structural column satisfies the demand to be anti-earthquake ductility again with regard to requiring to seek a kind of.

At present, both at home and abroad the researcher has proposed that a kind of supporting capacity is good, the new structure-encased structures of excellent earthquake resistance, its characteristics are that the steel pipe of outsourcing retrains inner concrete effectively, thereby so that concrete mechanical property improves, not only supporting capacity improves greatly, and because the Gao Peigang in cross section leads the ductility of pillar is improved.But this class formation is subject to the cross section, and to join the impact of steel rate larger, and when the cross section steel ratio was large, the supporting capacity of concrete filled steel tube and anti-earthquake ductility improved larger, but have also greatly increased the consumption of steel and improved construction cost.In order to reduce cost and saving 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 to be used for 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 the characteristics such as light weight, inexpensive, corrosion resistance is good, the range of application of pvc pipe will be more and more extensive.Similar to concrete filled steel tube, concrete and pvc pipe material are combined, thereby consist of the pvc pipe concrete, partly or entirely replace concrete filled steel tube, reach the purpose of saving steel with this.

In the combining structure field, the Covered with Angles concrete structure technique is a kind of design of building structures and reinforcing technique of newly-developed, is characterized in having higher bearing capacity, good anti-earthquake ductility, and the Covered with Angles concrete column is easy to be connected with Vierendeel girder, has easily advantage of joint structure.Given this, be necessary to design a kind of new Component composition method, the pvc pipe concrete is combined effectively with the Covered with Angles concrete column, make it not only to reach the purpose that improves the pillar bearing capacity, satisfy again its ductility demand simultaneously.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of built-in pvc pipe and strengthens the Covered with Angles concrete combination column, carries out double constraints by the core concrete to rectangular section column, thereby improves the supporting capacity of structural column, and satisfy its ductility demand.

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

A kind of built-in pvc pipe strengthens the Covered with Angles concrete combination column, it is characterized in that comprising a pvc pipe concrete, sole bar angle, connection steel lacing and ordinary concrete, the pvc pipe concrete is embedded in the center in Covered with Angles concrete column cross section, there is a sole bar angle at each angle of post, there is the steel of connection lacing to connect concreting in the remaining space in mixed column cross section between the sole bar angle.

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

The pvc pipe concrete is by the PVC pipe and water the concrete that is filled in the pipe and form.

Sole bar angle on four angles of structural column and be connected the stirrup skeleton that the steel lacing forms together bears the axial load in cross section with inherent concrete.

Adopt technical scheme of the present invention, following remarkable advantage arranged:

1) the concrete application of pvc pipe can improve the supporting capacity of concrete column;

2) pvc pipe wraps up a part of concrete, can improve concrete endurance quality, improves concrete long-term behaviour, can effectively prevent the erosion of structural column hazardous substances when poor environment;

3) the PVC material price is cheap, and the concrete application of pvc pipe has saving steel, reduces the advantage of cost;

4) the pvc pipe concrete is wrapped between the Covered with Angles concrete, can operative constraint should the inside pillar lateral deformation, further improve its supporting capacity, have the double constraints effect.

In the situation that do not reduce bearing capacity, compare with steel reinforced concrete (SRC) post or concrete filled steel tube (CFS) post, the present invention can greatly reduce the consumption of steel; And the pvc pipe material with respect to steel have inexpensive, be difficult for getting rusty, corrosion resistance is good, the characteristics of excellent in durability, and the high-quality cost performance is arranged, and saves a large amount of construction costs;

Description of drawings

Fig. 1 is the cross sectional representation that a kind of built-in pvc pipe strengthens the Covered with Angles concrete combination column;

Fig. 2 is the space schematic diagram that the built-in pvc pipe of Fig. 1 strengthens each combiner of Covered with Angles concrete combination column.

Among the figure: outside concrete 4 sole bar angles of the built-in concrete 3-of 1-PVC pipe 2-, the horizontal lacing of 5-

The specific embodiment

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

When coupled column is applied to the bottom column of little high level or highrise building or beneath which floor post, the load (comprising moment of flexure, shearing and axle power) that transmits because of top is larger, particularly axial force is on the impact 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.The effective means that improves bearing capacity mainly is by enlarging the pvc pipe caliber, the pvc pipe in the increase pvc pipe concrete and the Area Ratio of built-in concrete area sum and coupled column total cross-section.

When coupled column is the superstructure post of certain building, because upper load less, consider suitable saving concrete material and reducing construction cost, can suitably reduce column cross-section size along the building height direction, can satisfy requirement for bearing capacity by following means: 1) when more reducing column cross-section size, can relatively increase pvc pipe concrete section ratio; 2) reduce simultaneously the physical dimension of little column section and coupled column total cross-section, but each several part cross section ratio can remain unchanged.If the consideration easy construction, under the prerequisite that does not change column cross-section size, can suitably reduce by the way of dwindling the pvc pipe caliber bearing capacity in cross section.

The construction technology that built-in pvc pipe strengthens the Covered with Angles concrete combination column is:

I is to pvc pipe material 1 interior placing of concrete 2, thus formation pvc pipe concrete.The making of this pillar can be at the construction field (site) or specialized enterprises production.In order to improve construction speed and to strengthen concrete preparation, build and the reliability of maintenance, Carrying out Specialization production can effectively guarantee the intensity of its structure.

Ii adopts 5 colligations of connection steel lacing to become a stirrup skeleton sole bar angle 4, and satisfies certain steel ratio according to the requirement of column section.The layout width requirement of this stirrup skeleton is greater than the external diameter of pvc pipe 1, and satisfies certain spacing requirement, makes its more reasonable stress, has preferably effect of restraint.

Iii is embedded in pvc pipe concrete pillar at the center in coupled column cross section, all around behind the formwork in the remaining space in cross section concreting 3, strengthen the Covered with Angles concrete combination column thereby form built-in pvc pipe.

Claims

1. a built-in pvc pipe strengthens the Covered with Angles concrete combination column, it is characterized in that comprising a pvc pipe concrete, sole bar angle, connection steel lacing and ordinary concrete, the pvc pipe concrete is embedded in the center in Covered with Angles concrete column cross section, there is a sole bar angle at each angle of post, there is the steel of connection lacing to connect concreting in the remaining space in mixed column cross section between the sole bar angle.

2. built-in pvc pipe as claimed in claim 1 strengthens the Covered with Angles concrete combination column, it is characterized in that used concrete is ordinary concrete, and its compound method is with China's related specifications standard.

3. built-in pvc pipe as claimed in claim 1 strengthens the Covered with Angles concrete combination column, it is characterized in that the pvc pipe concrete by the PVC pipe and water the concrete that is filled in the pipe forming.

4. built-in pvc pipe as claimed in claim 1 strengthens the Covered with Angles concrete combination column, it is characterized in that sole bar angle and the stirrup skeleton that is connected steel lacing composition on four angles of structural column, together bears the axial load in cross section with inherent concrete.