CN202544241U

CN202544241U - Irregular steel pipe concrete column with limiting pulling rod

Info

Publication number: CN202544241U
Application number: CN201220008976XU
Authority: CN
Inventors: 李俊华; 唐跃锋; 王国锋; 邱栋梁
Original assignee: Ningbo University
Current assignee: Ningbo University
Priority date: 2012-01-10
Filing date: 2012-01-10
Publication date: 2012-11-21
Anticipated expiration: 2022-01-10

Abstract

The utility model provides an irregular steel pipe concrete column with a limiting pulling rod. The irregular steel pipe concrete column comprises an irregular steel pipe, wherein, concrete is filled in irregular steel pipe; a plurality of limiting pulling rods are arranged along the direction of the long side of the irregular steel pipe; and the irregular steel pipe concrete column is characterized in that the limiting pulling rods are the prestressed limiting pulling rods comprising high-strength bolt pairs with performance rating of 8.8 or 10.9; the bolt pairs comprise screws and caps; the irregular steel pipe is provided with screw holes, and the screws pass through the screw holes to be screwed with the caps; and gaskets are respectively arranged between the cap ends of the screws and the steel pipe wall of the irregular steel pipe as well as the caps and the steel pipe wall of the irregular steel pipe. The irregular steel pipe concrete column has the advantages that the prestressed limiting pulling rods are adopted and can be pre-pulled to generate a transverse pre-pressing force in the steel pipe wall and the core concrete before a component bears the load, thus the driven limitation can be transformed into the drive limitation to the steel pipe wall and the concrete, and the effects of the steel pipe and the concrete can be performed to the maximum, and as a result, the mechanical property of the steel pipe concrete column can be further improved.

Description

A kind of belt restraining pull bar special-shaped steel pipe concrete post

Technical field

The utility model relates to the Structural Engineering field in the civil engineering, especially relates to a kind of belt restraining pull bar special-shaped steel pipe concrete post.

Background technology

Steel core concrete column is because its good stress performance applied more and more in high level, super-high building structure.Compare with square steel tube concrete column with traditional circle; Odd-shaped cross section steel core concrete columns such as rectangle, L shaped, T shape, cross can satisfy the architectural plane arrangement requirement better; Effectively avoid the post angle to expose, increase the house and use headroom, therefore in the many engineerings of China, progressively obtained application.Yet in the special-shaped steel pipe concrete posts such as rectangle, L shaped, T shape, cross; Steel pipe walls is not so good as the round steel pipe concrete column to the effect of contraction that core concrete can provide; Profile iron pipe range limit under the load action is because flakiness ratio is relatively large; Cripling takes place more easily, so the bearing capacity of special-shaped steel pipe concrete post and ductility all are not so good as the round steel pipe concrete column.In order to improve the mechanical property of special-shaped steel pipe concrete post, there is the scholar to propose to form belt restraining pull bar steel core concrete column at the every layout constraints pull bar across a certain distance of member long side direction.Research shows, the layout of this binding bar can effectively delay the cripling of steel pipe walls, improves steel pipe walls to concrete effect of restraint, improves bearing of component and ductility, is the effective way of improving special-shaped steel pipe concrete post stress performance.

But common binding bar is a kind of passive bound to this effect of contraction of steel pipe walls and core concrete; Has only competence exertion effect after member produces certain expansion and lateral deformation; Can not bring into play steel pipe and concrete effect in maximum limit ground; Thereby make steel core concrete column at the stressed initial stage, be prone to deform, reduce its bearing capacity.

Summary of the invention

The utility model technical problem to be solved provides a kind of steel core concrete column avoided with the prestressing force binding bar at the stressed initial stage, deforms, and the stress performance that reduces its bearing capacity is good, the binding bar special-shaped steel pipe concrete post of easy construction.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of belt restraining pull bar special-shaped steel pipe concrete post; Comprise chapped pipe; Be filled with concrete in the described chapped pipe; The long side direction of described chapped pipe is provided with several binding bars, and described binding bar is the prestressing force binding bar.

Described prestressing force binding bar do as one likes can grade be secondary composition of high-strength bolt of 8.8 grades or 10.9 grades; Described bolt pair comprises screw rod and nut; Described chapped pipe is provided with the screw rod duct, and described screw rod passes described screw rod duct and described nut bolt.

Be respectively arranged with pad between the cap end of described screw rod and the steel pipe walls of described chapped pipe and between the steel pipe walls of described nut and described chapped pipe, further increase bearing capacity.

The diameter in described screw rod duct is than the big 1-2 millimeter of diameter of described screw rod.

Described chapped pipe comprises rectangular steel pipe, L shaped steel pipe, teeprofile and cross steel pipe.

Compared with prior art, the advantage of the utility model is:

(1) improves bearing of component.The said prestressing force binding bar of the utility model at the stressed initial stage of special-shaped steel pipe concrete post, just can provide lateral support to steel pipe walls, can effectively prevent the cripling of steel pipe walls, thereby improves the bearing capacity of special-shaped steel pipe concrete post.

(2) improve the deformation of members ability.The said prestressing force binding bar of the utility model plays the prestressing force stirrup, at the stressed initial stage of special-shaped steel pipe concrete post, just to steel pipe inner core concrete initiatively constraint is provided, and effectively improves concrete intensity and ultimate deformation ability.

(3) reduce axial deformation under the member peak value load, improve the rigidity in early stage of member.The said prestressing force binding bar of the utility model, at the stressed initial stage of special-shaped steel pipe concrete post, the active constraint to steel pipe inner core concrete provides will reduce the axial deformation under the special-shaped steel pipe concrete post peak value load, improve the rigidity in early stage of member.

(4) easy construction.The said band prestressing force of the utility model binding bar special-shaped steel pipe concrete post; Its prestressing force binding bar is that high-strength bolt is secondary; Before the member load-bearing; In screw rod, produce pretension through tightening the secondary nut of high-strength bolt, by the pretension of screw rod steel pipe walls and core concrete are carried out precompressed, work progress makes things convenient for.

In sum; A kind of belt restraining pull bar of the utility model special-shaped steel pipe concrete post is drawn together different in nature steel core concrete column and prestressing force binding bar, adopts the prestressing force binding bar; Promptly before the member load-bearing; In steel pipe walls and core concrete, produce horizontal precompression thereby binding bar is carried out prestretching, then can this passive bound be changed into steel pipe walls and concrete active constraint, maximum limit ground performance steel pipe and concrete effect; Further improve the mechanical property of steel core concrete column, for the application of band prestressing force binding bar special-shaped steel pipe concrete post in building structure field provides technical support.

Description of drawings

Fig. 1 is the utility model band prestressing force binding bar rectangular steel-tube concrete column elevation;

Fig. 2 is the cross section cut-away view of Fig. 1;

Fig. 3 is the L shaped steel core concrete column elevation of the utility model band prestressing force binding bar;

Fig. 4 is the cross section cut-away view of Fig. 3;

Fig. 5 is the utility model band prestressing force binding bar teeprofile concrete column elevation;

Fig. 6 is the cross section cut-away view of Fig. 5;

Fig. 7 is the utility model band prestressing force binding bar cross steel core concrete column elevation;

Fig. 8 is the cross section cut-away view of Fig. 7.

Among the figure: 1, chapped pipe; 2, concrete; 3, screw rod; 4, nut; 5, pad.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Specific embodiment

A kind of belt restraining pull bar of the utility model special-shaped steel pipe concrete post comprises chapped pipe 1, is filled with concrete 2 in the chapped pipe 1, and vertical long side direction of chapped pipe 1 is provided with 3 binding bars, and binding bar is the prestressing force binding bar.

In this specific embodiment, prestressing force binding bar do as one likes can grade be secondary composition of high-strength bolt of 8.8 grades or 10.9 grades, and the bolt pair comprises screw rod 3 and nut 4, and chapped pipe 1 is provided with the screw rod duct, and screw rod 3 passes screw rod duct and nut 4 bolts; Be respectively arranged with pad 5 between the cap end of screw rod 3 and the steel pipe walls of chapped pipe 1 and between the steel pipe walls of nut 4 and chapped pipe 1; The diameter in screw rod duct is than the big 1-2 millimeter of diameter of screw rod 3; Chapped pipe 1 comprises rectangular steel pipe (as shown in Figure 1), L shaped steel pipe (as shown in Figure 2), teeprofile (as shown in Figure 3) and cross steel pipe (as shown in Figure 4).Wherein the number of binding bar is except that 3, can also for 4,5,6 or the like several.

Preparation method

At first 4 block plates are welded into the chapped pipe 1 among Fig. 1, Fig. 2, Fig. 3 or Fig. 4, before the welding the local machine drilling of binding bar are being set, the aperture is looked screw rod 3 diameters and is decided, and than screw rod 3 big 1-2 millimeters, forms the screw rod duct; Fluid concrete 2 in the steel pipe walls of chapped pipe 1 then; With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4; Before fluid concrete 2; Earlier insert round steel or plastic round tube at place, screw rod duct, in the steel pipe walls of the diameter of round steel or plastic round tube and chapped pipe 1 diameter in screw rod duct about equally, then fluid concrete 2; After treating that concrete 2 intensity reach certain value, round steel or plastic round tube are extracted; Penetrate high-strength screw rod 3 from the screw rod duct and link to each other with nut 4, shimming 5 respectively between the steel pipe walls of the cap end of screw rod 3 and the steel pipe walls of chapped pipe 1 and nut 4 and chapped pipe 1 gets final product through special-purpose torque wrench tightening nuts 4.According to different force requests, the quantity of prestressing force binding bar and vertical, horizontal spacing scalable on the tube wall of chapped pipe 1.

Claims

1. belt restraining pull bar special-shaped steel pipe concrete post; Comprise chapped pipe; Be filled with concrete in the described chapped pipe, the long side direction of described chapped pipe is provided with several binding bars, it is characterized in that: described binding bar is the prestressing force binding bar.

2. a kind of belt restraining pull bar special-shaped steel pipe concrete post according to claim 1; It is characterized in that: described prestressing force binding bar do as one likes can grade be secondary composition of high-strength bolt of 8.8 grades or 10.9 grades; Described bolt pair comprises screw rod and nut; Described chapped pipe is provided with the screw rod duct, and described screw rod passes described screw rod duct and described nut bolt.

3. a kind of belt restraining pull bar special-shaped steel pipe concrete post according to claim 2 is characterized in that: be respectively arranged with pad between the cap end of described screw rod and the steel pipe walls of described chapped pipe and between the steel pipe walls of described nut and described chapped pipe.

4. a kind of belt restraining pull bar special-shaped steel pipe concrete post according to claim 2 is characterized in that: the diameter in described screw rod duct is than the big 1-2 millimeter of diameter of described screw rod.

5. a kind of belt restraining pull bar special-shaped steel pipe concrete post according to claim 1, it is characterized in that: described chapped pipe comprises rectangular steel pipe, L shaped steel pipe, teeprofile and cross steel pipe.