CN2701931Y

CN2701931Y - Joint structure of concrete filled steel tubular column and floor beam

Info

Publication number: CN2701931Y
Application number: CN 200420042885
Authority: CN
Inventors: 蔡健; 陈庆军; 杨春
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2004-02-25
Filing date: 2004-02-25
Publication date: 2005-05-25
Anticipated expiration: 2014-02-25

Abstract

The utility model discloses a joint structure of concrete filled steel tubular column and floor beam, comprising a steel pipe concrete column, a floor beam and an annular concrete beam. The steel pipe concrete column of a vertical member is connected with the floor beam of a horizontal member at the joint and the steel tube is perforated at the joint region corresponding location to the floor beam for the beam longitudinal bar of the floor beam directly penetrating the steel pipe column. The annular concrete beam is arranged out of the steel pipe in the joint region and the reinforced bar in the annular concrete beam comprises a ring-beam annular longitudinal bar concentric with the steel pipe concrete column and a ring-beam hoop reinforcement radiate in radial direction. A reinforcing cage concentric with the steel tube is positioned in the steel pipe concrete column in the joint region, comprising a column joint longitudinal bar vertically placed and a column joint hoop reinforcement horizontally placed. The anchorage length of the reinforcing cage extended into the steel tube is determined by the diameter of the reinforcing bar. The utility model is suitable for the field of architectural engineering and has the advantages that it is convenient in operation and low cost, so it is convenient for generalization and application of the steel pipe concrete column.

Description

The node structure of a kind of steel core concrete column and building roof beam junction

Technical field

The utility model relates to building structure, the node structure of particularly a kind of steel core concrete column and building roof beam junction.

Background technology

Steel core concrete column as a kind of combining structure that has steel work and both advantages of concrete structure concurrently in application in engineering more and more widely, but node as one of part of the emphasis in the structure, stressed and construct problem, be not well solved yet, become " bottleneck " problem that the restriction steel core concrete column is used.

Existing steel core concrete column and building roof beam can be divided into two types of post steel pipe conitnuous forms and building roof beam conitnuous forms at the joint construction of node area.

1. the node of post steel pipe conitnuous forms:

Its main thought is: keep steel core concrete column to connect along overall height, building roof beam is connected with it from the post side.This has caused node all comparatively complicated and difficult in design, construction.

Its basic force-transmission mechanism is: mainly adopted bracket, and reinforcing ring, the concrete ring beam is worn the straight-through reinforcing bar of steel pipe, and forms such as grappling formula ground tackle are carried out the moment of flexure transmission.Shearing passes through reinforcing ring, the bearing pin bracket, and structural forms such as annular shear reinforcement are transmitted, and bonding between node area concrete and steel pipe walls and frictional force are also brought into play certain effect.

This category node form exists such or such shortcoming in actual applications, and subject matter is summarized as follows:

1) simplification of node mechanical property and construction, economy can not be satisfactory to both parties: some node type, as the reinforcing ring type node, mechanical property is good, the integral rigidity of node is also high, but material usage is big, construction is complicated; Some node type, as the grappling gusset-type joint, simple structure, easy construction, also than the material saving, but its mechanical property is unsatisfactory; Anti-shear ring ring beam joint and for example, its construction and advantage economically are very outstanding, but the rigidity of its node is limited, and the service behaviour under the complex stress situation is poor;

2) influence architectural appearance and use: the structure of the node of cast-in-situ floor beam slab often has with architectural appearance and function of use and conflicts, and cause the layout of superstructure beam slab dumb, girder system complicated layout as the twin beams node, and single beam joint makes the width of building roof beam excessive, not only increase dead load but also cause waste of material, and influence the attractive in appearance of superstructure;

3) application of node is dumb: at present applied node all only is applicable to conventional situation in the engineering, comparatively special superstructure is arranged, and as nonopiate girder system, the absolute altitude of each beam and square one not highly, its application just has been subjected to certain restriction.

2. the node of building roof beam conitnuous forms

Its main thought is: keep the continuity of concrete floor system, each floor covers at the bottom of the beam face of beam column junction and beam and is connected with steel pipe column.

This category node has solved the connectivity problem of building roof beam and steel core concrete column, but still has following problem:

1) the post steel pipe is not communicated with the transmission capacity that has weakened its shaft pressuring load significantly in node area, though the ring beam of being furnished with circumferential reinforcement by setting can solve the axial bearing capacity problem, axial deformation is bigger than normal, and it is bigger to the stressed influence of structural entity;

2) the moment of flexure transmission of the joint face of post steel pipe at the bottom of beam face, beam and shearing transmission capacity are poor, and corresponding structure is handled the complexity of the consumption and the structure that have increased material again;

3) the centering difficulty of last lower prop in the construction;

4) steel pipe needs every layer of lifting, fixing, and construction is not easy when using in super highrise building.

The utility model content

The purpose of this utility model is to provide the node structure of a kind of steel core concrete column and building roof beam junction, and its good economy performance, construction is convenient, power transmission is clear and definite, and steel pipe is at the node area opening.

The node structure of steel core concrete column of the present utility model and building roof beam junction as shown in the figure, Fig. 1 (a) is its sectional drawing when girder system is the quadrature system, Fig. 1 (b) is its plan view when girder system is the quadrature system, and Fig. 1 (c) is its plan view when girder system is nonopiate system.This node structure comprises steel core concrete column (1), building roof beam (7) and annular concrete roof beam (8).The steel core concrete column of vertical member (1) joins at the node place with the building roof beam (7) of horizontal member, and steel pipe makes the vertical muscle (6) of beam of building roof beam (7) can directly pass through steel pipe column in the position perforate of the corresponding building roof beam of node area (7); Steel pipe in node area is outside equipped with annular concrete roof beam (8), and the reinforcing bar of annular concrete roof beam (8) lining comprises with the vertical muscle (2) of the concentric ring beam of steel core concrete column (1) annular and radially is actiniform ring beam stirrup (3); Be provided with and the steel pipe bar cage concentric in node area steel core concrete column (1), it comprises that the post connection lengthwise rib (4) of vertical placement and the post of horizontal positioned are connected stirrup (5), and the anchorage length that reinforcing cage extends in steel pipe is decided on the diameter of reinforcing bar.

Described steel pipe tapping is provided with gauze wire cloth, to prevent the outflow of node area concrete.

The utility model can be realized by following technical measures: the continuous steel pipe column of multilayer is at node area and building roof beam (7) junction opening, make the vertical muscle (6) of beam of building roof beam (7) run through steel pipe column smoothly, guaranteed the continuity of steel pipe column and building roof beam (7) simultaneously.Building roof beam (7) duplicates to the internal force mode of node transmission and traditional reinforced concrete post node, and power transmission is direct, and mechanism is clear and definite.Because the steel pipe opening weakens the ultimate bearing capacity of joints decline that causes, outside the node area steel pipe, be provided with annular concrete roof beam (8) for fear of node area, node area retrained, guarantee the continuity of steel pipe axial bearing capacity by it; In order to make moment of flexure and smooth transmission shearing of steel pipe column, in the node area steel pipe, be provided with the continuity that reinforcing cage guarantees that the post moment of flexure is transmitted simultaneously.

The job practices flow chart of the node structure of steel core concrete column of the present utility model and building roof beam junction as shown in Figure 2, construction sequence is as follows:

1. the steel pipe column of single or multiple lift is lifted the place, pillar location on construction plane;

2. reinforcing bar cage hoisting is arrived steel pipe interior nodes position, drive fixing with beam;

3. the cage of reinforcement of the annular concrete roof beam that will tie up on vacant lot (8) is placed into the template the inside of annular concrete roof beam (8);

4. the vertical muscle (6) of the beam of building roof beam (7) is passed node area, colligation beam stirrup (9) is provided with gauze wire cloth at the steel pipe tapping and prevents the outflow of node area concrete;

5. steel pipe column is carried out concrete pouring, concreting is to node area;

6. after the steel pipe column concrete setting, the casting beams concrete.

Outstanding advantage of the present utility model and remarkable result are:

1. this node has well solved the be connected difficult problem of building roof beam with steel core concrete column, and node area beam column concrete is communicated with, and this makes the performance that rigidly connects of node be guaranteed, and stressing conditions and ordinary reinforced concrete structure are similar, and power transmission is clear and definite;

2. this node job practices is similar to ordinary reinforced concrete structure, except that the welding of steel pipe spreading, does not have the welding step of other steel work to carry out at the scene, and the welding job amount is little, and construction is convenient;

3. the steel pipe of serialization can disposable lifting multilayer, and the centering of the steel pipe up and down problem when having avoided dividing the construction of floor steel pipe realizes accurately location;

4. node can be connected with the building roof beam of any direction, the flexible arrangement of building roof beam, and construction function request is content with very little;

5. node has saved steel connecting elementss such as reinforcing ring, punching bracket, has reduced structural cost, has good economic benefit.

Description of drawings

Fig. 1 (a) is the sectional drawing of node structure when girder system is the quadrature system of steel core concrete column and building roof beam junction;

Fig. 1 (b) is the plan view of node structure when girder system is the quadrature system of steel core concrete column and building roof beam junction;

Fig. 1 (c) is the plan view of node structure when girder system is nonopiate system of steel core concrete column and building roof beam junction;

Fig. 2 is a job practices flow chart of the present utility model.

Among the figure: the vertical muscle 3-ring beam stirrup 4-post connection lengthwise rib 5-post of 1-steel core concrete column 2-ring beam annular connects the vertical muscle 7-building roof beam 8-annular concrete roof beam 9-beam stirrup of stirrup 6-beam

The specific embodiment

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

6. after the steel pipe column concrete setting, the casting beams concrete.

Can implement the utility model preferably with above-mentioned job practices.

Claims

1. the node structure of steel core concrete column and building roof beam junction, comprise steel core concrete column, building roof beam and annular concrete roof beam, it is characterized in that, the steel core concrete column of vertical member and the building roof beam of horizontal member are in the handing-over of node place, and steel pipe is in the perforate of the position of the corresponding building roof beam of node area; Steel pipe in node area is outside equipped with annular concrete roof beam, and the reinforcing bar in the annular concrete roof beam comprises with the vertical muscle of the concentric ring beam of steel core concrete column annular and radially is actiniform ring beam stirrup; Be provided with in the node area steel core concrete column and the steel pipe bar cage concentric, described reinforcing cage comprises that the post connection lengthwise rib of vertical placement and the post of horizontal positioned are connected stirrup; Described steel pipe tapping is provided with gauze wire cloth.