CN109868918B

CN109868918B - Connection structure of L-shaped superimposed shear wall edge member

Info

Publication number: CN109868918B
Application number: CN201910142125.0A
Authority: CN
Inventors: 谷倩; 赵端锋; 黄蓉华; 邓庆; 柯杨
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2019-02-26
Filing date: 2019-02-26
Publication date: 2021-04-16
Anticipated expiration: 2039-02-26
Also published as: CN109868918A

Abstract

The invention relates to a connection structure of edge members of an L-shaped superimposed shear wall, comprising superimposed flange wall panels, superimposed webs and post-casting areas of L-shaped corner edge members. The horizontal reinforcement in the superimposed layer of the inner and outer leaves in the web extends to a certain length in the post-casting area of the edge member, and then bends and turns to extend to the cavity layer of the superimposed wall panel to form a semi-open annular horizontal reinforcement. The horizontal stirrups in the post-casting area of the edge member are placed on the semi-open annular horizontal steel bars and bound to form a plurality of closed hoops. Concrete is poured in the cavity layer and in the post-cast area of the edge member to anchor the semi-open annular horizontal reinforcement. In the present invention, by inserting vertical force-bearing steel bars into the closed hoop, the reliable connection between the laminated flange wall panel, the laminated web and the post-casting area of the L-shaped corner edge member is realized, and the L-shaped corner edge member is improved. Coordinated deformation ability of post-cast area and superimposed wall panels on both sides.

Description

Connection structure of L-shaped superimposed shear wall edge member

Technical Field

The invention relates to the technical field of buildings, in particular to a connecting structure of an L-shaped superimposed shear wall edge member.

Background

The L-shaped superposed shear wall with the edge components is applied to the assembled high-rise building structure more frequently, and particularly, when the L-shaped superposed shear wall is used as a corner wall around a building, the L-shaped superposed shear wall is stressed most under the action of earthquake load, wind load and the like and is a part with serious damage.

The full cast-in-place of the L-shaped superimposed shear wall edge member is a main edge member type at present, and whether a connection structure between post-cast concrete and the linear superimposed shear wall in two directions is safe and reliable in the edge member of the type is a key for ensuring the integral stress of the L-shaped superimposed shear wall edge member. At present, the traditional connecting structure method mainly has two forms, namely a steel bar lap joint connecting structure and a superposed shear wall horizontal steel bar outward straightening anchor connecting structure are additionally arranged on a cavity layer of a superposed shear wall, and the two connecting structures respectively have certain defects, such as reduction of effective area of a section at a splicing seam, formation of a weak layer, insufficient utilization of horizontal steel bars in an edge component and a prefabricated superposed layer, inconvenience in transportation and assembly due to overlong exposed horizontal steel bars of a straight anchor, and the like; meanwhile, U-shaped horizontal lapping steel bars in the lapping connection structure mode are arranged in the cavity layer, so that the torsional deformation of the edge member of the L-shaped superposed shear wall cannot be effectively resisted, and the lapping performance under the twisting action is not clear.

Disclosure of Invention

In order to solve the problems, the connection structure of the L-shaped overlapped shear wall edge member is reasonable in stress and reliable in connection.

The specific technical scheme is as follows:

the utility model provides a connection structure of L shape coincide shear wall edge member, such characteristic has, including coincide edge of a wing wallboard, coincide web and L shape edge member post-cast area, coincide edge of a wing wallboard, coincide web is located the one end in edge member post-cast area respectively, the horizontal reinforcing bar in coincide edge of a wing wallboard and the coincide web middle and outer leaf superimposed layer extends to certain length in the edge member post-cast area again after buckling and gyration and extend to and form semi-open annular horizontal reinforcing bar in the coincide wallboard cavity layer, horizontal stirrup in the edge member post-cast area is put on semi-open annular horizontal reinforcing bar and ligature forms a plurality of closed form cuffs, vertical atress reinforcing bar has been inserted in the closed form cuff, pour concrete and with horizontal stirrup, semi-open annular horizontal reinforcing bar and vertical atress reinforcing bar anchor in the coincide wallboard cavity layer and the edge member post-cast area.

The connecting structure of the L-shaped superimposed shear wall edge member also has the characteristic that horizontal steel bars in the superimposed flange wall plate and the superimposed web plate inner and outer leaf superimposed layers extend to a certain length in the edge member post-pouring area, then are bent by 90 degrees, extend to a distance of 15-25 mm from a central axis, then are rotated by 90 degrees and extend to the superimposed wall plate cavity layer in parallel to form semi-open annular horizontal steel bars.

The connecting structure of the edge members of the L-shaped superposed shear wall is also characterized in that the anchoring length of the horizontal steel bars in the superposed flange wall boards and the superposed web plates, which are rotatablely extended into the cavity layers of the superposed wall boards, is not less than 1.2L_aE。

The connecting structure of the L-shaped superimposed shear wall edge member also has the characteristic that semi-open annular horizontal steel bars in the edge member post-pouring area are not intersected with each other and are not contacted with each other.

The beneficial effect of above-mentioned scheme is:

1) the horizontal stirrups in the edge member post-pouring area are placed on the semi-open annular horizontal steel bars to form closed hoops, and vertical stress steel bars are inserted into the closed hoops, so that corner walls obtained by pouring concrete in the edge member post-pouring area are reliably connected with the two side superposed wall boards, the coordinated deformation capacity of the corner walls and the two side superposed wall boards is improved, and the integral stress performance of the corner walls and the two side superposed wall boards is ensured;

2) the horizontal steel bars rotate and are anchored in the cavity layer of the laminated wallboard, so that the horizontal steel bars transfer force reasonably, the shear-resistant bearing capacity of the corner wall can be effectively improved, and local shear damage is prevented;

3) the overlapping wallboard component with the semi-open type annular horizontal reinforcing steel bars can be pre-produced, the production and the manufacture are convenient, and the transportation and the stacking of the wallboard component are not influenced by the semi-open type annular horizontal reinforcing steel bars.

Drawings

FIG. 1 is a cross-sectional schematic view of a connection configuration for edge members of an L-shaped stacked shear wall provided in an embodiment of the present invention;

fig. 2 is a schematic reinforcing bar arrangement diagram of a connection configuration of edge members of an L-shaped stacked shear wall provided in an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

As shown in fig. 1 and 2, the connection structure of the edge member of the L-shaped superimposed shear wall provided in the embodiment of the present invention includes a flange wall panel 1, a web panel 2 and an L-shaped edge member post-pouring region 3, where the flange wall panel 1 and the web panel 2 are superimposed wall panels, in the present invention, horizontal steel bars 4 in the inner and outer leaf superimposed layers of the flange wall panel 1 and the web panel 2 are extended to the edge member post-pouring region 3 for a certain length, then bent 90 degrees to a distance of 15mm-25mm from the central axis of the superimposed wall panel, then turned 90 degrees and extended in parallel to the cavity layer 5 of the corresponding superimposed wall panel to form semi-open annular horizontal steel bars, horizontal stirrups 6 in the edge member post-pouring region 3 are placed on the semi-open annular horizontal steel bars and bound to form 4 closed hoops 7, vertical stressed steel bars 8 are inserted into the closed hoops 7, concrete is poured into the cavity layer of the superimposed wall panel and the edge member post-pouring region 3, and the horizontal stirrups, The semi-open type annular horizontal reinforcing steel bars and the vertical stressed reinforcing steel bars are anchored, concrete is poured into the edge member post-pouring area 3 to form an L-shaped corner post-pouring area, and the L-shaped corner post-pouring area is reliably connected with the flange wall plate 1 and the web plate 2 to form a connecting structure of the edge members of the corner L-shaped superposed shear wall.

According to the invention, the horizontal steel bars 4 in the laminated wallboard can be pre-bent to obtain the wallboard with the semi-open type annular horizontal steel bars, the transportation and stacking of the wallboard are not influenced by the semi-open type annular horizontal steel bars, and the pre-bending production mode enables the assembly construction to be convenient and rapid.

According to the invention, the vertical stressed steel bars 8 are inserted into the closed hoop 7, so that the post-cast concrete in the edge member post-cast zone 3 is reliably connected with the wall boards on two sides; the semi-open type annular horizontal steel bars are rotationally anchored in the cavity layer of the laminated wallboard, so that the connection is enhanced, the coordinated deformation capacity of the laminated wallboard and the post-cast concrete in the edge member post-cast area 3 is improved, and the integral stress performance of the laminated wallboard and the post-cast concrete is ensured; meanwhile, the horizontal steel bars 4 are reasonable in force transmission, the shear-resistant bearing capacity of the edge component post-pouring area 3 can be effectively improved, and local shear damage is prevented.

The anchoring length of the horizontal steel bar which is rotationally extended into the cavity layer 5 of the laminated wallboard is not less than 1.2l_aETo ensure the strength of the semi-open type annular horizontal reinforcing steel barAnd rigidity, and simultaneously, the semi-open type annular horizontal steel bars are ensured to effectively participate in the anti-shearing action at the post-pouring area 3 of the edge member, and the requirement of anti-seismic performance is met.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims

1. the connection structure of an L-shaped superimposed shear wall edge member, is characterized in that, comprises the post-casting area of the superimposed flange wall panel, superimposed web and L-shaped edge member, the superimposed flange wall The plate and the superimposed web are respectively located at one end of the post-pouring area of the edge member, and the horizontal reinforcement in the superimposed layers of the inner and outer leaves in the superimposed flange wall panel and the superimposed web extends to the After a certain length in the post-casting area of the edge member, it is then bent and rotated to extend into the cavity layer of the laminated wall panel to form a semi-open annular horizontal steel bar, and the horizontal stirrup in the post-casting area of the edge member is placed on the half. A plurality of closed ferrules are formed on the open annular horizontal steel bars and bound to form a plurality of closed ferrules. Vertical stress steel bars are inserted into the closed ferrules, and the vertical stress steel bars are inserted into the cavity layer of the superimposed wallboard and the post-pouring area of the edge member. Concrete is poured and the horizontal stirrups, the semi-open annular horizontal reinforcing bars and the vertically stressed reinforcing bars are anchored.

2 . The connection structure of the edge member of the L-shaped superimposed shear wall according to claim 1 , wherein, in the superimposed flange wall panel and the superimposed web, the inner and outer leaf superimposed layers are 2. 3 . The horizontal steel bar extends to a certain length in the post-casting area of the edge member, then bends 90 degrees and extends to a distance of 15mm-25mm from the central axis, then turns 90 degrees and extends parallel to the cavity layer of the laminated wallboard to form a semi-open Ring-shaped horizontal reinforcement.

3 . The connection structure of the edge member of the L-shaped superimposed shear wall according to claim 2 , wherein the superimposed flange wall panel and the superimposed web plate are swivel and extend to the space of the superimposed wall panel. 4 . The anchoring length of the horizontal reinforcement in the cavity layer is not less than 1.2l _aE .

4. The connection structure of edge members of an L-shaped superimposed shear wall according to any one of claims 1-3, wherein the semi-open annular horizontal reinforcement bars in the post-casting area of the edge members do not intersect with each other and not in contact with each other.