PEC steel plate shear wall structure with discontinuous steel plates

Abstract

The PEC steel plate shear wall structure with the discontinuous steel plates comprises a plurality of steel frameworks arranged at intervals and concrete wrapping the steel frameworks, the steel frameworks are made of section steel with symmetrical section shapes, and the steel frameworks are provided with flanges and webs which are connected in a crossed mode. Flanges on the two sides of webs of the adjacent steel frameworks are fixedly connected through a plurality of stirrups arranged at intervals, the webs of the adjacent steel frameworks are fixedly connected through web steel bars, and longitudinal steel bars are arranged on the two sides of the webs between the adjacent steel frameworks. The steel frameworks are arranged at intervals, a full-length pouring channel is reserved for pouring of concrete, it can be guaranteed that the concrete poured on the upper portion rapidly flows into the space of the lower cavity, the pouring speed is increased, in order to guarantee the integrity between the steel frameworks, the adjacent steel frameworks are connected through the web steel bars, a truss structure is formed, and the bearing capacity is high; the steel framework is formed through one-time pouring without turning over, the steel consumption of the whole steel framework is reduced, the weight is reduced, and the economic performance is superior.

Description

Technical Field

[0001] The utility model relates to the field of assembled steel structure buildings, in particular to a PEC steel plate shear wall structure with discontinuous steel plates. Background Art

[0002] PEC steel plate shear wall is a prefabricated wall with a steel frame inside and concrete poured on both sides to form a steel-concrete structure. PEC steel plate wall can be prefabricated in the factory, which greatly improves the construction progress compared to the traditional steel bar molded cast-in-place concrete wall. PEC steel plate wall in the prior art mostly uses H-shaped steel as the internal steel frame, and concrete is poured on both sides of the H-shaped steel web. Due to the obstruction of the H-shaped steel web, the steel plate wall of this structure needs to be turned over and concrete is poured twice, that is, one side of the web is poured first, and then the other side of the web is poured. Not only is the construction efficiency low, but it also requires multiple lifting during the turning process, which will also cause hidden dangers to the quality of the components.

[0003] The utility model patent with announcement number CN212656421U discloses "a composite shear wall structure of coated steel and concrete". The internal steel skeleton of the shear wall in the patent also uses H-shaped steel, and multiple cavities are formed by connecting multiple H-shaped steels. Tie rods are set between the flanges of the H-shaped steels in each cavity. Circular holes are opened on the web of each H-shaped steel. The circular holes can be used to achieve single-sided pouring and double-sided forming, and the pouring of concrete can be completed in one time without turning over. Although the steel plate wall structure given in the patent has solved the problem of pouring in one time without turning over, the steel plate wall of this structure uses a lot of steel and the wall weight is large. In addition, the concrete poured into the pouring surface flows to the other side of the web only by relying on the circular holes of limited size, which affects the pouring speed and easily causes the poor density of the concrete on the other side of the web. Utility Model Content

[0004] The utility model discloses a PEC steel plate shear wall which uses less steel, has a light wall structure and can be cast in one time, and is specifically implemented by the following technical solutions:

[0005] A PEC steel plate shear wall structure with discontinuous steel plates comprises a plurality of steel frames arranged at intervals and concrete covering the steel frames, wherein the steel frames are steel sections with symmetrical cross-sectional shapes, the steel frames have intersecting flanges and webs, the flanges on both sides of the webs of adjacent steel frames are fixedly connected by a plurality of stirrups arranged at intervals, the webs of adjacent steel frames are fixedly connected by web reinforcement bars, and longitudinal reinforcement bars are arranged on both sides of the webs between adjacent steel frames.

[0006] Furthermore, stirrups on both sides of adjacent steel skeleton webs are symmetrically arranged.

[0007] Furthermore, the web reinforcement includes horizontal web reinforcement and diagonal web reinforcement, and both ends of the horizontal web reinforcement are welded to the webs of adjacent steel frames; a plurality of diagonal web reinforcements are arranged between the webs of adjacent steel frames, and both ends of the diagonal web reinforcements are welded to the webs of adjacent steel frames.

[0008] Furthermore, diagonal web ribs are provided on both sides of the steel frame web, and multiple diagonal web ribs are arranged at intervals on the same side of adjacent steel frame webs, and the diagonal web ribs on both sides of adjacent steel frame webs form a cross in the orthographic projection.

[0009] Furthermore, the inclined directions of the multiple web oblique reinforcements located on the same side of the webs of adjacent steel frames are not completely consistent, and the web horizontal reinforcements are arranged at the intersection of the web oblique reinforcements with different inclined directions on the same side of the webs of adjacent steel frames.

[0010] Furthermore, horizontal web ribs are provided on both sides of the steel skeleton web, the horizontal web ribs at the same height between adjacent steel skeleton webs are arranged on the same side of the web, and the horizontal web ribs at adjacent heights above and below are respectively located on both sides of the web.

[0011] Furthermore, steel formwork partitions are respectively provided at two opposite ends of each PEC steel plate shear wall, and the steel formwork partitions are respectively fixedly connected to the flange and the web of the steel frame, and reinforcement holes are provided on the steel formwork partitions, and longitudinal reinforcements pass through the reinforcement holes.

[0012] Furthermore, the steel frames at both ends of the PEC steel plate shear wall are T-shaped steel frames, the two T-shaped steel frames are arranged to face each other, and the steel frame between the two T-shaped steel frames is a cross-shaped steel frame.

[0013] The PEC steel plate shear wall designed by the utility model has internal steel frames arranged at intervals, leaving a long pouring channel for pouring concrete, which can ensure that the concrete poured in the upper part flows quickly to the lower cavity space; in order to ensure the integrity between the steel frames, the utility model connects the adjacent steel frames through web steel bars to form a truss structure, and on the premise of not hindering the flow of concrete poured in one time, the bearing capacity of the PEC steel plate shear wall is improved, and the purpose of one-time casting and forming without turning over is achieved. Compared with the solutions of the prior art, the overall steel consumption of the steel frame is greatly reduced, and the overall weight of the PEC steel plate shear wall is also reduced, and the economic performance is obviously more advantageous. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the elevation structure of the PEC steel plate shear wall in the embodiment;

[0015] Figure 2 for Figure 1 Middle AA section view;

[0016] Figure 3 for Figure 1 Middle BB section view;

[0017] Figure 4 for Figure 1 Middle CC section view;

[0018] Figure 5 for Figure 1 Middle DD section view;

[0019] Figure 6 It is a three-dimensional diagram of the internal structure of the PEC steel plate shear wall in the embodiment.

[0020] Description of Figure Numbers:

[0021] 1. T-shaped steel frame; 2. Cross-shaped steel frame; 3. Longitudinal reinforcement; 4. Web oblique reinforcement; 5. Web horizontal reinforcement; 6. Stirrups; 7. Concrete; 8. Steel formwork partition. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] This embodiment discloses a PEC steel plate shear wall structure with discontinuous steel plates, and its structure is as follows Figures 1 to 6 As shown, it is mainly composed of an internal steel frame and concrete 7 covering the steel frame. For the wall or column covered with this steel-concrete structure, the internal steel frame is first connected and assembled, and then concrete is poured on both sides of the steel frame. In order to achieve the purpose of pouring and forming on one side at a time without turning over, the steel frame in this embodiment is arranged in a plurality of intervals. The steel frame used usually has a symmetrical cross-section, and the steel frame has intersecting flanges and webs. The cross-section and size of the steel frame can be designed according to needs. In this embodiment, the skeleton inside the PEC steel plate shear wall is composed of a T-shaped steel frame 1 located at both ends and a plurality of cross-shaped steel frames 2 between the T-shaped steel frames 1 at both ends, wherein the directions of the T-shaped steel frames 1 at both ends need to be set facing each other. The interval arrangement of the steel frames can form a long pouring channel, which can ensure that the concrete 7 poured from the upper part flows quickly to the lower cavity space, thereby speeding up the pouring speed. In order to connect the steel frames together and improve the bearing strength, horizontal stirrups 6 are arranged at intervals on both sides of the webs of adjacent steel frames. The two ends of the stirrups 6 are welded to the flanges of the adjacent steel frames, and the webs of the adjacent steel frames are fixedly connected by the web diagonal bars 4 and the web horizontal bars 5. Longitudinal steel bars 3 are also arranged on both sides of the webs between each group of adjacent steel frames, and the longitudinal steel bars 3 on the same side are tied and fixed to the stirrups 6 on the same side. Figure 1 The direction shown is for reference. The upper and lower ends of each PEC steel plate shear wall are respectively provided with steel formwork partitions 8 ( Figure 1Only the lower steel formwork partition 8 is shown in the figure. The steel formwork partition 8 is fixedly connected to the flange and web of the steel frame respectively. Through-rib holes are opened on the steel formwork partition 8 corresponding to the longitudinal steel bars 3, so that the longitudinal steel bars 3 pass through the through-rib holes to achieve the vertical penetration of the longitudinal steel bars 3. The longitudinal steel bars 3 are welded and fixed at the through-rib holes. On the one hand, the steel formwork partition 8 can fix the longitudinal steel bars 3, and on the other hand, it can act as a side formwork during concrete pouring to prevent the concrete from flowing out of the cross section. The steel formwork partitions 8 at the upper and lower ends of a single PEC steel plate shear wall can also strengthen the longitudinal connection of the steel plate wall.

[0024] The design of the stirrups 6 and the web reinforcements arranged between the steel skeletons inside the PEC steel plate shear wall mainly considers maximizing the bearing capacity of the entire steel skeleton. In this embodiment, the setting position and the inclination direction of the web diagonal reinforcement 4 are set to better ensure that the center of the entire steel skeleton in the PEC steel plate shear wall is located on the center line of the web of the T-shaped steel skeleton 1. The following will focus on the setting principles of the web diagonal reinforcement 4.

[0025] refer to Figure 6 The internal structure of the PEC steel plate shear wall shown has T-shaped steel frames 1 at both ends, three cross-shaped steel frames 2 in the middle, and a certain distance between adjacent steel frames. In each steel frame, the steel plate in the thickness direction is the flange, and the steel plate perpendicular to the flange is the web. Between two adjacent steel frames, a plurality of stirrups 6 are longitudinally spaced on each side of the web, and the stirrups 6 between each group of steel frames at the same height of the steel plate shear wall are located on the same straight line, and the stirrups on both sides of the web are symmetrically arranged with the center line of the web as the axis. A plurality of web diagonal bars 4 are longitudinally spaced between each group of adjacent steel frames, and the web diagonal bars 4 need to be arranged on both sides of the steel frame web, and the web diagonal bars 4 on both sides of the web form a cross in the orthographic projection. Figure 6 In the figure, the web oblique reinforcement 4 shown by the red center line is set on the front side of the steel frame web, and the web oblique reinforcement 4 shown by the green center line is set on the back side of the steel frame web. It can be seen that the web oblique reinforcement 4 on both sides of the web is exactly cross-crossed. This structural design allows the entire center of the component to remain on the center line of the web of the T-shaped steel frame 1, and it is also more convenient for the effective welding of the web oblique reinforcement 4 and the web. There is space for passing through the intersection of the web oblique reinforcement 4, avoiding splitting on the same side.

[0026] As mentioned above, the web diagonal bars 4 on the same side of the steel frame web and the web diagonal bars 4 between the groups of steel frames at the same height of the steel plate shear wall have the same inclination direction, while the web diagonal bars 4 at different heights between adjacent steel frames have different inclination directions. Figure 6As shown, from top to bottom, the inclined directions of the web diagonal bars 4 in the first to third rows are consistent, the inclined directions of the web diagonal bars 4 in the fourth row are different, the inclined directions of the web diagonal bars 4 in the fifth row are consistent with those in the third row, and the inclined directions of the web diagonal bars 4 in the sixth row are consistent with those in the fourth row. It can be seen that the inclined directions of the web diagonal bars 4 at the connection of the steel plate shear wall to the floor slab, and the inclined directions of the web diagonal bars 4 in the upper and lower rows of the floor slab are consistent, while the inclined directions of the web diagonal bars 4 at other heights are changed alternately.

[0027] Regarding the setting of the web horizontal reinforcement 5, Figure 6 As shown, at the intersection of the upper and lower rows of web oblique reinforcements 4 on the same side of the web where the inclination directions are different, web horizontal reinforcements 5 are provided. Figure 6 The middle blue shows the location of the web horizontal ribs 5. The web horizontal ribs 5 set at different heights are not set only on the same side of the steel frame web. The web horizontal ribs 5 at the same height are all set on the same side of the steel frame web, while the two rows of web horizontal ribs 5 at adjacent heights are set on both sides of the steel frame web (i.e. Figure 6 In the figure, the horizontal web ribs 5 shown in blue in the first row and the horizontal web ribs 5 shown in blue in the third row are both arranged on the front side, while the horizontal web ribs 5 shown in blue in the second row are arranged on the back side). This arrangement is also to better ensure the consistency of the center lines of the components.

[0028] The utility model forms the skeleton inside the steel plate shear wall through the organic combination of steel and steel bars, which not only uses less steel and has a light structure, but also uses the gap between the steel sections in the cross section of the component to cast concrete in the front and back positions, realizing one-side casting and double-sided forming. The skeleton casting channel formed by the utility model is unobstructed and has a large space area. Through effective vibration, the concrete casting can be completed faster, and the formed concrete layer is also denser.

[0029] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PEC steel plate shear wall structure with discontinuous steel plates, characterized in that: It includes a plurality of steel frames arranged at intervals and concrete covering the steel frames. The steel frames are made of steel sections with symmetrical cross-sectional shapes. The steel frames have intersecting flanges and webs. The flanges on both sides of the webs of adjacent steel frames are fixedly connected by a plurality of stirrups arranged at intervals. The webs of adjacent steel frames are fixedly connected by web reinforcements. Longitudinal reinforcements are arranged on both sides of the webs between adjacent steel frames.

2. The PEC steel plate shear wall structure with discontinuous steel plates according to claim 1, characterized in that: The stirrups on both sides of the adjacent steel frame webs are arranged symmetrically.

3. The PEC steel plate shear wall structure with discontinuous steel plates according to claim 1, characterized in that: The web reinforcement includes horizontal web reinforcement and diagonal web reinforcement, the two ends of the horizontal web reinforcement are welded to the webs of adjacent steel frames; a plurality of diagonal web reinforcements are arranged between the webs of adjacent steel frames, the two ends of the diagonal web reinforcements are welded to the webs of adjacent steel frames.

4. The PEC steel plate shear wall structure with discontinuous steel plates according to claim 3 is characterized in that: Both sides of the steel frame web are provided with web oblique ribs, a plurality of web oblique ribs on the same side of adjacent steel frame webs are arranged at intervals, and the web oblique ribs on both sides of adjacent steel frame webs form a cross in the orthographic projection.

5. The PEC steel plate shear wall structure with discontinuous steel plates according to claim 4 is characterized in that: The inclination directions of multiple web oblique reinforcements located on the same side of the webs of adjacent steel frames are not completely consistent, and web horizontal reinforcements are arranged at the intersection of web oblique reinforcements with different inclination directions on the same side of the webs of adjacent steel frames.

6. The PEC steel plate shear wall structure with discontinuous steel plates according to claim 5, characterized in that: Horizontal web ribs are provided on both sides of the steel frame web, the horizontal web ribs at the same height between adjacent steel frame webs are arranged on the same side of the web, and the horizontal web ribs at adjacent heights above and below are respectively located on both sides of the web.

7. The PEC steel plate shear wall structure with discontinuous steel plates according to claim 1, characterized in that: Steel formwork partitions are respectively provided at two opposite ends of each PEC steel plate shear wall. The steel formwork partitions are respectively fixedly connected to the flange and web of the steel frame. Reinforcement holes are provided on the steel formwork partitions, and longitudinal reinforcements pass through the reinforcement holes.

8. The PEC steel plate shear wall structure with discontinuous steel plates according to claim 1, characterized in that: The steel frames at both ends of the PEC steel plate shear wall are T-shaped steel frames, the two T-shaped steel frames are arranged facing each other, and the steel frame between the two T-shaped steel frames is a cross-shaped steel frame.

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