Hybrid coupled wall structure with replaceable energy-consuming steel coupling beams and construction method

Abstract

The invention relates to the field of fabricated buildings, in particular to a hybrid coupled wall structure with a replaceable energy-consuming steel coupling beam and a construction method.The hybrid coupled wall structure comprises at least two PEC shear walls, at least two steel coupled skirt beams and the energy-consuming steel coupling beam, and each PEC shear wall comprises a steel framework, stirrups and concrete; the steel framework comprises a web located in the middle and side columns located at the two ends of the web respectively and connected with the web, stirrups are arranged in grids on the two sides of the side columns and grids on the two sides of the web at intervals in the height direction, the side columns at the mutually-connected ends of the two PEC shear walls are each fixedly provided with a steel coupled skirt beam, and holes are formed in the steel coupled skirt beams; the energy dissipation steel coupling beam comprises two C-shaped steel channels, holes are formed in the two ends of each C-shaped steel channel, the two steel coupled skirt beams are fixedly connected through the two back-to-back C-shaped steel channels through bolts, and the strength of steel adopted by the energy dissipation steel coupling beam is lower than that of steel adopted by the steel framework and the steel coupled skirt beams. According to the invention, post-earthquake structure repair is facilitated.

Description

Technical Field

[0001] The invention relates to the field of prefabricated buildings, and in particular to a hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams and a construction method. Background Art

[0002] Two or more PEC shear walls with relatively small width and thickness are connected by steel connecting beams to form a new type of hybrid PEC connected limb wall. The required components can be processed in the factory and only splicing and installation are required on site. This can effectively reduce the construction period while ensuring the construction quality of the components and has good economic effects.

[0003] In the hybrid coupled wall system, the steel coupling beam has sufficient ductility and plastic deformation capacity, and can provide a fuller hysteresis curve. Under the expected earthquake action, the hybrid coupled wall is in a ductile failure form, which can solve the problem of insufficient ductility of the coupling beam with a small span-to-height ratio. However, due to the uncertainty and complexity of earthquake action, the structure may be subjected to earthquake action greater than the design intensity. When the earthquake action exceeds expectations, the steel coupling beam, as the first line of defense of the hybrid coupled wall structure, is inevitably damaged, and post-earthquake repair is very necessary.

[0004] In the prior art hybrid PEC connected limb wall structure, the side columns of the shear wall and the steel connecting beam are mainly connected by joint post-cast strips, which has the following shortcomings: (1) Poor seismic performance; (2) Difficulty in post-earthquake repair; (3) In actual projects, it is difficult to lay hybrid PEC connected walls at the door and window openings of some buildings. Summary of the invention

[0005] Based on the above-mentioned deficiencies in the prior art, the present invention first discloses a hybrid connected wall structure with replaceable energy-absorbing steel connecting beams, which not only has good seismic performance, but is also very convenient for replacing the energy-absorbing steel connecting beams during post-earthquake repairs, and can also be flexibly arranged according to the actual locations of door and window openings of the building.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams comprises at least two PEC shear walls, at least two steel connected-limb skirt beams and an energy-absorbing steel connecting beam. The PEC shear wall comprises a steel skeleton, stirrups and concrete. The steel skeleton comprises a web located in the middle, side columns located at both ends of the web and connected to the web, stirrups are arranged at intervals along the height direction in the grids on both sides of the side columns and in the grids on both sides of the web. A steel connected-limb skirt beam is respectively fixed on the side columns at the ends of the two PEC shear walls connected to each other, and a hole is opened on the steel connected-limb skirt beam. The energy-absorbing steel connecting beam comprises two C-shaped channel steels, holes are opened at both ends of the C-shaped channel steels, and the two steel connected-limb skirt beams are fixedly connected by bolts through two back-to-back C-shaped channel steels. The strength of the steel used in the energy-absorbing steel connecting beam is lower than the strength of the steel used in the steel skeleton and the steel connected-limb skirt beam.

[0007] Furthermore, the side columns and the steel skirt beams are both made of H-shaped steel.

[0008] Furthermore, the steel frame and the steel connecting skirt beam are made of Q460 steel, and the energy-absorbing steel connecting beam is made of Q235B steel.

[0009] Furthermore, the spacing of the stirrups in the side column grid connected to the steel limb skirt beam is smaller than the spacing of the stirrups in the grid where the steel skeleton web is located and in the side column grid far away from the steel limb skirt beam side.

[0010] Furthermore, the spacing of the stirrups in the side column area connected to the steel skirt beam is 100 mm, and the spacing of the stirrups in the area where the steel skeleton web is located and in the side column area away from the steel skirt beam side is 200 mm.

[0011] Furthermore, in the steel skeleton inside the PEC shear wall, a stiffening plate is welded at a position corresponding to the steel skirt beam in the side column area connected to the steel skirt beam, and the thickness of the stiffening plate is greater than the thickness of the flange plate of the steel skirt beam.

[0012] Furthermore, the two interconnected PEC shear walls are both shear walls of strong axis wall members. The steel connecting skirt beam on the shear wall of the strong axis wall member is welded to the outer flange of the side column. Upper and lower transverse stiffening plates are respectively arranged in the side column area connected to the steel connecting skirt beam, and the two transverse stiffening plates correspond to the upper and lower end surfaces of the steel connecting skirt beam respectively.

[0013] Furthermore, among the two interconnected PEC shear walls, one PEC shear wall is the shear wall of the strong-axis wall member, and the other PEC shear wall is the shear wall of the weak-axis wall member; the steel limb skirt beam on the shear wall of the strong-axis wall member is welded to the outer flange of the side column, and upper and lower transverse stiffening plates are respectively arranged in the side column area connected to the steel limb skirt beam, and the two transverse stiffening plates correspond to the upper and lower end surfaces of the steel limb skirt beam respectively; in the shear wall of the weak-axis wall member, upper and lower transverse stiffening plates and a vertical stiffening plate connecting the two transverse stiffening plates are respectively arranged in the side column area connected to the steel limb skirt beam, the steel limb skirt beam of the shear wall of the weak-axis wall member adopts H-shaped steel, and the steel limb skirt beam is perpendicular to the shear wall of the weak-axis wall member, the upper and lower flanges of the steel limb skirt beam are correspondingly welded to the upper and lower transverse stiffening plates, and the web of the steel limb skirt beam is correspondingly welded to the vertical stiffening plate.

[0014] The present invention also discloses a construction method of a hybrid connected limb wall structure with replaceable energy-absorbing steel connecting beams, wherein two interconnected PEC shear walls in the hybrid connected limb wall structure are both shear walls of strong-axis wall limbs, and the construction method of the hybrid connected limb wall structure comprises the following steps: Step 1: Select Q460 steel and process it into webs and side columns of H-shaped steel structure respectively, and weld and fix the two ends of the web to the flange of a side column respectively to form a steel skeleton; Step 2: Weld a steel skirt beam on the outer flange of one side column of the steel frame. The steel skirt beam is an H-shaped steel structure. The steel skirt beam is made of Q460 steel. Holes are opened on the steel skirt beam. Step 3: Weld two transverse stiffening plates in the side column area connected to the steel skirt beam, and the two transverse stiffening plates correspond to the upper and lower flanges of the steel skirt beam respectively; Step 4: After completing step 3, stirrups are welded at intervals along the height direction in the grids of the side columns on both sides of the steel skeleton and in the grids where the webs are located, and the stirrups in the grids of the side columns connected to the steel skirt beam are denser along the height direction; Step 5: After completing step 4, concrete is poured on both sides of the formed steel skeleton to form a shear wall of the strong axis wall; Step 6: Use Q235B steel to make C-shaped channel steel. Open holes at both ends of the C-shaped channel steel. Make the ends of the steel skirt beams on the shear walls of the two strong-axis wall members face each other. Set two back-to-back C-shaped channel steels between the two steel skirt beams to form an energy-absorbing steel connecting beam. Fix the two ends of the energy-absorbing steel connecting beam to the steel skirt beam on the corresponding side with bolts.

[0015] The present invention also discloses another construction method of a hybrid connected limb wall structure with replaceable energy-absorbing steel connecting beams. In the hybrid connected limb wall structure, two interconnected PEC shear walls, one of which is a shear wall of a strong-axis wall limb, and the other is a shear wall of a weak-axis wall limb. The construction method of the hybrid connected limb wall structure comprises the following steps: Step 1: Select Q460 steel and process it into webs and side columns of H-shaped steel structure respectively, and weld and fix the two ends of the web to the flange of a side column respectively to form a steel skeleton; Step 2: Process the shear walls of the strong axis wall and the weak axis wall respectively. The shear walls of the strong axis wall are constructed according to the following steps: 2.1: A steel skirt beam is welded on the outer flange of one of the side columns in the steel frame. The steel skirt beam is an H-shaped steel structure. The steel skirt beam is made of Q460 steel and has holes in it. 2.2: Weld the upper and lower transverse stiffening plates in the side column area connected to the steel skirt beam, and the two transverse stiffening plates correspond to the upper and lower flanges of the steel skirt beam respectively; 2.3: After completing step 2.2, stirrups are welded at intervals along the height direction in the grids of the side columns on both sides of the steel skeleton and in the grids where the webs are located, and the stirrups in the grids of the side columns connected to the steel skirt beam are increased in the height direction; 2.4: After completing step 2.3, concrete is poured on both sides of the formed steel skeleton to form the shear wall of the strong axis wall; The shear wall of the weak axis wall is constructed according to the following steps: 2.5: In the side column area of ​​the steel frame connected to the steel skirt beam, weld the upper and lower transverse stiffening plates respectively, and weld the vertical stiffening plate between the two transverse stiffening plates; 2.6: After completing step 2.5, stirrups are welded at intervals along the height direction in the grids of the side columns on both sides of the steel skeleton and in the grids where the webs are located, and the stirrups in the grids of the side columns connected to the steel skirt beam are denser along the height direction; 2.7: After completing step 2.6, the steel skirt beam is perpendicular to the side column of the steel frame and welded and fixed, so that the upper and lower flanges of the steel skirt beam are respectively welded to the upper and lower two transverse stiffening plates, and the web of the steel skirt beam is welded to the vertical stiffening plate. The steel skirt beam is an H-shaped steel structure, and the steel skirt beam is made of Q460 steel. Holes are opened on the steel skirt beam; 2.8: After completing step 2.7, concrete is poured on both sides of the formed steel skeleton to form the shear wall of the weak axis wall; Step 3: Use Q235B steel to make C-shaped channel steel. Open holes at both ends of the C-shaped channel steel. Make the shear wall of the strong-axis wall member and the shear wall of the weak-axis wall member perpendicular to each other. Make the ends of the steel skirt beams on the two shear walls face each other. Set two back-to-back C-shaped channel steels between the two steel skirt beams to form an energy-absorbing steel connecting beam. Fix the two ends of the energy-absorbing steel connecting beam to the steel skirt beam on the corresponding side with bolts.

[0016] The present invention uses ordinary steel with low yield strength and good deformation capacity to make energy-absorbing steel connecting beams, and uses high-strength steel for other non-energy-absorbing components (including steel connecting skirt beams and steel frames). Under the action of a large earthquake, the energy-absorbing steel connecting beams completely enter an elastic-plastic state to consume energy, while non-energy-absorbing components can still maintain elasticity or partially develop plasticity. After the earthquake, only the damaged energy-absorbing steel connecting beams need to be replaced to quickly restore the function of the structure, and the effect of energy conservation and emission reduction can also be achieved. In order to facilitate the replacement of energy-absorbing steel connecting beams, the present invention pre-welds steel connecting skirt beams on the side columns of the shear wall, and uses high-strength bolts to connect the energy-absorbing steel connecting beams with the steel connecting skirt beams on the shear walls on both sides. Not only is the force transmission clear, but it is also easy to disassemble and assemble. The relevant components can be prefabricated in the factory, which can reduce the wet operation of on-site construction and increase the speed of construction. The present invention also takes into account the different positions and sizes of door and window openings in different architectural schemes, so as to facilitate adaptation to the layout requirements of door and window openings in different buildings. The present invention provides a hybrid connected wall structure with strong-strong axis connection and a hybrid connected wall structure with strong-weak axis connection, which can adapt to different architectural schemes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an exploded view of the steel skeleton inside the PEC shear wall; Figure 2 Schematic diagram of the PEC shear wall of the strong axis wall after the concrete is removed; Figure 3 Exploded view of a hybrid connected wall to form a strong-strong axis wall connection; Figure 4 The structural diagram of the hybrid joint wall for forming a strong-strong axis wall connection; Figure 5 Internal exploded view after removing concrete to form a hybrid connected wall structure with strong-weak axis wall connection; Figure 6 Assembly drawing after removing concrete to form a hybrid connected pier wall structure with strong-weak axis pier connection; Figure 7 Structural diagram of a hybrid connected wall forming a strong-weak axis wall connection.

[0018] Reference numerals: 1. First side column; 2. Second side column; 3. Web plate; 4. Steel skirt beam; 5. Stirrups; 6. Transverse stiffening plate; 7. Concrete; 8. Energy-absorbing steel connecting beam; 9. Vertical stiffening plate. DETAILED DESCRIPTION

[0019] 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.

[0020] The present embodiment discloses a hybrid connected limb wall structure with replaceable energy-absorbing steel connecting beams. In order to be applicable to different building schemes and to be selected according to the size and position of door and window openings, the present embodiment provides two hybrid connected limb wall structures with different connection structures, one is a hybrid connected limb wall with strong-strong axis connection, and the other is a hybrid connected limb wall with strong-weak axis connection. The two interconnected shear walls of the former have the same structure, both of which are shear walls of strong-axis wall limbs; of the two interconnected shear walls of the latter, one is a shear wall of strong-axis wall limbs, and the other is a shear wall of weak-axis wall limbs. The above two hybrid connected limb wall structures are composed of PEC shear walls, steel connected limb skirt beams 4 and energy-absorbing steel connecting beams 8. In order to more clearly show the similarities and differences between the two hybrid connected limb wall structures, the following first describes the similarities between the two structures, and then introduces the differences respectively.

[0021] Common points: The PEC shear wall described in this embodiment is mainly composed of a steel skeleton, stirrups 5 and concrete 7, wherein Figure 1 As shown, the steel frame is composed of a web 3 and two side columns. The side columns are H-shaped steel structures. In order to distinguish the side columns on both sides of the web 3, the side column on one side is called the first side column 1, and the side column on the other side is called the second side column 2. Figure 2 As shown, the left end of the web 3 is welded to the right flange of the first side column 1, and the right end of the web 3 is welded to the left flange of the second side column 2. When welding, the web 3 and the webs of the side columns on both sides are located on the same plane. The steel limb skirt beam 4 mentioned in this embodiment also adopts an H-shaped steel structure, and a bolt hole is provided on the web of the steel limb skirt beam 4 near the connection end. Figure 3 As shown, the energy-absorbing steel connecting beam 8 mentioned in this embodiment is composed of two back-to-back C-shaped channel steels, and bolt holes are respectively provided at both ends of each C-shaped channel steel for subsequent bolt connection. The steel skeleton (web 3 and side columns) and the steel connecting limb skirt beam 4 in this embodiment are made of high-strength steel, such as Q460 type steel. The energy-absorbing steel connecting beam 8 in this embodiment is made of ordinary steel, such as Q235B type steel, that is, the strength of the energy-absorbing steel connecting beam 8 needs to be lower than the strength of the steel skeleton and the steel connecting limb skirt beam 4. Ordinary steel is mainly composed of iron, carbon, manganese and other elements, among which iron accounts for the main proportion; while high-strength steel is based on ordinary steel and other alloy elements, such as silicon, phosphorus, nickel, etc., are added to improve its mechanical properties and corrosion resistance.

[0022] Embodiment 1: This embodiment shows a hybrid connected limb wall with strong-strong axis connection. The two interconnected PEC shear walls are both PEC shear walls with strong axis limbs. When processing the PEC shear walls with strong axis limbs, Figure 2 As shown, in the formed steel skeleton, the side column on the right is the second side column 2, the side column on the left is the first side column 1, and the steel limb skirt beam 4 is welded to the flange on the outside of the second side column 2. Since the second side column 2 needs to be connected to the steel limb skirt beam 4, it is necessary to weld two upper and lower transverse stiffening plates 6 in the grid on the upper part of the second side column 2 (in the grid on both sides of the web of the second side column 2) to strengthen the node area. The thickness of the transverse stiffening plate 6 is slightly thicker than the flange thickness of the steel limb skirt beam 4. In this embodiment, the thickness of the transverse stiffening plate 6 is tf+2mm, and the spacing between the upper and lower transverse stiffening plates 6 corresponds to the spacing between the upper and lower flanges of the steel limb skirt beam 4.

[0023] In continuation of the above, on both sides of the steel skeleton, in the corresponding grids where the first side column 1, the web 3, and the second side column 2 are located, stirrups 5 (which can also be replaced by flat steel) are arranged at intervals along the height direction. For the stirrups 5 in the grid where the second side column 2 is located, the stirrups 5 are denser in the entire length direction, and the stirrups 5 in the grid where the first side column 1 and the web 3 are located do not need to be denser. For example, the spacing between the stirrups 5 in the grid where the first side column 1 and the web 3 are located is 200mm, and the spacing between the stirrups 5 in the grid where the second side column 2 is located is 100mm. After the steel skeleton, the steel skirt beam 4, the transverse stiffening plate 6, and the stirrups 5 are assembled, concrete 7 is poured on both sides of the steel skeleton to form the following. Figure 3 When the PEC shear walls of two strong axis walls are connected, Figure 4 As shown, the PEC shear walls of the two strong axis wall members are placed side by side, the ends of the two steel limb skirt beams 4 are opposite to each other, an energy-absorbing steel connecting beam 8 is arranged between the two steel limb skirt beams 4, and the two C-shaped channel steels constituting the energy-absorbing steel connecting beam 8 are back-to-back and jointly clamp the webs of the two steel limb skirt beams 4, and the two ends of the C-shaped channel steel are fixedly connected to the steel limb skirt beam 4 with high-strength bolts.

[0024] The construction method of the mixed limb wall structure in Example 1 comprises the following steps: Step 1: Process the web 3 and the side columns of the H-shaped steel structure in the factory, and weld and fix the two ends of the web 3 to the flange of a side column to form a steel frame; Step 2: welding the steel skirt beam 4 to the outer flange of the second side column 2 of the steel frame in the factory; Step 3: In the factory, two transverse stiffening plates 6 are respectively welded in the area of ​​the second side column 2 corresponding to the upper and lower flanges of the steel skirt beam 4; Step 4: After completing step 3, stirrups 5 are welded at intervals along the height direction in the cells where the first side column 1, the web 3, and the second side column 2 are located, wherein the stirrups 5 in the cell of the second side column 2 are denser along the height direction; Step 5: After completing step 4, the entire wall member is laid flat on the ground to cast concrete 7. During the casting, the web plate can be cast on both sides without opening holes, or the web plate can be cast on one side with holes. After curing, the shear wall of the strong axis wall member can be formed; Step 6: Transport the formed shear wall of the strong axis wall and the C-shaped channel steel to the construction site, so that the ends of the steel connecting skirt beams 4 on the shear walls of the two interconnected strong axis wall members are opposite to each other, and two back-to-back C-shaped channel steels are arranged between the two steel connecting skirt beams 4, and the two ends of the C-shaped channel steel are fixedly connected to the steel connecting skirt beams 4 on the corresponding side with high-strength bolts.

[0025] Embodiment 2: This embodiment shows a hybrid connected limb wall with strong-weak axis connection, that is, the PEC shear wall of the strong-axis wall limb is interconnected with the PEC shear wall of the weak-axis wall limb. The structure and construction process of the PEC shear wall of the strong-axis wall limb in this embodiment are the same as those described in Embodiment 1, and this embodiment will not repeat them. Only the differences between the PEC shear wall of the weak-axis wall limb and the PEC shear wall of the strong-axis wall limb are emphasized. For matters not specifically pointed out, reference can be made to the PEC shear wall of the strong-axis wall limb given above.

[0026] PEC shear wall with weak axis wall, such as Figures 5 to 7 As shown in the shear wall on the right side, when the steel limb skirt beam 4 is connected, it is vertically connected to the second side column 2 of the steel frame (the present invention positions the side column connected to the steel limb skirt beam 4 as the second side column 2). In view of the I-shaped cross section of the steel limb skirt beam 4, in addition to setting two upper and lower transverse stiffening plates 6 in the grid of the second side column 2, a vertical stiffening plate 9 is also required to be set between the two transverse stiffening plates 6. When the steel limb skirt beam 4 is connected to the second side column 2, the upper and lower flanges of the steel limb skirt beam 4 are respectively welded to the upper and lower transverse stiffening plates 6, and the web of the steel limb skirt beam 4 is respectively welded to the vertical stiffening plate 9. Regarding the setting of the stirrups 5 and the pouring of the concrete 7 in this embodiment, refer to the contents given in Example 1 for setting. When the PEC shear wall of the strong-axis wall member is connected with the PEC shear wall of the weak-axis wall member, the steel connecting skirt beam 4 on the PEC shear wall of the strong-axis wall member and the steel connecting skirt beam 4 on the PEC shear wall of the weak-axis wall member are arranged to face each other, and then two back-to-back C-shaped channel steels are fixedly connected to the steel connecting skirt beam 4 through high-strength bolts.

[0027] The construction method of the hybrid connected limb wall structure in Example 2 is mostly the same as that in Example 1. The same parts are briefly described below, and the differences are emphasized. The entire construction method of Example 2 includes the following steps: Step 1: Forming the steel skeleton; Step 2: Process the shear walls of the strong axis wall and the shear walls of the weak axis wall respectively; Wherein, when the shear wall of the strong axis wall is processed in the manner of Example 1 and the shear wall of the weak axis wall is processed, after the steel skeleton is completed, the following steps are performed; 1): In the area of ​​the second side column 2, two transverse stiffening plates 6 are welded respectively corresponding to the upper and lower flange positions of the steel limb skirt beam 4, and a vertical stiffening plate 9 is welded between the two transverse stiffening plates 6 corresponding to the web position of the steel limb skirt beam 4; 2): After completing the welding of the above-mentioned stiffening plates, complete the welding of stirrups 5 in the corresponding area of ​​the steel skeleton; 3): After completing the welding of the stirrups 5, vertically weld the steel skirt beam 4 to the second side column 2, so that the upper and lower flanges of the steel skirt beam 4 are respectively welded to the upper and lower two transverse stiffening plates 6, and the web of the steel skirt beam 4 is welded to the vertical stiffening plate 9; 4): After completing step 3), pouring of concrete 7 is carried out.

[0028] Step 3: Set the shear wall of the strong axis wall member and the shear wall of the weak axis wall member perpendicular to each other, so that the ends of the steel skirt beams 4 on the two shear walls are opposite to each other, and use two back-to-back C-shaped channel steels to fix and connect the steel skirt beams 4 on the corresponding side through high-strength bolts.

[0029] Although 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 hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams, characterized in that: It comprises at least two PEC shear walls, at least two steel-connected skirt beams and an energy-absorbing steel connecting beam. The PEC shear wall comprises a steel frame, stirrups and concrete. The steel frame comprises a web located in the middle, side columns located at both ends of the web and connected to the web, stirrups are arranged at intervals along the height direction in the grids on both sides of the side columns and in the grids on both sides of the web. A steel-connected skirt beam is fixed on each of the side columns at the ends of the two PEC shear walls connected to each other, and a hole is opened on the steel-connected skirt beam; the energy-absorbing steel connecting beam comprises two C-shaped channel steels, holes are opened at both ends of the C-shaped channel steels, and the two steel-connected skirt beams are fixedly connected by bolts through two back-to-back C-shaped channel steels. The strength of the steel used in the energy-absorbing steel connecting beam is lower than the strength of the steel used in the steel frame and the steel-connected skirt beam.

2. The hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams according to claim 1 is characterized in that: The side columns and the steel skirt beams are both made of H-shaped steel.

3. The hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams according to claim 1 is characterized in that: The steel frame and the steel connecting skirt beam are made of Q460 steel, and the energy-absorbing steel connecting beam is made of Q235B steel.

4. The hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams according to claim 1 is characterized in that: The spacing of the stirrups in the side column area connected to the steel skirt beam is smaller than the spacing of the stirrups in the area where the steel skeleton web is located and in the side column area away from the steel skirt beam side.

5. The hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams according to claim 4 is characterized in that: The spacing of the stirrups in the side column area connected to the steel skirt beam is 100 mm, and the spacing of the stirrups in the area where the steel skeleton web is located and in the side column area away from the steel skirt beam is 200 mm.

6. The hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams according to claim 1 is characterized in that: In the steel frame inside the PEC shear wall, a stiffening plate is welded at a position corresponding to the steel skirt beam in the side column area connected to the steel skirt beam, and the thickness of the stiffening plate is greater than the thickness of the flange plate of the steel skirt beam.

7. The hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams according to claim 6 is characterized in that: The two interconnected PEC shear walls are both shear walls of strong axis wall members. The steel connecting skirt beam on the shear wall of the strong axis wall member is welded to the outer flange of the side column. The upper and lower transverse stiffening plates are respectively arranged in the side column area connected to the steel connecting skirt beam. The two transverse stiffening plates correspond to the upper and lower end surfaces of the steel connecting skirt beam respectively.

8. The hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams according to claim 6 is characterized in that: Among the two interconnected PEC shear walls, one PEC shear wall is the shear wall of the strong-axis wall member, and the other PEC shear wall is the shear wall of the weak-axis wall member; the steel limb skirt beam on the shear wall of the strong-axis wall member is welded to the outer flange of the side column, and upper and lower transverse stiffening plates are respectively arranged in the side column area connected to the steel limb skirt beam, and the two transverse stiffening plates correspond to the upper and lower end surfaces of the steel limb skirt beam respectively; in the shear wall of the weak-axis wall member, upper and lower transverse stiffening plates and a vertical stiffening plate connecting the two transverse stiffening plates are respectively arranged in the side column area connected to the steel limb skirt beam, the steel limb skirt beam of the shear wall of the weak-axis wall member adopts H-shaped steel, and the steel limb skirt beam is perpendicular to the shear wall of the weak-axis wall member, the upper and lower flanges of the steel limb skirt beam are correspondingly welded to the upper and lower transverse stiffening plates, and the web of the steel limb skirt beam is correspondingly welded to the vertical stiffening plate.

9. A construction method for a hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams as claimed in any one of claims 1 to 7, characterized in that: The two interconnected PEC shear walls in the hybrid coupled wall structure are both shear walls of strong axis wall limbs. The construction method of the hybrid coupled wall structure comprises the following steps: Step 1: Select Q460 steel and process it into webs and side columns of H-shaped steel structure respectively, and weld and fix the two ends of the web to the flange of a side column respectively to form a steel skeleton; Step 2: Weld a steel skirt beam on the outer flange of one side column of the steel frame. The steel skirt beam is an H-shaped steel structure. The steel skirt beam is made of Q460 steel. Holes are opened on the steel skirt beam. Step 3: Weld two transverse stiffening plates in the side column area connected to the steel skirt beam, and the two transverse stiffening plates correspond to the upper and lower flanges of the steel skirt beam respectively; Step 4: After completing step 3, stirrups are welded at intervals along the height direction in the grids of the side columns on both sides of the steel skeleton and in the grids where the webs are located, and the stirrups in the grids of the side columns connected to the steel skirt beam are denser along the height direction; Step 5: After completing step 4, concrete is poured on both sides of the formed steel skeleton to form a shear wall of the strong axis wall; Step 6: Use Q235B steel to make C-shaped channel steel. Open holes at both ends of the C-shaped channel steel. Make the ends of the steel skirt beams on the shear walls of the two strong-axis wall members face each other. Set two back-to-back C-shaped channel steels between the two steel skirt beams to form an energy-absorbing steel connecting beam. Fix the two ends of the energy-absorbing steel connecting beam to the steel skirt beam on the corresponding side with bolts.

10. A construction method for a hybrid connected-limb wall structure with replaceable energy-absorbing steel connecting beams according to any one of claims 1 to 6 or 8, characterized in that: In the two interconnected PEC shear walls in the hybrid coupled wall structure, one PEC shear wall is a shear wall of a strong-axis wall limb, and the other PEC shear wall is a shear wall of a weak-axis wall limb. The construction method of the hybrid coupled wall structure comprises the following steps: Step 1: Select Q460 steel and process it into webs and side columns of H-shaped steel structure respectively, and weld and fix the two ends of the web to the flange of a side column respectively to form a steel skeleton; Step 2: Process the shear walls of the strong axis wall and the weak axis wall respectively. The shear walls of the strong axis wall are constructed according to the following steps: 2.1: A steel skirt beam is welded on the outer flange of one of the side columns in the steel frame. The steel skirt beam is an H-shaped steel structure. The steel skirt beam is made of Q460 steel and has holes in it. 2.2: Weld the upper and lower transverse stiffening plates in the side column area connected to the steel skirt beam, and the two transverse stiffening plates correspond to the upper and lower flanges of the steel skirt beam respectively; 2.3: After completing step 2.2, stirrups are welded at intervals along the height direction in the grids of the side columns on both sides of the steel skeleton and in the grids where the webs are located, and the stirrups in the grids of the side columns connected to the steel skirt beam are increased in the height direction; 2.4: After completing step 2.3, concrete is poured on both sides of the formed steel skeleton to form the shear wall of the strong axis wall; The shear wall of the weak axis wall is constructed according to the following steps: 2.5: In the side column area of ​​the steel frame connected to the steel skirt beam, the upper and lower transverse stiffening plates are welded respectively, and the vertical stiffening plate is welded between the two transverse stiffening plates; 2.6: After completing step 2.5, stirrups are welded at intervals along the height direction in the grids of the side columns on both sides of the steel skeleton and in the grids where the webs are located, and the stirrups in the grids of the side columns connected to the steel skirt beam are denser along the height direction; 2.7: After completing step 2.6, the steel skirt beam is perpendicular to the side column of the steel frame and welded and fixed, so that the upper and lower flanges of the steel skirt beam are respectively welded to the upper and lower two transverse stiffening plates, and the web of the steel skirt beam is welded to the vertical stiffening plate. The steel skirt beam is an H-shaped steel structure, and the steel skirt beam is made of Q460 steel. Holes are opened on the steel skirt beam; 2.8: After completing step 2.7, concrete is poured on both sides of the formed steel skeleton to form the shear wall of the weak axis wall; Step 3: Use Q235B steel to make C-shaped channel steel. Open holes at both ends of the C-shaped channel steel. Make the shear wall of the strong-axis wall member and the shear wall of the weak-axis wall member perpendicular to each other. Make the ends of the steel skirt beams on the two shear walls face each other. Set two back-to-back C-shaped channel steels between the two steel skirt beams to form an energy-absorbing steel connecting beam. Fix the two ends of the energy-absorbing steel connecting beam to the steel skirt beam on the corresponding side with bolts.

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