A vertical laminated beam for a modular laminated shear wall and a construction method thereof

Abstract

The application discloses a vertical laminated beam for a modular laminated shear wall and a construction method thereof, comprising two parallel arranged laminated beam prefabricated parts of adjacent module units, a cavity is formed between the two laminated beam prefabricated parts, stirrups and longitudinal reinforcement are embedded in each laminated beam prefabricated part, the stirrups extend to the cavity and a beam plate joint area, longitudinal bottom reinforcement and longitudinal surface reinforcement are arranged at the bottom of the cavity and the beam plate joint area respectively, the extending part of the stirrups is sleeved on the longitudinal surface reinforcement and the longitudinal bottom reinforcement, and once cast-in-situ concrete in the cavity and the beam plate joint area forms the vertical laminated beam, the end of the vertical laminated beam is connected with a laminated shear wall edge component, that is, the longitudinal bottom reinforcement and the longitudinal surface reinforcement of the vertical laminated beam are anchored into the cast-in-situ part of the laminated shear wall edge component and are connected with the reinforcement cage in the laminated shear wall edge component, and the longitudinal reinforcement of the laminated beam prefabricated part is anchored into the prefabricated part of the laminated shear wall edge component. The application has the advantages of simple and reasonable structure, good stress performance, convenient on-site assembly, high construction efficiency and reliable quality.

Description

Technical Field

[0001] This invention belongs to the field of building industrialization and prefabricated concrete structure technology, and particularly relates to a vertical composite beam for modular composite shear walls and its construction method. Background Technology

[0002] Modular construction is an important development direction of prefabricated construction. Concrete modular construction is formed by assembling and connecting prefabricated modular units in a factory on site. The horizontal connection between adjacent modular units, especially the connection between composite beams and composite shear walls, is the key to ensuring the integrity of the structure.

[0003] Currently, there are several modular composite beam solutions for horizontal connection of modular units, typically using precast beam shells and subsequent cast-in-place concrete to form the composite beam. However, these solutions have the following shortcomings:

[0004] (1) After construction, precast beam shells are mostly used as templates and do not participate in structural stress or only partially participate in structural stress. The material utilization rate is low and the structural redundancy is insufficient.

[0005] (2) A large number of stirrups and longitudinal steel bars for tying beams are still required on site. The process is complicated and the advantages of prefabrication and assembly cannot be fully utilized, resulting in limited improvement in construction efficiency.

[0006] (3) In modular concrete buildings, double-sided composite wall technology is commonly used for shear wall structures. A double-sided composite wall consists of two precast wall panels and a cavity in the middle. Interface connection reinforcement is usually embedded in the cavity to connect the two wall panels and enhance the overall load-bearing performance of the composite shear wall. When a structural beam needs to be connected to this double-sided composite shear wall, the longitudinal reinforcement of the beam must usually be anchored into the cavity of the composite wall and meet the load anchorage requirements. However, the interface connection reinforcement embedded in the cavity of the composite wall is densely arranged and intersects with the anchorage path of the bottom reinforcement of the beam, which can easily lead to spatial interference (commonly known as "fighting") between the bottom reinforcement of the beam and the interface connection reinforcement of the composite wall. This reinforcement conflict forces the reinforcement to avoid, bend or even cut on site, which seriously affects the construction efficiency and connection quality. On the other hand, the change of the anchorage position may weaken the reliable force transmission between the beam end and the wall, making it difficult to guarantee the seismic performance of the joint. Furthermore, the dense reinforcement configuration of the edge components of the composite wall further increases the difficulty of reliably anchoring the longitudinal reinforcement (including top and bottom reinforcement) at the beam ends according to the design position. Summary of the Invention

[0007] The first objective of this invention is to provide a vertical composite beam for modular composite shear walls that is simple and reasonable in structure, has good stress performance, is easy to assemble on site, and can reliably connect adjacent modular units.

[0008] The first objective of this invention is achieved through the following technical measures: a vertical composite beam for a modular composite shear wall, characterized in that it comprises two prefabricated composite beam portions arranged side by side, adjacent modular units, forming a cavity between the two prefabricated composite beam portions, each prefabricated composite beam portion having pre-embedded stirrups and longitudinal reinforcement, wherein the stirrups extend into the cavity and beam-slab joint area, and longitudinal bottom reinforcement and longitudinal top reinforcement are respectively provided at the bottom of the cavity and the beam-slab joint area, the protruding portion of the stirrups being fitted onto the longitudinal top reinforcement and longitudinal bottom reinforcement, the vertical composite beam being formed by one-time cast-in-place concrete in the cavity and beam-slab joint area, the end of the vertical composite beam being connected to the edge member of the composite shear wall, that is, the longitudinal bottom reinforcement and longitudinal top reinforcement of the vertical composite beam are anchored into the cast-in-place portion of the edge member of the composite shear wall and connected to the steel reinforcement skeleton therein, and the longitudinal reinforcement of the prefabricated composite beam portion is anchored into the prefabricated portion of the edge member of the composite shear wall.

[0009] This invention tightly integrates the prefabricated parts of adjacent modular units on the same floor with concrete, realizing a reliable connection between adjacent modular units in a modular building structure. It can effectively transfer the horizontal load between adjacent modular units and the load transferred from above, ensuring the overall stability and safety of the modular building structure. It solves the problem of beam bottom reinforcement anchoring into the composite shear wall reinforcement in the prior art. It has the advantages of simple and reasonable structure, good stress performance, easy on-site assembly, high construction efficiency, and reliable quality.

[0010] In this invention, the cross-sectional shape of the two prefabricated composite beams is either straight or one of the prefabricated composite beams has a straight cross-sectional shape and the other has an L-shaped cross-sectional shape. The stirrups of the two prefabricated composite beams are staggered or overlapped.

[0011] The present invention provides additional stirrups in the cast-in-place portion of the vertical composite beam. The additional stirrups are fitted onto the longitudinal top reinforcement and the longitudinal bottom reinforcement. The additional stirrups are arranged in parallel along the length of the beam and are set along the entire length of the beam or at both ends of the beam or in the middle of the beam span.

[0012] In this invention, the cross-sectional shape of the two precast composite beams is L-shaped, and the stirrups of the two precast composite beams are arranged opposite each other. Additional stirrups are provided in the cast-in-place part of the vertical composite beam, and the additional stirrups are fitted on the longitudinal top reinforcement and the longitudinal bottom reinforcement.

[0013] The bottom of the prefabricated composite beam of the present invention is a thickened area. The pre-embedded part of the stirrup is located on the side and bottom of the prefabricated composite beam to form a structural beam. Small-diameter longitudinal steel bars are provided in the thickened area. The small-diameter longitudinal steel bars are only anchored into the structural column and do not extend into the edge members of the composite shear wall.

[0014] The stirrups and additional stirrups described in this invention are closed stirrups or open stirrups.

[0015] In this invention, the prefabricated portion of the composite beam and the prefabricated layer of the composite slab in the same module unit are cast in one piece.

[0016] A second objective of this invention is to provide a construction method for the above-mentioned vertical composite beams used in modular composite shear walls.

[0017] The second objective of this invention is achieved through the following technical measures: a construction method for the above-mentioned vertical composite beams for modular composite shear walls, characterized by comprising the following steps:

[0018] S1. Prefabricate two relatively independent composite beam prefabricated parts of adjacent module units in the factory, connect the composite beam prefabricated parts with the composite slab prefabricated layer to form the beam slab prefabricated parts, and then anchor the longitudinal reinforcement of the composite beam prefabricated parts into the prefabricated parts of the edge members of the composite shear wall. After assembly, the module unit is obtained.

[0019] S2. Transport each module unit to the construction site, hoist horizontally adjacent module units so that the two prefabricated composite beams of adjacent module units are set opposite each other and form a cavity between them, and connect or stagger the protruding parts of the stirrups embedded in the prefabricated composite beams.

[0020] S3. Hoist the two precast composite beams into place, first install the steel reinforcement cage in the cast-in-place part of the composite shear wall edge member, place the longitudinal bottom reinforcement and longitudinal top reinforcement in the extended part of the stirrups of the precast composite beam so that the stirrups are wrapped on it, and then anchor the longitudinal bottom reinforcement and longitudinal top reinforcement at the end of the vertical composite beam into the cast-in-place part of the composite shear wall edge member and connect it with the steel reinforcement cage inside.

[0021] S4. Cast concrete in place at one time in the cavity between the two precast composite beams and the beam-slab joint area, and pour concrete in the cavity between the two precast composite shear wall sections, so that the precast composite beam sections of adjacent module units are combined into a vertical composite beam that bears the same load, and at the same time, the precast composite shear wall sections of adjacent module units are combined into a composite shear wall that bears the same load.

[0022] S5. Repeat steps S2 to S4 to complete the installation and connection of the prefabricated composite beams of the remaining adjacent module units.

[0023] In step S2 of the present invention, additional stirrups are provided in the cast-in-place portion of the vertical composite beam, and the additional stirrups are fitted onto the longitudinal top reinforcement and the longitudinal bottom reinforcement.

[0024] In step S1 of this invention, the prefabricated part of the composite beam and the prefabricated part of the composite slab of the same module unit are cast in one go; the prefabricated partition wall and the prefabricated composite shear wall are connected by a semi-flexible connection structure and cast in one go, and then the prefabricated partition wall and the prefabricated part of the composite beam are connected by a semi-flexible connection structure.

[0025] Compared with the prior art, the present invention has the following significant technical effects:

[0026] (1) The present invention integrates the prefabricated parts of the composite beam of adjacent modules in the factory. The stirrups of the composite beam are pre-embedded in the prefabricated part to form a load-bearing body. On site, only simple alignment operation, placement of longitudinal reinforcement of beam or additional stirrups and concrete pouring are required to achieve a reliable horizontal connection between adjacent modules. The operation is simple, the process is simplified, the construction speed is fast, which is in line with the concept of modular building and can significantly shorten the construction period.

[0027] (2) In the prior art, the bottom reinforcement of the beam must be anchored into the cavity of the double-sided composite wall, which is very easy to conflict with the dense interface connection reinforcement. In contrast, the present invention first installs the prefabricated parts of the two composite beams in place, so that the pre-reserved stirrups are lapped, and then the longitudinal reinforcement of the beam is placed in the cavity. Since the longitudinal reinforcement is inserted without interference, the path can be flexibly adjusted, completely avoiding the problem of "fighting" with the reinforcement in the composite wall. There is no need to bend or cut the reinforcement on site, which ensures the anchorage path and stress performance.

[0028] (3) The two precast beam shells with independent beam stirrups in this invention are used directly as permanent formwork on the construction site, and the precast beams participate in the structural stress. After the adjacent module beams are combined, they form a continuous component that cooperates in stress, ensuring the reliable connection of the structure and having good seismic performance.

[0029] (4) This invention is particularly applicable to modular buildings such as multi-story residential buildings, apartment dormitories, and hotels, and has good versatility and promotional value. Attached Figure Description

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] Figure 1 This is a schematic diagram of the planar arrangement of adjacent module units in Embodiment 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of the prefabricated vertical composite beam portion (not yet installed) in Embodiment 1 of the present invention.

[0033] Figure 3 This is a schematic diagram of the vertical composite beam node structure (installed in place) of Embodiment 1 of the present invention.

[0034] Figure 4This is a schematic diagram of the connection between the vertical composite beam and the modular composite shear wall in Embodiment 1 of the present invention;

[0035] Figure 5 This is a schematic elevation view of the connection between the vertical composite beam and the modular composite shear wall in Embodiment 1 of the present invention;

[0036] Figure 6 This is a schematic diagram of the prefabricated vertical composite beam portion (not yet installed) in Embodiment 2 of the present invention.

[0037] Figure 7 This is a schematic diagram of the vertical composite beam node structure (installed in place) of Embodiment 2 of the present invention.

[0038] Figure 8 This is a schematic diagram of the connection between the vertical composite beam and the modular composite shear wall in Embodiment 2 of the present invention;

[0039] Figure 9 This is a schematic diagram of the connection between the vertical composite beam and the modular composite shear wall in Embodiment 2 of the present invention.

[0040] Figure 10 This is a schematic diagram of the prefabricated vertical composite beam (installed in place) in Embodiment 3 of the present invention.

[0041] In the diagram: 1-First module unit; 2-Second module unit; 3-Precast part of composite beam; 4-Cavity; 5-Protruding part; 6-Stirrup; 7-Longitudinal reinforcement; 8-Beam-slab joint area; 9-Longitudinal bottom reinforcement; 10-Longitudinal top reinforcement; 11-Vertical composite beam; 12-Precast layer; 13-Cast-in-place layer; 14-Additional stirrup; 15-Edge member; 16-Reinforcing cage; 17-Thickened area; 18-Small diameter longitudinal reinforcement; 19-Structural column; 20-Lightweight partition wall; 21-Composite shear wall; 22-Non-edge area. Detailed Implementation

[0042] The present invention will be further described below through specific embodiments, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not depart from the basic idea of ​​the present invention, they are all within the protection scope of the present invention.

[0043] Example 1

[0044] like Figures 1-5As shown, the present invention discloses a vertical composite beam for modular composite shear walls, comprising two prefabricated composite beam portions 3 arranged side-by-side in adjacent modular units (first modular unit 1 and second modular unit 2). In this embodiment, the cross-sectional shape of both prefabricated composite beam portions 3 is straight, forming a cavity 4 between the two prefabricated composite beam portions 3. Each prefabricated composite beam portion 3 is pre-embedded with stirrups 6 and longitudinal reinforcement 7, wherein the stirrups 6 extend into the cavity 4 and the beam-slab joint area 8. The stirrups 6 can be closed stirrups or open stirrups. In this embodiment, the stirrups 6 of the two prefabricated composite beam portions 3 are staggered or staggered and overlapped. Longitudinal bottom reinforcement 9 and longitudinal top reinforcement 10 are respectively provided at the bottom of the cavity 4 and in the beam-slab joint area 8. The protruding portion 5 of the stirrups 6 is fitted onto the longitudinal top reinforcement 10 and the longitudinal bottom reinforcement 9, and the vertical composite beam 11 is formed by one-time cast-in-place concrete in the cavity 4 and the beam-slab joint area 8.

[0045] The precast part 3 of the composite beam and the precast layer 12 of the composite slab in the first module unit 1 are cast in one go. Similarly, the precast part 3 of the composite beam and the precast layer 12 of the composite slab in the second module unit 2 are also cast in one go. Concrete is poured on top of the precast layer 12 of the composite slab to form the cast-in-place layer 13 of the composite slab.

[0046] When the spacing of the stirrups exceeds the allowable value specified in the code, additional stirrups can be set between the transverse spacing of two stirrups and fixed within the cast-in-place portion of the vertical composite beam to enhance the bending and shear resistance of the vertical composite beam. In this embodiment, additional stirrups 14 are set in the cast-in-place portion of the vertical composite beam 11, and the additional stirrups 14 are fitted onto the longitudinal top reinforcement 10 and the longitudinal bottom reinforcement 9. Each additional stirrup 14 is arranged in parallel along the length of the beam and is set along the entire length. Alternatively, depending on the actual situation, the additional stirrups can be set at both ends of the beam or in the middle of the beam span.

[0047] The ends of the vertical composite beam 11 are connected to the edge members 15 of the composite shear wall 21 (such as hidden columns, end columns or L-shaped edge members; the composite shear wall 21 is a non-edge area 22 except for the edge area where the edge members 15 are set). That is, the longitudinal bottom reinforcement 9 and longitudinal top reinforcement 10 of the cast-in-place part of the vertical composite beam 11 are anchored into the cast-in-place part of the edge member 15 of the composite shear wall, and a reliable connection is achieved through the closed stirrups or interface reinforcement connectors (reinforcement cage 16) in the cast-in-place part of the edge member 15 of the composite shear wall. The longitudinal reinforcement 7 embedded in the precast part of the vertical composite beam is anchored into the precast part of the composite shear wall, and the anchorage length L of the longitudinal reinforcement 7 should meet the requirements of the specification.

[0048] A construction method for the above-mentioned vertical composite beams used in modular composite shear walls includes the following steps:

[0049] S1. Two relatively independent prefabricated composite beam parts 3 of adjacent modular units are prefabricated in the factory. The prefabricated composite beam parts 3 are connected to the prefabricated layer 12 of the composite slab to form the beam-slab prefabricated part. Then, the longitudinal reinforcement 7 of the prefabricated composite beam parts 3 is anchored into the prefabricated part of the edge member 15 of the composite shear wall. The anchorage length L of the longitudinal reinforcement 7 meets the structural anchorage requirements. Thus, the modular unit is obtained after the beam and slab, beam and wall connections and other components are assembled.

[0050] In this process, the precast parts of the composite beams and composite slabs of the same module unit are cast in one go; the precast partition walls and precast composite shear walls are connected by a semi-flexible connection structure and cast in one go, and then the precast partition walls and precast parts of the composite beams are connected by a semi-flexible connection structure.

[0051] S2. Transport each module unit to the construction site, hoist horizontally adjacent module units so that the two prefabricated composite beam parts 3 of the adjacent module units are set opposite each other and form a cavity 4 between them, and connect or stagger the protruding parts 5 of the closed stirrups embedded in the prefabricated composite beam parts 3.

[0052] When the spacing of the closed stirrups exceeds the allowable value specified in the code, additional stirrups 14 can be set between the transverse spacing of the two closed stirrups 6 and fixed in the cast-in-place part of the vertical composite beam 11 to enhance the bending bearing capacity and shear capacity of the vertical composite beam.

[0053] S3. Hoist the two precast composite beam sections 3 into place. First, install the reinforcing cage (reinforcing cage 16) in the cast-in-place portion of the composite shear wall edge member 15. Then, place the longitudinal bottom reinforcement 9 and longitudinal top reinforcement 10 of the composite beam in the extended portion 5 of the closed stirrups of the precast composite beam section 3, so that the stirrups are fitted onto the longitudinal bottom reinforcement 9 and longitudinal top reinforcement 10. At this time, the closed stirrups, additional stirrups, and longitudinal reinforcement of the two separate precast composite beam sections together form a complete reinforcing cage. Then, anchor the longitudinal bottom reinforcement 9 and longitudinal top reinforcement 10 of the cast-in-place portion located at the beam end into the cast-in-place portion of the composite shear wall edge member 15 and connect it with the reinforcing cage 16 to connect the composite shear wall of the adjacent module unit.

[0054] S4. Concrete is poured in place at one time in the cavity 4 between the two precast composite beams 3 and the beam-slab joint area 8, and concrete is poured in the cavity between the two precast composite shear wall 21, so that the precast composite beams 3 of the adjacent module units are combined into a vertical composite beam 11 that bears the same force, and at the same time, the precast composite shear wall parts of the adjacent module units are combined into a composite shear wall that bears the same force.

[0055] S5. Repeat steps S2 to S4 to complete the installation and connection of the prefabricated composite beams of the remaining adjacent module units.

[0056] Example 2

[0057] like Figures 6-9 As shown, the difference between this embodiment and Embodiment 1 is that the cross-sectional shape of the two precast composite beams 3 in adjacent module units is L-shaped. The bottoms of the two precast composite beams 3 abut each other, and the stirrups 6 of the two precast composite beams 3 extend beyond the centerline of the cast-in-place part and are symmetrically arranged with the centerline as the axis. That is, the stirrups 6 of the two precast composite beams 3 are arranged opposite each other. Additional stirrups 14 are set in the cast-in-place part and are fitted on the longitudinal bottom reinforcement 9 and the longitudinal top reinforcement 10. The bottom of the precast composite beam 3 is a thickened area 17. The embedded part of the stirrups 6 is located on the side of the precast composite beam 3 and forms a structural beam with the thickened area 17. Small-diameter longitudinal steel bars 18 (diameter 8mm, longitudinal bottom reinforcement 9 and longitudinal top reinforcement 10 diameter are 25mm) are provided in the thickened area 17. The small-diameter longitudinal steel bars 18 are only anchored into the structural column 19 and do not extend into the edge member 15 of the composite shear wall. See Figure 8 and Figure 9 The beam body of the vertical composite beam 11 is connected to the lightweight partition wall 20.

[0058] Example 3

[0059] like Figure 10 As shown, the difference between this embodiment and Embodiment 2 is that one of the prefabricated sections of the two composite beams has a straight cross-sectional shape, while the other has an L-shaped cross-sectional shape. The bottoms of the two prefabricated sections of the composite beams abut each other, and the stirrups 6 of the two prefabricated sections of the composite beams are staggered or staggered in overlap. Specifically, the stirrups 6 of the prefabricated section of the straight composite beam are fitted onto the longitudinal bottom reinforcement 9 and the longitudinal top reinforcement 10, while the stirrups 6 of the prefabricated section of the L-shaped composite beam are fitted onto the longitudinal top reinforcement 10.

[0060] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A vertical composite beam for modular composite shear walls, characterized in that: The system comprises two prefabricated composite beams arranged side-by-side in adjacent modular units, forming a cavity between the two prefabricated composite beams. Each prefabricated composite beam contains embedded stirrups and longitudinal reinforcement bars, with the stirrups extending into the cavity and beam-slab joint area. Longitudinal bottom reinforcement bars and longitudinal top reinforcement bars are respectively provided at the bottom of the cavity and the beam-slab joint area. The protruding parts of the stirrups are fitted onto the longitudinal top reinforcement bars and longitudinal bottom reinforcement bars. Vertical composite beams are formed by casting concrete in the cavity and beam-slab joint area at one time. The ends of the vertical composite beams are connected to the edge members of the composite shear wall. That is, the longitudinal bottom reinforcement bars and longitudinal top reinforcement bars of the vertical composite beams are anchored into the cast-in-place part of the edge members of the composite shear wall and connected to the steel reinforcement skeleton inside them. The longitudinal reinforcement bars of the prefabricated composite beams are anchored into the prefabricated part of the edge members of the composite shear wall.

2. The vertical composite beam for modular composite shear walls according to claim 1, characterized in that: The cross-sectional shape of the two precast composite beams is either straight or one of the precast composite beams has a straight cross-sectional shape and the other has an L-shaped cross-sectional shape. The stirrups of the two precast composite beams are staggered or overlapped.

3. The vertical composite beam for modular composite shear walls according to claim 2, characterized in that: Additional stirrups are provided in the cast-in-place portion of the vertical composite beam. The additional stirrups are fitted onto the longitudinal top reinforcement and longitudinal bottom reinforcement. The additional stirrups are arranged in parallel along the length of the beam and are set along the entire length of the beam or at both ends of the beam or in the middle of the beam span.

4. The vertical composite beam for modular composite shear walls according to claim 1, characterized in that: The two precast composite beams have L-shaped cross sections. The stirrups of the two precast composite beams are arranged opposite each other. Additional stirrups are provided in the cast-in-place part of the vertical composite beam. The additional stirrups are fitted onto the longitudinal top reinforcement and the longitudinal bottom reinforcement.

5. The vertical composite beam for modular composite shear walls according to claim 4, characterized in that: The bottom of the precast composite beam is a thickened area. The pre-embedded part of the stirrup is located on the side and bottom of the precast composite beam to form a structural beam. Small-diameter longitudinal steel bars are provided in the thickened area. The small-diameter longitudinal steel bars are only anchored into the structural column and do not extend into the edge members of the composite shear wall.

6. The vertical composite beam for modular composite shear walls according to any one of claims 3 to 5, characterized in that: The stirrups and additional stirrups are either closed stirrups or open stirrups.

7. The vertical composite beam for modular composite shear walls according to claim 6, characterized in that: The precast parts of the composite beams and the precast layers of the composite slabs in the same module unit are cast in one go.

8. A construction method for the vertical composite beam of a modular composite shear wall as described in claim 1, characterized in that... Includes the following steps: S1. Prefabricate two relatively independent composite beam prefabricated parts of adjacent module units in the factory, connect the composite beam prefabricated parts with the composite slab prefabricated layer to form the beam slab prefabricated parts, and then anchor the longitudinal reinforcement of the composite beam prefabricated parts into the prefabricated parts of the edge members of the composite shear wall. After assembly, the module unit is obtained. S2. Transport each module unit to the construction site, hoist horizontally adjacent module units so that the two prefabricated composite beams of adjacent module units are set opposite each other and form a cavity between them, and connect or stagger the protruding parts of the stirrups embedded in the prefabricated composite beams. S3. Hoist the two precast composite beams into place, first install the steel reinforcement cage in the cast-in-place part of the composite shear wall edge member, place the longitudinal bottom reinforcement and longitudinal top reinforcement in the extended part of the stirrups of the precast composite beam so that the stirrups are wrapped on it, and then anchor the longitudinal bottom reinforcement and longitudinal top reinforcement at the end of the vertical composite beam into the cast-in-place part of the composite shear wall edge member and connect it with the steel reinforcement cage inside. S4. Concrete is poured in place at one time in the cavity between the two precast composite beams and the beam-slab joint area, and concrete is poured in the cavity between the two precast composite shear wall sections, so that the precast composite beam sections of adjacent module units are combined into vertical composite beams that share the load, and at the same time, the precast composite shear wall sections of adjacent module units are combined into composite shear walls that share the load. S5. Repeat steps S2 to S4 to complete the installation and connection of the prefabricated composite beams of the remaining adjacent module units.

9. The construction method according to claim 8, characterized in that: In step S2, additional stirrups are provided in the cast-in-place portion of the vertical composite beam, and the additional stirrups are fitted onto the longitudinal top reinforcement and longitudinal bottom reinforcement.

10. The construction method according to claim 9, characterized in that: In step S1, the precast parts of the composite beams and composite slabs of the same module unit are cast in one go; the precast partition walls and precast composite shear walls are connected by a semi-flexible connection structure and cast in one go, and then the precast partition walls and precast parts of the composite beams are connected by a semi-flexible connection structure.

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