Self-resetting shear wall structure with gradient energy consumption
By using a gradient energy dissipation self-resetting shear wall structure, which combines profiled web steel beams and SMA steel strands, multi-level energy dissipation and automatic resetting are achieved. This solves the adaptability problem of traditional shear walls under different earthquake magnitudes and improves the seismic toughness and rapid recovery capability of the structure throughout its entire life cycle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SEISMOLOGICAL BUREAU OF SHAANXI PROVINCE
- Filing Date
- 2025-04-17
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional shear wall structures suffer from premature energy dissipation during minor earthquakes, affecting their normal performance. During major earthquakes, their energy dissipation capacity is insufficient, and the working mechanism of self-resetting devices and energy dissipation components is unclear, which limits the application of these structures in strong earthquake zones.
The self-resetting shear wall structure with gradient energy dissipation achieves multi-level coordinated energy dissipation through the combination of profiled web steel beams, SMA steel strands and modular wall units. This includes the coordinated work of SMA spring damping mechanism, prestressed steel strands and cross SMA steel strands, providing multi-level energy dissipation and automatic reset functions.
The structure can achieve gradient energy dissipation under different earthquake intensities, protect structural integrity, quickly restore function, improve construction efficiency, adapt to the needs of multiple earthquake magnitudes, and ensure the safety and stability of the structure under minor, moderate and major earthquakes.
Smart Images
Figure CN224133984U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of seismic resistance technology of building structures, and specifically relates to a self-resetting shear wall structure with gradient energy dissipation. Background Technology
[0002] As the concept of seismic design in buildings evolves from "collapse resistance" to "recoverable function," the energy dissipation mechanism and damage control capability of shear walls, as the main lateral force resisting components of high-rise buildings, have become a research focus. Traditional reinforced concrete shear walls achieve seismic resistance by concentrating energy dissipation in plastic hinge zones, but this results in problems such as large residual deformation and difficulties in post-earthquake repair. While self-resetting shear wall technologies developed in recent years (such as prestressed concrete shear walls and shape memory alloy reinforced shear walls) can effectively reduce residual deformation, they have revealed two major technical bottlenecks in practical applications: First, a single energy dissipation mechanism is difficult to match the demands of multiple seismic intensity levels; premature energy dissipation during minor earthquakes affects the normal serviceability of the structure, while major earthquakes pose a risk of insufficient energy dissipation capacity. Second, the collaborative working mechanism between existing self-resetting devices and energy dissipation components is unclear, and damage to energy dissipation components significantly weakens the reset efficiency.
[0003] Current solutions often employ simple placement of dampers to achieve structural energy dissipation. This can lead to cumulative damage to energy-dissipating components until the dampers cease functioning, causing a sudden change in structural stiffness. These systemic defects severely restrict the widespread application of single-damper energy-dissipating shear walls in strong earthquake zones. There is an urgent need to establish a dynamic synergistic relationship between graded energy dissipation and self-resetting mechanisms through innovative structural design, so as to achieve continuous gradient response of the structure during the energy dissipation process and protect the self-resetting structure to perform its own recoverable function. This is the core starting point of this patent research. Utility Model Content
[0004] To address the technical bottlenecks of existing shear wall structures, such as the irreversible energy dissipation mechanism, significant attenuation of the reset efficiency of energy dissipation components, and insufficient adaptability to multiple earthquake magnitudes, this utility model proposes a self-resetting shear wall structure with gradient energy dissipation. The aim is to achieve the orderly release of seismic energy and the sustainable maintenance of the structure's self-resetting function through an innovative multi-level collaborative energy dissipation system.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A self-resetting shear wall structure with gradient energy dissipation includes a profiled web steel beam. The upper and lower sides of the profiled web steel beam are connected to symmetrically arranged first and second modular wall units. Each of the first and second modular wall units includes two or more modular walls arranged side by side. Adjacent sides of adjacent modular walls are connected by SMA spring damping mechanisms. The profiled web steel beam has SMA steel strands arranged in a cross pattern along its length. The two ends of the SMA steel strands are fixedly connected to the profiled web steel beam. Each modular wall has a steel strand tray at the center of its surface and prestressed steel strands connected to its four corners. The prestressed steel strands are connected to the steel strand tray.
[0007] Preferably, the profiled web steel beam includes a profiled steel web, with steel flanges on both the upper and lower sides. The upper steel flange is connected to the bottom of the modular wall of the first modular wall unit, and the lower steel flange is connected to the top of the modular wall of the second modular wall unit. SMA steel strands are located between the upper and lower steel flanges, and the two ends of each SMA steel strand are connected to the upper and lower steel flanges respectively.
[0008] Preferably, the profiled steel web is connected to the upper and lower steel flanges to form an I-shaped steel beam, wherein both the upper and lower ends of the profiled steel web are welded to the steel flanges.
[0009] Preferably, the lateral distance between the two ends of each SMA steel strand is not less than the center distance between two adjacent modular walls, the intersection point of two intersecting SMA steel strands is located on the symmetrical plane of two adjacent modular walls, and the two intersecting SMA steel strands are symmetrically arranged about the symmetrical plane.
[0010] Preferably, the modular wall includes a steel plate wall and steel wing plates disposed on both sides of the steel plate wall. The steel wing plates are welded to the steel plate wall, and a steel strand tray is disposed at the center of the steel plate wall. One end of the prestressed steel strand is connected to the steel strand tray, and the other end is anchored to the steel wing plate.
[0011] Preferably, a lead-core rubber pad is provided between the center of the steel strand tray and the surface of the modular wall, and the lead-core rubber pad is bonded to the steel strand tray and the modular wall.
[0012] Preferably, a connector is provided between the lead-core rubber pad and the modular wall, and the radial dimension of the connector is larger than the radial dimension of the lead-core rubber pad.
[0013] Preferably, in each modular wall, the extension lines of the four prestressed steel strands all pass through the center of the steel strand tray.
[0014] Preferably, the SMA spring damping mechanism is detachably connected to the modular wall.
[0015] Preferably, the SMA spring damping mechanism includes an SMA spring, with a first connecting post and a second connecting post connected to both ends of the SMA spring, the first connecting post being detachably connected to a first node plate, and the second connecting post being detachably connected to a second node plate, wherein the second connecting post and the second node plate are respectively fixedly connected to the side of an adjacent modular wall.
[0016] The detachable connection method uses bolt connection or snap-fit structure.
[0017] This utility model has the following beneficial effects:
[0018] In this utility model of a self-resetting shear wall structure with gradient energy dissipation, under minor and moderate earthquakes, the first and second modular wall units can automatically reset after energy dissipation and vibration reduction by the damping component profiled web steel beam, protecting the integrity of the wall structure and facilitating rapid restoration of normal functionality after an earthquake. An SMA spring damping mechanism and SMA steel strands are incorporated; the SMA material has shape memory function, achieving an automatic reset effect for the wall. The web of the profiled web steel beam adopts a wave shape, providing vertical bearing capacity while allowing for sufficient horizontal extension, achieving good energy dissipation. The SMA spring damping mechanism is located between adjacent modular walls, facilitating rapid replacement in case of damage during earthquakes or routine maintenance. The modular walls can be prefabricated and assembled, improving construction efficiency. In summary, this utility model of a self-resetting shear wall with gradient energy dissipation can achieve gradient energy dissipation under different earthquake intensities, protecting the structure from damage and quickly restoring normal functionality after an earthquake. Furthermore, under minor and moderate earthquakes, the structure can automatically reset after energy-dissipating deformation, protecting the safety and stability of the wall structure. Some components of this wall structure can be assembled, improving construction efficiency and demonstrating significant advantages, making it widely applicable. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the self-resetting shear wall structure with gradient energy dissipation according to this utility model.
[0020] Figure 2 This is a side view of the self-resetting shear wall structure with gradient energy dissipation according to this utility model.
[0021] Figure 3 This is a schematic diagram of the modular wall structure of this utility model.
[0022] Figure 4 This is a schematic diagram of the steel strand tray of this utility model.
[0023] Figure 5 This is a schematic diagram of the profiled web steel beam of this utility model.
[0024] Figure 6 This is a schematic diagram of the profiled steel sheet of this utility model.
[0025] Figure 7 This is a schematic diagram of the SMA spring damping mechanism of this utility model.
[0026] In the diagram, Ⅰ-modular wall; Ⅱ-profiled web steel beam; Ⅲ-SMA spring damping mechanism; 1-steel plate wall; 1-1-steel wing plate; 2-steel strand tray; 3-prestressed steel strand; 4-anchor plate; 6-SMA steel strand; 7-first node plate; 8-first connecting column; 9-protective cover; 10-SMA spring; 11-second connecting column; 12-second node plate; 2-1-bolt hole; 2-2-lead core rubber pad; 2-3-connector; 5-1-steel flange; 5-2-profiled steel web. Detailed Implementation
[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0028] See Figures 1-7 This embodiment features a gradient energy-dissipating self-resetting shear wall structure, including a profiled web steel beam II. Symmetrically arranged first and second modular wall units are connected to the upper and lower sides of the profiled web steel beam II. Each of the first and second modular wall units includes two or more modular walls arranged side-by-side. An SMA spring damping mechanism III connects the adjacent sides of adjacent modular walls. The profiled web steel beam II has SMA steel strands 6 arranged in a crisscross pattern along its length, with both ends of the SMA steel strands 6 fixedly connected to the profiled web steel beam II. Each modular wall has a steel strand tray 2 at its center and prestressed steel strands 3 connected to its four corners. The prestressed steel strands 3 are connected to the steel strand tray 2. In this embodiment, the SMA spring damping mechanism III is installed between the modular walls. During minor earthquakes, the SMA spring damping mechanism III dissipates seismic energy through hyperelastic deformation, and the automatic reset function of the SMA springs ensures that the structure can return to its original position after a minor earthquake. During moderate earthquakes, the profiled web steel beam II begins the plastic yielding stage, and the second gradient of energy dissipation is achieved through the direction of the web corrugations of the profiled web steel beam II. At the same time, the energy dissipation and automatic reset of the profiled web steel beam II are achieved through a set of cross-arranged SMA steel strands 6. During major earthquakes, the prestressed steel strands 3 inside the modular wall body start working, undertaking the third gradient of energy dissipation as a backup, and cooperating with the continuous reset function of the SMA springs in the SMA spring damping mechanism III.
[0029] In a preferred embodiment of this utility model, the profiled web steel beam II specifically includes a profiled steel web 5-2, wherein the profiled steel web 5-2 is a corrugated steel plate, and steel flanges 5-1 are provided on both the upper and lower sides of the profiled steel web 5-2. The upper steel flange is connected to the bottom of the modular wall of the first modular wall unit, and the lower steel flange is connected to the top of the modular wall of the second modular wall unit. SMA steel strands 6 are located between the upper and lower steel flanges, and the two ends of each SMA steel strand 6 are connected to the upper and lower steel flanges respectively, so that two SMA steel strands 6 form a cross structure.
[0030] As a preferred embodiment of this utility model, this embodiment, based on the above embodiment, forms an I-shaped steel beam by connecting the profiled steel web 5-2 with the upper and lower steel flanges 5-1, wherein both the upper and lower ends of the profiled steel web 5-2 are welded to the steel flanges. This structure is simple and reliable.
[0031] In a preferred embodiment of this utility model, the lateral distance between the two ends of each SMA steel strand 6 is not less than the center-to-center distance between two adjacent modular walls. The intersection point of two intersecting SMA steel strands 6 is located on the symmetrical plane of two adjacent modular walls, and the two intersecting SMA steel strands 6 are symmetrically arranged about this symmetrical plane. Specifically, Figure 1 For example, the left and right ends of each SMA steel strand 6 are located to the left of the center of the left modular wall and to the right of the center of the right modular wall, respectively, which can improve the stability of the entire profiled web steel beam II.
[0032] As a preferred embodiment of this utility model, in this embodiment, see [reference needed]. Figure 2 The modular wall includes a steel plate wall 1 and steel wing plates 1-1 set on both sides of the steel plate wall 1. The steel wing plates 1-1 are welded to the steel plate wall 1. The steel strand tray 2 is set at the center of the steel plate wall 1. One end of the prestressed steel strand 3 is connected to the steel strand tray 2 and the other end is anchored to the steel wing plate 1-1.
[0033] As a preferred embodiment of this utility model, in this embodiment, see [reference needed]. Figure 2 A lead-core rubber pad 2-2 is provided between the steel strand tray 2 and the center of the modular wall surface. The lead-core rubber pad 2-2 is bonded to the steel strand tray 2 and the modular wall. The lead-core rubber pad 2-2 can be used for out-of-plane vibration damping.
[0034] As a preferred embodiment of this utility model, see [link to embodiment]. Figure 2 and Figure 3In this embodiment, a connector 2-3 is provided between the lead-core rubber pad 2-2 and the modular wall, and the radial dimension of the connector 2-3 is larger than the radial dimension of the lead-core rubber pad 2-2. This connector 2-3 can improve the stability of the surface connection between the lead-core rubber pad 2-2 and the modular wall.
[0035] In a preferred embodiment of this invention, in each modular wall, the extension lines of the four prestressed steel strands 3 all pass through the center of the steel strand tray 2. This avoids the prestressed steel strands 3 exerting torque on the steel strand tray 2 after being accepted, thus preventing a reduction in seismic resistance.
[0036] In a preferred embodiment of this invention, the SMA spring damping mechanism III is detachably connected to the modular wall. This facilitates timely replacement of the SMA spring damping mechanism III.
[0037] As a preferred embodiment of this utility model, see [link to embodiment]. Figure 7 and Figure 1 In this embodiment, the SMA spring damping mechanism III includes an SMA spring 10. A first connecting post 8 and a second connecting post 11 are respectively connected to both ends of the SMA spring 10. The first connecting post 8 is detachably connected to a first node plate 7, and the second connecting post 11 is detachably connected to a second node plate 12. The second connecting post 11 and the second node plate 12 are respectively fixedly connected to the sides of adjacent modular walls. The detachable connection can be achieved using bolt connections or snap-fit structures. Furthermore, protective covers 9 can be provided at both ends of the SMA spring 10 to slow down the corrosion process at both ends and extend its service life.
[0038] Example 1
[0039] This embodiment features a gradient energy-dissipating self-resetting shear wall structure, including a modular wall I, an energy-dissipating steel beam II, an SMA spring damping mechanism III, a steel plate wall 1, a steel strand tray 2, prestressed steel strands 3, an anchor plate 4, SMA steel strands 6, a first node plate 7, a first connecting column 8, a protective cover 9, an SMA spring 10, a second connecting column 11, a second node plate 12, lead-core rubber pads 2-2, connectors 2-3, steel flanges 5-1, and profiled steel webs 5-2.
[0040] The modular wall assembly consists of three main parts: modular wall I, energy-dissipating steel beam II, and SMA spring damping mechanism III. Modular wall I includes steel plate wall 1, steel strand tray 2, lead-core rubber pad 2-2, connector 2-3, prestressed steel strand 3, and anchor plate 4. Energy-dissipating steel beam assembly II includes steel flange 5-1, profiled steel web 5-2, and SMA steel strand 6. SMA spring damping mechanism III mainly includes first node plate 7, first connecting column 8, protective chamber 9, SMA spring 10, second connecting column 11, and second node plate 12.
[0041] like Figure 1 As shown, the main structure of the gradient energy-dissipating self-resetting shear wall structure consists of four modular wall sections I. The modular wall sections I are connected horizontally via an SMA spring damping mechanism III and longitudinally via energy-dissipating steel beams II.
[0042] like Figures 1-3 As shown, a steel strand tray 2 is installed at the center of the surface of the modular wall I. A lead-core rubber pad 2-2 is placed behind the steel strand tray 2 for out-of-plane damping. A connector 2-3 is fixedly connected to the surface of the steel plate wall 1. The bottom of the lead-core rubber pad 2-2 is fixedly connected to the top of the connector 2-3, and the top of the lead-core rubber pad 2-2 is fixedly connected to the bottom of the steel strand tray 2. The modular wall I includes four prestressed steel strands 3. One end of each prestressed steel strand 3 is fixed to the steel strand tray 2, and the other end is fixed to an anchor plate 4. The anchor plate 4 is fixed to the steel wing plate 1-1 of the modular wall I, realizing the deformation coordination and self-resetting function of the modular wall I during earthquakes.
[0043] like Figures 5-6 As shown, the gradient energy-dissipating self-resetting shear wall structure includes a set of profiled web steel beams II in the middle. The top of the profiled web steel beams II is fixedly connected to the bottom of the upper steel plate wall 1, and the bottom of the profiled web steel beams II is fixedly connected to the top of the lower steel plate wall 1. The profiled steel web 5-2 of the profiled web steel beams II is made of corrugated profiled steel sheet, which has a certain degree of ductility in the horizontal direction and can deform to dissipate energy. There is a set of cross SMA steel strands 6 in the middle of the profiled web steel beams II, which can realize the energy dissipation and automatic resetting of the self-resetting shear wall in the horizontal direction.
[0044] like Figure 7 As shown and combined Figure 1 , Figure 2 The first node plate 7 of the SMA spring damping mechanism III is fixedly connected to the right steel plate of the left steel plate wall 1, and the second node plate 12 is fixedly connected to the left steel plate of the right steel plate wall 1. The first connecting post 8 is snapped onto the first node plate 7, and the second connecting post 11 is snapped onto the second node plate 12. The protective cover 9 is fixedly connected to the first connecting post 8. One end of the SMA spring 10 is fixedly connected to the second connecting post 11, and the other end is located in the protective cover 9 and fixedly connected to it, which can protect the spring from corrosion. The above-mentioned snapping method adopts a longitudinal slot and protrusion matching method, such as trapezoidal or dovetail slots corresponding to trapezoidal or dovetail protrusions, so that the first connecting post 8 can be snapped onto the first node plate 7 from top to bottom, and the second connecting post 11 can be snapped onto the second node plate 12 from top to bottom.
[0045] like Figure 1 , Figure 7As shown, the SMA spring damping mechanism III is snapped together with the two modular wall panels I, making construction quick and convenient, and allowing for rapid replacement in case of post-earthquake damage.
[0046] like Figure 1 , Figure 2 As shown, the self-resetting shear wall structure with gradient energy dissipation achieves energy dissipation and vibration reduction at three gradients. During minor earthquakes, the SMA spring damping mechanism III dissipates seismic energy through hyperelastic deformation, and the automatic reset function of the SMA springs ensures that the structure can return to its original position after a minor earthquake. During moderate earthquakes, the energy-dissipating steel beam II begins its plastic yielding stage, achieving the second gradient of energy dissipation through the direction of the web corrugations, and achieving energy dissipation and automatic reset through the intersecting SMA steel strands 6. During major earthquakes, the prestressed steel strands inside the modular wall I start working, undertaking the third gradient of energy dissipation as a safety net, in conjunction with the continuous reset function of the SMA springs.
[0047] Traditional reinforced concrete shear walls suffer from premature energy depletion of the elastic potential energy of damping components during minor earthquakes, while insufficient energy dissipation capacity during major earthquakes leads to irreversible structural damage. The core design of this invention lies in establishing a progressive energy dissipation mechanism: First, during minor earthquakes, a shape memory alloy (SMA) spring damping mechanism acts as the first line of defense, dissipating seismic energy through hyperelastic deformation. Simultaneously, the austenitic phase transformation characteristics of the SMA material provide self-resetting capability. Second, when the earthquake reaches the intermediate earthquake range, the profiled web steel beams enter the plastic yielding stage, achieving a second-gradient energy dissipation through the directional folding of the web corrugations, thus increasing the energy dissipation contribution rate at this stage. Finally, during major earthquakes, the prestressed steel strands inside the modular wall activate, undertaking the third-gradient energy dissipation as a safety net, and, in conjunction with the continuous reset function of the SMA springs, ensuring the structural residual deformation rate. The breakthrough of this utility model lies in: ① the stiffness matching design of the SMA springs, profiled steel beams, and prestressed steel strands, enabling the shear wall to achieve gradient energy dissipation and automatic reset under different earthquake intensities; ② the modular assembly structure of the SMA spring damping mechanism allows for rapid repair of replaceable components after a major earthquake. This structural system significantly improves the seismic toughness of the self-resetting shear wall throughout its entire life cycle, providing an innovative solution for the resilient functional design of high-rise buildings.
[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.
Claims
1. A self-centering shear wall structure with gradient energy dissipation, characterized in that, The structure includes a profiled web steel beam (II), with a first modular wall unit and a second modular wall unit symmetrically arranged on the upper and lower sides of the profiled web steel beam (II). Each of the first and second modular wall units includes two or more modular walls arranged side by side. An SMA spring damping mechanism (III) is connected between the adjacent sides of the adjacent modular walls. The profiled web steel beam (II) has SMA steel strands (6) arranged in a cross pattern along its length. The two ends of the SMA steel strands (6) are fixedly connected to the profiled web steel beam (II) respectively. Each modular wall has a steel strand tray (2) at the center of its surface and prestressed steel strands (3) connected at each of its four corners. The prestressed steel strands (3) are connected to the steel strand tray (2).
2. The self-centering shear wall structure of claim 1, wherein, The profiled web steel beam (II) includes a profiled steel web (5-2), and steel flanges (5-1) are provided on both the upper and lower sides of the profiled steel web (5-2). The upper steel flange is connected to the bottom of the modular wall of the first modular wall unit, and the lower steel flange is connected to the top of the modular wall of the second modular wall unit. SMA steel strands (6) are located between the upper and lower steel flanges, and the two ends of each SMA steel strand (6) are connected to the upper and lower steel flanges respectively.
3. The self-centering shear wall structure of claim 2, wherein, The profiled steel web (5-2) is connected to the upper and lower steel flanges (5-1) to form an I-beam. The upper and lower ends of the profiled steel web (5-2) are welded to the steel flanges.
4. The self-centering shear wall structure of claim 1, wherein, The lateral distance between the two ends of each SMA steel strand (6) is not less than the center distance between two adjacent modular walls. The intersection point of the two SMA steel strands (6) is located on the symmetrical plane of the two adjacent modular walls. The two SMA steel strands (6) are symmetrically arranged about the symmetrical plane.
5. The self-centering shear wall structure of claim 1, wherein, The modular wall includes a steel plate wall (1) and steel wing plates (1-1) set on both sides of the steel plate wall (1). The steel wing plates (1-1) are welded to the steel plate wall (1). The steel strand tray (2) is set at the center of the steel plate wall (1). One end of the prestressed steel strand (3) is connected to the steel strand tray (2) and the other end is anchored to the steel wing plate (1-1).
6. The self-centering shear wall structure of claim 1, wherein, A lead-core rubber pad (2-2) is provided between the steel strand tray (2) and the center of the surface of the modular wall. The lead-core rubber pad (2-2) is bonded to the steel strand tray (2) and the modular wall.
7. The gradient-energy-dissipation self-centering shear wall structure according to claim 6, characterized in that, A connector (2-3) is provided between the lead-core rubber pad (2-2) and the modular wall. The radial dimension of the connector (2-3) is larger than the radial dimension of the lead-core rubber pad (2-2).
8. The self-centering shear wall structure of claim 1, wherein, In each modular wall, the extensions of the four prestressed steel strands (3) all pass through the center of the steel strand tray (2).
9. The self-centering shear wall structure of claim 1, wherein, The SMA spring damping mechanism (Ⅲ) is detachably connected to the modular wall.
10. The self-centering shear wall structure of graded energy dissipation according to claim 9, wherein, The SMA spring damping mechanism (Ⅲ) includes an SMA spring (10), with a first connecting column (8) and a second connecting column (11) connected to both ends of the SMA spring (10). The first connecting column (8) is detachably connected to a first node plate (7), and the second connecting column (11) is detachably connected to a second node plate (12). The second connecting column (11) and the second node plate (12) are respectively fixedly connected to the side of the adjacent modular wall. The detachable connection method uses bolt connection or snap-fit structure.