Combined steel plate shear wall with negative Poisson's ratio structure
By introducing a negative Poisson's ratio structure and lightweight concrete into the steel plate shear wall, combined with concave hexagonal openings and edge members, the problem of out-of-plane buckling deformation of the steel plate shear wall under seismic loading was solved, achieving higher initial stiffness and bearing capacity, reducing self-weight, and optimizing seismic and blast resistance performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU TONGCHENG ENG CONSTR CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-17
AI Technical Summary
Existing steel plate shear walls are prone to forming tensile bands under seismic loading, leading to out-of-plane buckling deformation. They also have a large self-weight, which affects the seismic performance of the structure and the load-bearing capacity of the frame beams and columns.
A composite steel plate shear wall with a negative Poisson's ratio structure is adopted. By setting concave hexagonal holes and edge members on the outer steel plate and combining it with lightweight concrete, the properties of the negative Poisson's ratio material are used to provide 'tension' and 'compression' effects, which enhance the initial stiffness and load-bearing capacity of the steel plate. The out-of-plane buckling of the steel plate is controlled by tie bolt connection.
It effectively controls the out-of-plane buckling deformation of steel plates, improves seismic and blast resistance, reduces structural self-weight, optimizes the hysteresis curve area, and reduces the burden on frame beams and columns.
Smart Images
Figure CN224133983U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated building structure technology, specifically to a composite steel plate shear wall with a negative Poisson's ratio structure. Background Technology
[0002] Traditional seismic design of structures mainly considers two aspects: increasing the strength or stiffness of the structure to resist seismic forces. However, this often comes with the increase of materials, higher economic costs, and increased structural weight, which is not in line with the rapid development of cities. Therefore, steel plate shear walls, as a new type of lateral force resisting component, have been gradually developed since the 1970s. After more than 40 years of research and exploration, steel plate shear walls have been proven to be an excellent wind-resistant, earthquake-resistant, and lateral force resisting component, and are gradually being used in high-rise and super high-rise steel structure buildings.
[0003] Steel plate shear walls, as lateral force resisting components, possess high stiffness, load-bearing capacity, and excellent energy dissipation capabilities. They are structurally lightweight and flexible in arrangement. During an earthquake, steel plate shear walls act as the first line of defense in a building structure, dissipating seismic energy through plastic deformation caused by their own yielding. This weakens the energy input from the earthquake to other structural components, ensuring the safety of the main structure. Furthermore, as a prefabricated component, steel plate shear walls can be quickly replaced after failure, enabling rapid post-earthquake repair. However, this energy dissipation mode results in significant out-of-plane buckling of the steel plates, and the alternating buckling waveforms are accompanied by loud noises that can easily cause panic among residents. The hysteresis curves also exhibit varying degrees of pinching. Additionally, the embedded steel plates exert significant distributed forces on the surrounding frame beams and columns, increasing the load on the frame structure.
[0004] With the continuous integration and development of materials engineering and structural engineering, more and more new materials are being applied to structural design. Negative Poisson's ratio materials, due to their unique internal cellular structure, possess special physical properties. Macroscopically, they exhibit lateral expansion under axial tension and lateral contraction under axial compression. This unique cellular structure gives them advantages in shear modulus, impact toughness, and energy absorption performance, making them promising for development in the field of construction engineering. Concave structures are the most classic form of negative Poisson's ratio structure; concave hexagonal structures, concave triangular structures, and star-shaped structures are common two-dimensional concave structures. Their unique concave corner construction is the main reason why concave structures exhibit the negative Poisson's ratio effect. Utility Model Content
[0005] The purpose of this invention is to provide a composite steel plate shear wall with a negative Poisson's ratio structure. This structure combines the good ductility, lightweight and high strength of the steel with the "tensile" and "compression" properties of the negative Poisson's ratio, resulting in superior performance of the entire composite shear wall. This solves the problem of existing steel plate shear walls forming "tension bands" under seismic loads, leading to out-of-plane buckling deformation of the steel plates. Thus, it addresses the problems mentioned in the background art.
[0006] The technical solution adopted in this utility model is as follows:
[0007] A composite steel plate shear wall with a negative Poisson's ratio structure includes two outer steel plates 1, which are arranged parallel to each other. Several C-shaped steels 2 are arranged vertically at equal intervals between the two outer steel plates 1, and foamed concrete is poured in the gap between the two outer steel plates 1. Edge members 5 are provided around the two outer steel plates 1.
[0008] The outer steel plate 1 is provided with a number of linearly arranged concave hexagonal holes on the left and right sides, the concave hexagonal holes being inclined at 45°.
[0009] The edge member 5 includes two H-beams and two rectangular steel pipes. The two H-beams are arranged on the upper and lower sides of the outer steel plate 1, and the two rectangular steel pipes are arranged on the left and right sides of the outer steel plate 1.
[0010] The outer steel plate 1 is welded to the edge member 5 and the C-shaped steel 2.
[0011] The two outer steel plates 1 are connected by tie bolts 3.
[0012] A pad 4 is provided at the connection between the tie bolt 3 and the outer steel plate 1.
[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0014] This invention creates a perforated steel plate with a negative Poisson's ratio effect by setting concave hexagonal perforations on the outer steel plate. This effectively controls the out-of-plane buckling deformation of the outer steel plate without relying on out-of-plane constraints. Combining the good ductility, lightweight and high strength of steel with the "tension" and "compression" characteristics provided by the negative Poisson's ratio structure, this invention results in superior performance of the entire composite shear wall, solving the problem of existing steel plate shear walls forming "tension bands" under seismic loads, leading to out-of-plane buckling deformation of the steel plate.
[0015] This invention features a steel plate with a negative Poisson's ratio effect on its outer side, resulting in greater initial stiffness and load-bearing capacity compared to traditional steel plate shear wall structures, and a larger area of the hysteresis curve. It balances seismic and blast resistance, achieving a coordinated structural performance under both types of disasters. Furthermore, the use of lightweight concrete reduces its self-weight, and the two-sided connection with the frame beams effectively eliminates the adverse effects of tension bands on the frame columns. Attached Figure Description
[0016] Figure 1 This is an exploded view of the present invention;
[0017] Figure 2 This is a schematic diagram of the structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the outer steel plate of this utility model;
[0019] Figure 4 This is a schematic diagram of the outer steel plate and C-shaped steel of this utility model;
[0020] In the diagram: 1. Outer steel plate; 2. C-shaped steel; 3. Tie bolt; 4. Pad; 5. Constraint member. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0024] Example 1
[0025] like Figure 1-4 This embodiment provides a composite steel plate shear wall with a negative Poisson's ratio structure, including two outer steel plates 1, which are arranged parallel to each other. Several C-shaped steels 2 are welded vertically at equal intervals between the two outer steel plates 1, and foamed concrete is poured in the gap between the two outer steel plates 1. Edge members 5 are provided around the two outer steel plates 1.
[0026] The outer steel plate 1 has several linearly arranged concave hexagonal holes with a negative Poisson's ratio effect, featuring a concave structure on both sides. These concave hexagonal holes are inclined at 45°, which provides superior energy dissipation capacity. The concave hexagonal holes with the negative Poisson's ratio effect give the outer steel plate 1 greater initial stiffness and load-bearing capacity, effectively controlling the out-of-plane buckling deformation of the outer steel plate.
[0027] The edge member 5 includes two H-beams and two rectangular steel pipes. The two H-beams are welded to the upper and lower sides of the outer steel plate 1, and the two rectangular steel pipes are welded to the left and right sides of the outer steel plate 1.
[0028] The two outer steel plates 1 are connected by tie bolts 3. The tie bolts are preloaded. A washer 4 is provided at the connection point between the tie bolt 3 and the outer steel plate 1. The washer 4 is pressed against the outer wall of the outer steel plate by the tie bolt 3.
[0029] In this invention, the outer steel plate 1 exhibits a negative Poisson's ratio effect. When the Poisson's ratio v decreases, the shear modulus G increases, thereby enhancing the material's shear capacity. For isotropic materials, the Poisson's ratio v typically fluctuates between -1 and 0.5. Considering the limiting case, when the Poisson's ratio v approaches -1, the shear modulus G tends towards infinity, indicating that the material will undergo almost no shear deformation at this point. Under impact loads, lateral contraction deformation occurs at the locally compressed areas, exhibiting a tendency to densify, and the density increases instantaneously.
Claims
1. A composite steel plate shear wall with a negative Poisson's ratio structure, comprising two outer steel plates (1), characterized in that, Two outer steel plates (1) are arranged parallel to each other, and several C-shaped steels (2) are arranged vertically at equal intervals between the two outer steel plates (1). Foamed concrete is poured in the gap between the two outer steel plates (1), and edge members (5) are arranged around the two outer steel plates (1).
2. The composite steel plate shear wall with a negative Poisson's ratio structure according to claim 1, characterized in that: The outer steel plate (1) is provided with a number of linearly arranged concave hexagonal holes on the left and right sides with an inward concave structure, and the concave hexagonal holes are set at an inclination of 45°.
3. The composite steel plate shear wall with negative Poisson's ratio structure according to claim 1, characterized in that: The edge member (5) includes two H-beams and two rectangular steel pipes. The two H-beams are arranged on the upper and lower sides of the outer steel plate (1), and the two rectangular steel pipes are arranged on the left and right sides of the outer steel plate (1).
4. The composite steel plate shear wall with a negative Poisson's ratio structure according to claim 1, characterized in that: The outer steel plate (1) is welded to the edge member (5) and the C-shaped steel (2).
5. The composite steel plate shear wall with a negative Poisson's ratio structure according to claim 1, characterized in that: The two outer steel plates (1) are connected by tie bolts (3).
6. The composite steel plate shear wall with a negative Poisson's ratio structure according to claim 5, characterized in that: A pad (4) is provided at the connection between the tie bolt (3) and the outer steel plate (1).