Self-resetting variable friction hinge damper

Abstract

The utility model discloses a self-resetting variable friction hinge damper, and belongs to the field of concrete building structures. The utility model discloses a self-resetting variable friction hinge damper which comprises an outer cover plate, an inner clamping plate, a curved surface friction part and a friction cushion block. The outer cover plate and the inner clamping plate are rotatably connected through the curved surface friction part, and the inner clamping plate is arranged on the inner side of the outer cover plate; the curved surface friction parts are respectively arranged on the surfaces of one ends of the outer cover plate and the inner clamping plate; the curved-surface friction parts on the surfaces of the outer cover plate and the inner clamping plate can be attached to each other; the friction cushion block is embedded between the ends, not provided with the curved surface friction parts, of the inner clamping plates, and the technical problem that friction energy consumption and self-resetting capacity of an existing friction type damper are limited is solved.

Description

Technical Field

[0001] This utility model belongs to the field of concrete building structures and relates to a self-resetting variable friction hinge damper. Background Technology

[0002] Prefabricated buildings, with their significant advantages such as being green and low-carbon, energy-saving and environmentally friendly, having short construction cycles, and reliable engineering quality, have become a mainstream trend in the construction industry. However, with the popularization of prefabricated buildings, the demand for seismic resistance and damping has become increasingly prominent. To address this challenge, researchers have developed various energy-dissipating damping devices. Among them, friction dampers have become a research focus in the field of seismic resistance and damping due to their stable hysteretic performance, strong energy dissipation capacity, ease of use, low maintenance costs, and lack of external energy support. However, the performance parameters of ordinary friction dampers are usually fixed, making it difficult to dynamically adjust them according to actual seismic characteristics or structural requirements. Moreover, ordinary friction dampers cannot achieve self-resetting during energy dissipation, which may lead to significant residual deformation of the structure after an earthquake, affecting the normal use of the building. Utility Model Content

[0003] The purpose of this invention is to provide a self-resetting variable friction hinge damper to solve the technical problems of limited friction energy consumption and self-resetting capability in existing friction dampers.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This application discloses a self-resetting variable friction hinge damper, including an outer cover plate, an inner clamping plate, curved friction components, and friction pads; the outer cover plate and the inner clamping plate are rotatably connected by the curved friction components, and the inner clamping plate is disposed inside the outer cover plate; the curved friction components are respectively disposed on the surface of one end of the outer cover plate and the inner clamping plate; the curved friction components on the surfaces of the outer cover plate and the inner clamping plate can fit together; the friction pads are embedded in the end of the inner clamping plate where no curved friction components are disposed.

[0006] Furthermore, the curved friction component includes a first curved surface and a second curved surface; the first curved surface and the second curved surface are respectively disposed on the surfaces of one end of the outer cover plate and the inner clamping plate, and the first curved surface and the second curved surface are in contact with each other.

[0007] Furthermore, it also includes a pin and an SMA bolt; the surface of the friction pad is provided with a slot; the first curved surface, the second curved surface, and the center of the friction pad are all provided with pin holes; the periphery of the first curved surface, the second curved surface, and one end of the outer cover plate are all provided with SMA bolt holes; the outer cover plate and the inner clamping plate are fitted together through the first curved surface and the second curved surface; the pin passes through the pin hole in the center of the first curved surface, the second curved surface, and the friction pad to connect the outer cover plate, the inner clamping plate, and the friction pad; the SMA bolt passes through the SMA bolt hole and is engaged in the slot.

[0008] Furthermore, the number of slots is several; the several slots are symmetrically arranged on the surface of the friction pad with the pin hole at the center of the friction pad as the symmetrical point.

[0009] Furthermore, a nut is provided on the SMA bolt.

[0010] Furthermore, the SMA bolt consists of a threaded section, a transition section, and a weakening section; the threaded section is located at both ends of the SMA bolt, the weakening section is located in the middle, and the threaded section and the weakening section at both ends are connected by a transition section.

[0011] Furthermore, the other end of the outer cover plate and the inner clamping plate is also provided with a pin hole.

[0012] Furthermore, the pin holes at the other end of the outer cover plate and the inner clamping plate are connected to the building.

[0013] Furthermore, the width between the outer cover plates is greater than the width between the inner clamping plates.

[0014] Furthermore, the outer cover plate and the inner clamping plate are connected at a 90° angle.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This utility model discloses a self-resetting variable friction hinge damper. By setting curved friction components and friction pads between the outer cover plate and the inner clamping plate, it provides friction energy dissipation between curved surfaces and can achieve variable friction energy dissipation. Compared with dampers that only use SMA bolts for energy dissipation or friction energy dissipation, it has higher energy dissipation capacity. Compared with ordinary dampers, it has a self-resetting function, which can reduce the residual deformation of the structure after an earthquake.

[0017] Furthermore, by setting up SMA bolt connections, bolt energy dissipation can be provided. Combined with the frictional energy dissipation between curved surfaces, the overall energy dissipation capacity of this self-resetting variable friction hinge damper is greatly improved.

[0018] Furthermore, the curved friction component is composed of a first curved surface and a second curved surface, which can provide a friction surface during operation and realize variable friction energy dissipation. In addition, the strength, deformation and energy dissipation capacity of the self-resetting variable friction hinge damper can be adjusted by changing key design parameters such as the surface inclination angle, the diameter and length of the SMA bolt weakening section and the number of SMA bolts. It can be dynamically adjusted according to the actual seismic characteristics or structural requirements and has a wide range of applications. Attached Figure Description

[0019] Figure 1 This is an assembly diagram of the self-resetting variable friction hinge damper of this utility model;

[0020] Figure 2 This is a front view of the structure of the self-resetting variable friction hinge damper of this utility model;

[0021] Figure 3 This is a side view of the structure of the self-resetting variable friction hinge damper of this utility model;

[0022] Figure 4 This is a top view of the structure of the self-resetting variable friction hinge damper of this utility model;

[0023] Figure 5 This is a schematic diagram of the outer cover plate of the self-resetting variable friction hinge damper of this utility model;

[0024] Figure 6 This is a schematic diagram of the inner clamping plate of the self-resetting variable friction hinge damper of this utility model;

[0025] Figure 7 This is a schematic diagram of the friction pad block of the self-resetting variable friction hinge damper of this utility model;

[0026] Figure 8 This is a schematic diagram of the SMA bolt of the self-resetting variable friction hinge damper of this utility model;

[0027] Figure 9 This is a schematic diagram of the isometric deformation of the self-resetting variable friction hinge damper of this utility model;

[0028] Figure 10 This is a front view of the self-resetting variable friction hinge damper of this utility model.

[0029] Figure 11 This is a top-view deformed schematic diagram of the self-resetting variable friction hinge damper of this utility model;

[0030] Wherein: 1-outer cover plate; 2-inner clamping plate; 3-pin hole; 4-pin; 5-SMA bolt; 6-nut; 7-friction pad; 8-first curved surface; 9-second curved surface; 10-SMA bolt hole; 11-slot hole; 12-threaded section; 13-transition section; 14-weakening section. Detailed Implementation

[0031] 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.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] This utility model discloses a self-resetting variable friction hinge damper, including an outer cover plate 1, an inner clamping plate 2, a curved friction component, and a friction pad 7. The curved friction component consists of a first curved surface 8 on the outer cover plate 1 and a second curved surface 9 on the inner clamping plate 2. The self-resetting variable friction hinge damper also includes a pin hole 3, a pin 4, several SMA bolts 5, several nuts 6, SMA bolt holes 10, and slots 11. The outer cover plate 1 and the inner clamping plate 2 are positioned at 90° to each other, and are connected by the first curved surface 8 and the second curved surface 9. The plates are fitted together and rotate around the pin 4; the friction pad 7 is disposed between the two clamping plates; the pin hole 3 is disposed at the center of the first curved surface 8, the second curved surface 9 and the friction pad 7; the SMA bolt hole 10 is disposed around the first curved surface 8, the second curved surface 9 and one end of the outer cover plate 1; the pin 4 passes through the pin hole 3 at the center of the first curved surface 8, the second curved surface 9 and the friction pad 7 to connect the outer cover plate 1, the inner clamping plate 2 and the friction pad 7; the SMA bolt 5 passes through the SMA bolt hole 10 and is locked in the slot 11; the nut 6 is disposed on the SMA bolt 5.

[0034] Preferably, the SMA bolt 5 is machined from SMA bar stock. The SMA bolt 5 has a threaded section 12, a transition section 13 and a weakening section 14 machined on it, the purpose of which is to achieve threaded connection, avoid stress concentration and make deformation uniform, respectively.

[0035] Preferably, the other end of the outer cover plate 1 and the inner clamping plate 2 is also provided with a pin hole 3 for connecting to the building.

[0036] When the self-resetting variable friction hinge damper of this invention is subjected to a tensile load, one end of the outer cover plate 1 and the inner clamping plate 2 connected to the building moves horizontally outward, while the other end rotates around the pin 4. Since the first curved surface 8 of the outer cover plate 1 and the second curved surface 9 of the inner clamping plate 2 are in contact, their mutual misalignment will cause the outer cover plates 1 on both sides to move outward, increasing the distance between them. This, in turn, causes the SMA bolt 5 to be stretched. Figure 9-11 As shown; the slot 11 on the inner clamping plate 2 prevents the weakened section 14 of the SMA bolt 5 from being sheared. The axial force of the SMA bolt 5 causes a normal force between the first curved surface 8 and the second curved surface 9, which in turn generates friction. The magnitude of the friction changes with the axial force of the SMA bolt 5.

[0037] The energy dissipation capacity of the self-resetting variable friction hinge damper consists of the frictional energy dissipation between the first curved surface 8 and the second curved surface 9 and the energy dissipation of the SMA bolt 5; changing the key parameters can adjust the strength, deformation and energy dissipation capacity of the damper.

[0038] Furthermore, the key parameters include the surface inclination angle, the diameter and length of the weakened section 14 of the SMA bolt 5, and the number of SMA bolts 5; when the tensile load disappears, the restoring force of the SMA bolts 5 will cause the outer cover plate 1 and the inner clamping plate 2 to return to their initial positions, achieving a self-resetting effect.

[0039] When the self-resetting variable friction hinge damper of this invention is under compression, its energy dissipation principle is the same as when it is under tension:

[0040] First, connect one end of the outer cover plate 1 and the inner clamping plate 2 to the building through the pin hole 3. Then, connect the other end of the outer cover plate 1 and the inner clamping plate 2, as well as the friction pad 7, through the pin 4, so that the first curved surface 8 on the outer cover plate 1 and the second curved surface 9 on the inner clamping plate 2 are fully fitted. Pass the SMA bolt 5 through the SMA bolt hole 10 of the outer cover plate 1 and the slot hole 11 of the inner clamping plate 2. Then, fix both ends of the SMA bolt 5 with the high-strength nut 6 and apply the preload to the design value.

[0041] The present invention will now be described in further detail with reference to the accompanying drawings:

[0042] See Figure 1-11As shown, the self-resetting variable friction hinge damper disclosed in this utility model has an outer cover plate 1, an inner clamping plate 2, a friction pad 7, and a pin hole 3 respectively spaced at both ends of the outer cover plate 1 and the inner clamping plate 2 and at the center of the friction pad 7. A pin 4 passes through the pin hole 3 to connect the outer cover plate 1, the inner clamping plate 2, and the friction pad 7. An SMA bolt 5 passes through the SMA bolt hole 10 on the outer cover plate 1 and the slot 11 on the inner clamping plate 2. One end of the outer cover plate 1 and the inner clamping plate 2 are connected to the building through the pin hole 3, and the other end is located on the first curved surface 8 on the outer cover plate 1 and the second curved surface 9 on the inner clamping plate 2, which are in contact with each other and rotate around the pin 4.

[0043] In use, firstly, connect one end of the outer cover plate 1 and the inner clamping plate 2 to the building through the pin hole 3. Then, connect the other end of the outer cover plate 1 and the inner clamping plate 2, as well as the friction pad 7, through the pin 4, so that the first curved surface 8 on the outer cover plate 1 and the second curved surface 9 on the inner clamping plate 2 are fully fitted. Pass the SMA bolt 5 through the SMA bolt hole 10 of the outer cover plate 1 and the slot hole 11 of the inner clamping plate 2. Then, fix both ends of the SMA bolt 5 with the nut 6 and apply the preload to the design value.

[0044] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A self-resetting variable friction hinge damper, characterized in that, It includes an outer cover plate (1), an inner clamping plate (2), curved friction components, and friction pads (7); the outer cover plate (1) and the inner clamping plate (2) are rotatably connected by the curved friction components, and the inner clamping plate (2) is located inside the outer cover plate (1); the curved friction components are respectively located on the surface of one end of the outer cover plate (1) and the inner clamping plate (2); the curved friction components on the surfaces of the outer cover plate (1) and the inner clamping plate (2) can fit together; the friction pads (7) are embedded in the end of the inner clamping plate (2) where no curved friction components are provided.

2. The self-resetting variable friction hinge damper according to claim 1, characterized in that, The curved friction component includes a first curved surface (8) and a second curved surface (9); the first curved surface (8) and the second curved surface (9) are respectively disposed on the surface of one end of the outer cover plate (1) and the inner clamping plate (2), and the first curved surface (8) and the second curved surface (9) are in contact with each other.

3. The self-resetting variable friction hinge damper according to claim 2, characterized in that, It also includes a pin (4) and an SMA bolt (5); the surface of the friction pad (7) is provided with a slot (11); the center of the first curved surface (8), the second curved surface (9) and the friction pad (7) are all provided with pin holes (3); the periphery of the first curved surface (8) and the second curved surface (9) and one end of the outer cover plate (1) are all provided with SMA bolt holes (10); the outer cover plate (1) and the inner clamping plate (2) are fitted together by the first curved surface (8) and the second curved surface (9); the pin (4) passes through the pin hole (3) in the center of the first curved surface (8), the second curved surface (9) and the friction pad (7) to connect the outer cover plate (1), the inner clamping plate (2) and the friction pad (7); the SMA bolt (5) passes through the SMA bolt hole (10) and is stuck in the slot (11).

4. A self-resetting variable friction hinge damper according to claim 3, characterized in that, The number of slots (11) is several; the several slots (11) are symmetrically arranged on the surface of the friction pad (7) with the pin hole (3) at the center of the friction pad (7) as the symmetrical point.

5. A self-resetting variable friction hinge damper according to claim 3, characterized in that, A nut (6) is provided on the SMA bolt (5).

6. A self-resetting variable friction hinge damper according to claim 3, characterized in that, The SMA bolt (5) consists of a threaded section (12), a transition section (13) and a weakening section (14); the threaded section (12) is located at both ends of the SMA bolt (5), the weakening section (14) is located in the middle, and the threaded section (12) and the weakening section (14) at both ends are connected by the transition section (13).

7. A self-resetting variable friction hinge damper according to claim 1, characterized in that, The other end of the outer cover plate (1) and the inner clamping plate (2) is also provided with a pin hole (3).

8. A self-resetting variable friction hinge damper according to claim 7, characterized in that, The pin hole (3) at the other end of the outer cover plate (1) and inner clamping plate (2) is connected to the building.

9. A self-resetting variable friction hinge damper according to claim 1, characterized in that, The width between the outer cover plates (1) is greater than the width between the inner clamping plates (2).

10. A self-resetting variable friction hinge damper according to claim 1, characterized in that, The outer cover plate (1) and the inner clamping plate (2) are connected at 90° to each other.

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