Friction combined type annular metal damper

Abstract

The utility model relates to a friction combined type annular metal damper, and belongs to the technical field of building energy dissipation and shock absorption. Comprising U-shaped plates, an upper connector, a lower connector, a friction damping device and high-strength bolts, a middle framework of the friction combined type annular metal damper is a set of symmetrical U-shaped plates, the upper connector is welded to the upper portion of an upper straight section, the lower connector is welded to the lower portion of a lower straight section, and the friction damping device is arranged between the upper straight section and the lower straight section. The annular damper has the advantages that the damping force of the annular damper is provided by the U-shaped plate and the friction damping device together, the friction force of the friction damping device can be changed by adjusting the pretightening force of the high-strength bolt, the friction damping device has the out-of-plane limiting function, and the friction damping device is convenient to use. The out-of-plane deformation of the friction composite annular metal damper can be effectively reduced, and torsional deformation of the damper when an earthquake occurs is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of building energy dissipation and shock absorption, in particular to a friction composite annular metal damper. Background Art

[0002] The annular metal damper is a bending yield type damper. Under working conditions, the straight section and the arc section will bend and deform until the steel plate yields when subjected to force. As the deformation increases, the geometric shape of the straight section and the arc section will change, and the internal force will be redistributed accordingly, which can achieve multi-section yield, so it has excellent low-cycle fatigue performance. However, the steel used as its raw material has randomness in material mechanical properties. Even if the steel is of the same grade, the actual yield strength will be higher than the lower limit of the corresponding grade given in the specification when the source manufacturer and production batch are different, but the degree of excess varies. This results in the damping force actually output by the annular metal damper designed according to theoretical parameters will change more or less, which will have an adverse effect on the structural energy dissipation and shock absorption system.

[0003] The direction of earthquake force is random. When an actual earthquake occurs, the building often produces bidirectional deformation, which causes the damper in the building to be subjected to forces both inside and outside the plane. Annular metal dampers are prone to torsional deformation when subjected to out-of-plane forces, which greatly affects the normal operation of the damper. Therefore, additional measures are generally required to limit the out-of-plane deformation of the damper. Utility Model Content

[0004] The present application provides a friction composite annular metal damper, which is composed of two symmetrically arranged U-shaped plates, upper and lower connecting heads and a friction damping device, to solve the problems of conventional annular metal dampers such as the inability to adjust the damping force and weak out-of-plane stiffness. The technical solution adopted by the utility model is as follows:

[0005] A friction composite annular metal damper comprises a U-shaped plate, an upper connecting head, a lower connecting head, a friction damping device, and a high-strength bolt;

[0006] A middle skeleton of a friction composite annular metal damper is a group of symmetrical U-shaped plates, wherein the U-shaped plates are composed of an upper straight section, an arc section, and a lower straight section. An upper connecting head is welded to the top of the two symmetrical upper straight sections, and a lower connecting head is welded to the bottom of the two symmetrical lower straight sections. A friction damping device is arranged between the upper straight section and the lower straight section. The friction damping device is composed of an outer clamping plate and a middle slide plate. The outer clamping plate is welded to the top of the lower straight section, and the middle slide plate is welded to the bottom of the upper straight section. Friction material is arranged on the inner surface of the outer clamping plate, and a long slot hole is opened on the middle slide plate. High-strength bolts are used to pass through the long slot hole to fix the outer clamping plate and the middle slide plate.

[0007] Furthermore, the upper connecting head and the lower connecting head are H-shaped steel or channel steel.

[0008] Furthermore, the outer clamping plate and the middle slide plate are both steel plates, and the surface of the middle slide plate is a frosted surface.

[0009] Furthermore, the outer clamping plates and the middle slide plates are stacked, and the number of the outer clamping plates is one more than the number of the middle slide plates.

[0010] Furthermore, the friction force provided by the friction damping device can be adjusted by the pre-tightening force of the high-strength bolts.

[0011] Beneficial effects of the utility model:

[0012] The beneficial effects and advantages of the utility model are that the damping force of the annular damper is provided by the U-shaped plate and the friction damping device. By adjusting the preload of the high-strength bolts, the friction force of the friction damping device can be changed. Therefore, when the actual damping force of the damper does not conform to the design parameters due to differences in raw materials, the damping force can be calibrated by adjusting the output of the friction damping device. The friction damping device has an out-of-plane limit function, which can effectively reduce the out-of-plane deformation of the friction composite annular metal damper and avoid torsional deformation of the damper when an earthquake occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram of the three-dimensional structure of a friction composite annular metal damper.

[0014] Figure 2 It is a schematic diagram of the front view of a friction composite annular metal damper of the utility model.

[0015] Figure 3 It is a schematic top view of a friction composite annular metal damper of the utility model.

[0016] In the figure, 1 is a U-shaped plate; 2 is an upper connecting head; 3 is a lower connecting head; 4 is a friction damping device; 5 is a high-strength bolt; 1-1 is an upper straight section; 1-2 is an arc section; 1-3 is a lower straight section; 4-1 is an outer clamping plate; 4-2 is a middle sliding plate; 4-3 is a friction material; and 4-2-1 is a long slot hole. DETAILED DESCRIPTION

[0017] In order to further illustrate the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be construed as limiting the protection scope of the present invention. Example

[0018] like Figure 1-Figure 3As shown, the utility model is a friction composite annular metal damper, comprising a U-shaped plate 1, an upper connecting head 2, a lower connecting head 3, a friction damping device 4, and a high-strength bolt 5.

[0019] The middle frame of a friction composite annular metal damper is a group of symmetrical U-shaped plates 1, the U-shaped plate 1 is composed of an upper straight section 1-1, an arc section 1-2, and a lower straight section 1-3, an upper connector 2 is welded above the upper straight section 1-1, and a lower connector 3 is welded below the lower straight section 1-3, the upper connector 2 and the lower connector 3 are H-shaped steel or channel steel, a friction damping device 4 is arranged between the upper straight section 1-1 and the lower straight section 1-3, and the friction damping device 4 is composed of an outer clamping plate 4-1 and a middle slide plate 4 -2, the outer clamping plate 4-1 is welded and connected above the lower straight section 1-3, the middle slide plate 4-2 is welded and connected below the upper straight section 1-1, the inner surface of the outer clamping plate 4-1 is provided with friction material 4-3, the surface of the middle slide plate 4-2 is a frosted surface, a long slot hole 4-2-1 is provided on the middle slide plate 4-2, and the outer clamping plate 4-1 and the middle slide plate 4-2 are fixed by high-strength bolts 5 passing through the long slot hole 4-2-1, and the friction force provided by the friction damping device 4 can be adjusted by the pre-tightening force of the high-strength bolts 5.

[0020] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A friction composite annular metal damper, characterized in that: It comprises a U-shaped plate (1), an upper connecting head (2), a lower connecting head (3), a friction damping device (4), and a high-strength bolt (5); A friction composite annular metal damper has a middle frame which is a group of symmetrical U-shaped plates (1). The U-shaped plates (1) are composed of an upper straight section (1-1), an arc section (1-2), and a lower straight section (1-3). The two symmetrical upper straight sections (1-1) are welded to an upper connector (2) at the top, and the two symmetrical lower straight sections (1-3) are welded to a lower connector (3) at the bottom. A friction damping device (4) is arranged between the upper straight section (1-1) and the lower straight section (1-3). The friction damping device (4) is composed of an outer clamping plate (4-1) and a middle slide plate (4-2); the outer clamping plate (4-1) is welded to the top of the lower straight section (1-3); the middle slide plate (4-2) is welded to the bottom of the upper straight section (1-1); a friction material (4-3) is arranged on the inner surface of the outer clamping plate (4-1); a long slot hole (4-2-1) is provided on the middle slide plate (4-2); and a high-strength bolt (5) is passed through the long slot hole (4-2-1) to fix the outer clamping plate (4-1) and the middle slide plate (4-2).

2. A friction composite annular metal damper according to claim 1, characterized in that: The upper connecting head (2) and the lower connecting head (3) are H-shaped steel or channel steel.

3. The friction composite annular metal damper according to claim 1, characterized in that: The outer clamping plate (4-1) and the middle slide plate (4-2) are both steel plates, and the surface of the middle slide plate (4-2) is a frosted surface.

4. The friction composite annular metal damper according to claim 1, characterized in that: The outer clamping plate (4-1) and the middle sliding plate (4-2) are stacked, and the number of the outer clamping plates (4-1) is one more than the number of the middle sliding plates (4-2).

5. The friction composite annular metal damper according to claim 1, characterized in that: The friction force provided by the friction damping device (4) can be adjusted by the pre-tightening force of the high-strength bolt (5).

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