CN103276830A - Lead shear damper - Google Patents

Abstract

The invention provides a lead shear damper comprising an upper cover plate (2) and a lower cover plate (3). One end of the upper cover plate (2) is provided with a fixed end plate (9), and the other end of the upper cover plate (2) is provided with an upper return spring (5) fixed on a sliding end plate (7). One end of the lower cover plate (3) is connected to the sliding end plate (7), and the other end of the lower cover plate (3) is connected to a return spring (6) fixed on the fixed end plate (9). The upper cover plate (2) overlaps with the lower cover plate (3). A shear lead block (1) is arranged at the connection of the upper cover plate (2) and the lower cover plate (3). Under rare earthquake action, the return springs can be compressed or elongated to realize shearing deformation of the shear lead block and energy consuming effect of friction of the upper cover plate and the lower cover plate, and return can be realized through initial pre-compression or pretension force of the return springs during and after the earthquake.

Description

A lead shear damper

technical field

The invention relates to a damper, in particular to a damper capable of realizing self-resetting.

Background technique

In recent years, earthquakes have occurred frequently all over the world. People have begun to pay attention to the application of energy dissipation and shock absorption technology while carrying out anti-seismic design of structures. Generally, dampers with energy dissipation capabilities are used in non-load-bearing structural parts. When there are frequent earthquakes, the structure itself has sufficient stiffness and is in the elastic stage; when there are rare earthquakes, as the structural deformation increases, the damper enters the inelastic stage before the main structure, and the damping increases, energy consumption and shock absorption, so as to avoid or Reduce damage to the main structure. Lead has been popularized and used because of its full hysteresis and stable performance, and the damper manufactured by it has a simple structure and convenient processing. At present, various lead dampers have been developed at home and abroad, such as lead shear dampers, lead extrusion dampers, torsional lead shear dampers, etc. As far as the lead shear damper proposed and adopted is concerned, under rare earthquakes, the strong elastic-plastic deformation of the lead shear damper will produce a large residual displacement, which makes it difficult to reset and replace after the earthquake. Therefore, it is necessary to modify the existing lead shear damper and propose a new type of energy-dissipating self-resetting lead shear damper, which can have sufficient energy dissipation capacity under the action of rare earthquakes, and at the same time, has the epicenter And self-resetting function after the earthquake. Based on this, it is necessary to develop a lead shear damper with self-resetting function.

Contents of the invention

In order to make up for the defects of the existing technology, the patent of the present invention provides a lead shear damper with self-resetting function, which can have sufficient energy dissipation capacity under the action of rare earthquakes, and has self-resetting functions at the epicenter and after the earthquake , which can effectively enhance the applicability and safety of the lead shear damper at the epicenter and after the earthquake, and has more practical value.

In order to achieve the above technical purpose, the technical solution of the patent of the present invention is that a lead shear damper includes an upper cover plate and a lower cover plate, one end of the upper cover plate is provided with a fixed end plate, and the other end is provided with an upper return spring, The upper return spring is fixed on the end plate of the sliding end; one end of the lower cover is connected to the end plate of the sliding end, the other end is connected to the lower return spring, the lower return spring is fixed on the end plate of the fixed end, the upper cover is stacked on the lower cover, and the upper The part where the cover plate is connected with the lower cover plate is provided with a shearing lead block.

The lead shear damper with self-resetting function includes shear lead blocks, upper and lower cover plates, restraining cylinders, upper and lower return springs, sliding end end plates, fixed end end plates, restraining cylinder end plates and connecting plates, and the restraining cylinders are wrapped from the outside Hold the upper and lower cover plates (shear cover plates) and shear lead weights, and the two ends of the restraint cylinder are provided with connecting plates. The end plate is provided with a restraining cylinder end plate at the end of the restraining cylinder. The sheared lead weights are fixed in multiple grooves of the upper and lower cover plates. Or the sliding end end plate is connected, and the upper and lower return springs are provided with an initial preload or pretension exceeding the sum of the yield strength of the shear lead block and the friction force of the upper and lower cover plates. Under the action of a rare earthquake, the upper and lower return springs are compressed or elongated. The relative movement of the upper and lower cover plates realizes the shearing deformation of the shear lead block and the energy dissipation effect of the friction of the upper and lower cover plates. The initial preload or pretension of the return spring can be used to reset both at the epicenter and after the earthquake, thus avoiding the epicenter and shock. After the problem of difficult reset and replacement of general lead shear dampers, it also avoids the adverse effects on the structure due to residual displacement. The restraint cylinder reserves a gap between the upper and lower cover plates, the upper and lower return springs and the sliding end plate, thus avoiding the difficulty of resetting and replacing the lead shear damper at the epicenter and after the earthquake, and also avoiding the damage to the structure due to residual displacement. Negative Effects. All parts of the lead shear damper with self-resetting function are welded, manufactured and formed in the factory, and installed with bolts on site. Different lengths of shearing lead blocks provide different energy dissipation and shock absorption capabilities, different return springs and sliding gap lengths provide different strokes, and different return spring stiffnesses determine the stiffness of the damper. Therefore, the self-resetting lead shear damper According to the stress size, deformation requirements and stiffness requirements of the specific structure, a corresponding suitable self-resetting lead shear damper can be produced, which has good practical value and economic benefits.

The size of the sliding gap between the sliding end plate and the restraining cylinder end plate can be adjusted within a certain range according to different requirements. The self-resetting function is realized by the return spring installed between the end plate and the upper and lower cover plates, and the strength of the self-resetting function can be adjusted by adjusting the initial preload or pretension.

The present invention also lies in that the constraining cylinder is wrapped around the upper cover plate, the lower cover plate, the shear lead block and the sliding end plate from the outside, the fixed end end plate is sealed at one end of the constraining cylinder, and the constraining cylinder end plate is sealed at the constrained the other end of the barrel.

The present invention also lies in that a sliding hole is set between the sliding end plate and the constraining cylinder end plate.

The present invention also lies in that the end plate of the fixed end and/or the end plate of the constraint cylinder is provided with a connecting plate.

The invention also lies in that the connecting plate is connected and fixed on the outer surface of the end plate of the fixed end.

The invention also lies in that the connecting plate passes through the end plate of the constraining cylinder and is connected to the end plate of the sliding end.

The invention also lies in that the connecting plate is arranged perpendicular to the connecting seam between the upper cover plate and the lower cover plate.

The invention also lies in that the connection plate is further provided with connection holes.

The present invention also lies in that the shearing lead block is a tooth-shaped structure, and the protruding teeth of the shearing lead block are respectively embedded and fixed in the upper cover plate and the lower cover plate.

The present invention also lies in that the lead shearing block is arranged at the intersection of the connection seam between the upper cover plate and the lower cover plate and the restraint cylinder.

The beneficial effect of the patent of the present invention is that the return spring realizes a good reset ability, avoids the problem of difficult lead shear reset and replacement after the earthquake, and also avoids the adverse effect on the structure due to residual displacement; in addition, the patent of the present invention also has It has the advantages of simple factory production and convenient on-site installation, and has high practical value and economic benefits.

Below in conjunction with accompanying drawing, patent of the present invention is described further.

Description of drawings

Fig. 1 is the schematic diagram of the self-resetting lead shear damper of the embodiment of the present invention;

Fig. 2 is the sectional view of A-A among Fig. 1;

Fig. 3 is the sectional view of B-B in Fig. 1;

Among them, 1 is the shear lead block, 2 is the upper cover plate, 3 is the lower cover plate, 4 is the restraining cylinder, 5 is the upper return spring, 6 is the lower return spring, 7 is the sliding end plate, 8 is the sliding gap, 9 10 is the end plate of the restraining cylinder, 11 is the connecting hole, and 12 is the connecting plate.

Detailed ways

The following is a further description of the technical content of the patent of the present invention, but it is not a limitation to the essential content of the patent of the present invention.

The lead shear damper comprises an upper cover plate 2 and a lower cover plate 3, one end of the upper cover plate 2 is provided with a fixed end plate 9, and the other end is provided with an upper return spring 5, and the upper return spring 5 is fixed on the sliding end end plate 7 One end of the lower cover plate 3 is connected to the sliding end plate 7, the other end is connected to the lower return spring 6, the lower return spring 6 is fixed on the fixed end end plate 9, the upper cover plate 2 is superimposed on the lower cover plate 3, and the upper cover plate 2 The part connected with the lower cover plate 3 is provided with a shearing lead block 1 .

It also lies in that the restraint cylinder 4 is wrapped around the upper cover plate 2, the lower cover plate 3, the shear lead weight 1 and the sliding end plate 7 from the outside, and the fixed end end plate 9 is sealed on one end of the restraint cylinder 4, and the restraint cylinder The end plate 10 covers the other end of the restraint cylinder 4 .

Furthermore, a sliding aperture 8 is provided between the sliding end plate 7 and the constraining cylinder end plate 10 .

Furthermore, a connecting plate 12 is arranged on the end plate 9 of the fixed end and/or the end plate 10 of the constraining cylinder.

It also lies in that the connecting plate 12 is connected and fixed on the outer surface of the end plate 9 at the fixed end.

It also lies in that the connecting plate 12 passes through the end plate 10 of the constraining cylinder and is connected to the end plate 7 of the sliding end.

It is also that the connecting plate 12 is arranged perpendicular to the connecting seam between the upper cover plate 2 and the lower cover plate 3 .

Furthermore, the connecting plate 12 is also provided with a connecting hole 11 .

It also lies in that the shearing lead block 1 is a tooth-shaped structure, and the protruding teeth of the shearing lead block 1 are respectively embedded and fixed in the upper cover plate 2 and the lower cover plate 3 .

It also lies in that the shearing lead weight 1 is arranged at the junction between the connection seam between the upper cover plate 2 and the lower cover plate 3 and the constraint cylinder 4 .

The lead shear damper with self-resetting function includes a shear lead block 1, an upper cover plate 2, a lower cover plate 3, a restraining cylinder 4, an upper return spring 5, a lower return spring 6, a sliding end plate 7, a fixed end end Plate 9, constraint tube end plate 10 and connecting plate 12, constraint tube 4 wraps upper cover plate 2, lower cover plate 3 (shear cover plate) and shear lead block 1 from the outside, and two ends of constraint tube 4 are provided with connection Plate 12, the connecting plate 12 at one end of the constraining cylinder 4 is welded to the fixed end plate 9, and the other end connecting plate 12 is welded to the sliding end plate 7, the sliding end plate 7 is provided with a constraining cylinder end plate 10 at the end of the constraining cylinder 4 , the shearing lead block 1 is fixed in multiple grooves between the upper cover plate 2 and the lower cover plate 3, the appropriate size of the groove can make the shearing lead block 1 deform uniformly, and the force is reasonable, the upper cover plate 2 and the lower cover plate 3 One end of the lower cover plate 3 is connected to the upper return spring 5 and the lower return spring 6 respectively, and one end is connected to the fixed end end plate 9 and the sliding end end plate 7, and the upper return spring 5 and the lower return spring 6 are provided with more than shear lead. The yield strength of block 1 and the initial preload or pretension of the sum of the friction force of the upper and lower cover plates, under the action of rare earthquakes, the return spring is compressed or elongated, and the upper and lower cover plates move relative to each other, so as to realize the shear deformation of lead block 1 and The energy dissipation effect of the friction between the upper and lower cover plates is reset through the initial preload or pretension of the return spring at the epicenter and after the earthquake, thereby avoiding the problem of difficult reset and replacement of the lead shear damper due to the epicenter and after the earthquake. Adverse effects of residual displacements on structures.

The patent of the present invention also lies in that the constraint cylinder 4 reserves a sliding gap 8 between the upper and lower cover plates, the upper and lower return springs and the sliding end plate 7 . The size of the sliding gap 8 between the sliding end plate 7 and the restraining cylinder end plate 10 can be adjusted within a certain range according to different requirements. The self-resetting function is realized by the return spring installed between the end plate and the upper and lower cover plates, and the strength of the self-resetting function can be adjusted by adjusting the initial preload or pretension.

The patented technology of the present invention is suitable for energy dissipation and shock absorption of structures. Fig. 1 is a schematic diagram of a self-resetting lead shear damper according to an embodiment of the present invention. Fig. 2 is a sectional view of A-A in Fig. 1, and Fig. 3 is a sectional view of B-B in Fig. 1 , as shown in Figures 1, 2, and 3, for the structural part, first analyze the force of the structure to determine the force of the damper, so as to select a damper with an appropriate size, so that the initial preload or pretension exceeds the lead block The sum of the yield strength and the friction force of the upper and lower cover plates ensures that the damper can play the role of energy dissipation and shock absorption under the action of earthquake or other loads and can self-reset. For the lead shear energy-consuming part, the shear lead block 1 is fixed in multiple grooves between the upper cover plate 2 and the lower cover plate 3, the length of the groove is about 1/5 of the length of the shear lead block 1, and the shear lead block 1 is The total length of the lead block 1 can be about 3/5 of the length of the constraint tube 4 . One end of the upper cover plate 2 and the lower cover plate 3 is welded with the upper return spring 5 and the lower return spring 6 respectively, and the length of the upper return spring 5 and the lower return spring 6 is about 1/5 of the length of the constraint cylinder 4 . One end is welded with the sliding end plate 7, and the sliding end plate 7 can be made of 10mm Q235 steel plate; one end is welded with the fixed end plate 9, and the sliding end plate 7 and the fixed end plate 9 are welded with a connecting plate 12, which is self-resetting The lead shear damper is connected to the structure through the connection hole 11 (matched with the bolt) on the connection plate 12 and is stressed, so as to ensure that the upper return spring 5 and the lower return spring 6 are in a suitable elastic range, and at the same time ensure that the sliding end plate The sliding gap 8 between 7 and the end plate 10 of the restraining cylinder has enough stroke, generally the length of 10-150mm is desirable. Constraint cylinder 4 is welded by about 10mm steel plate, leaving a gap of 1-2mm between the wrapped upper cover plate 2 and lower cover plate 3, upper return spring 5, lower return spring 6 and sliding end plate 7, as shown in Figure 3 shown. Leave a gap of 1-2 mm between the connecting plate 12 at the sliding end and the restraining cylinder 4 and when passing through the end plate 10 of the restraining cylinder, as shown in FIG. 2 . Under the action of a rare earthquake, the upper return spring 5 and the lower return spring 6 are compressed or stretched, and the upper cover 2 and the lower cover 3 move relative to each other to realize the shearing of the lead block 1 and the upper cover 2 and the lower cover 3 The energy consumption effect of friction. All can be reset by the initial preload or pretension of the upper return spring 5 and the lower return spring 6 both at the epicenter and after the earthquake.

Fig. 1 The manufacturing method of the self-resetting lead shear damper:

1. The upper cover plate 2 and the lower cover plate 3 are respectively connected with the upper return spring 5 and the lower return spring 6 as a whole;

2. The cut lead block is fixed in the groove of A welded by the upper cover plate 2, the lower cover plate 3, the upper return spring 5 and the lower return spring 6, which is B;

3. One end of B is welded to the fixed end plate 9 and the connecting plate 12, and the other end is welded to the sliding end plate 7 and the connecting plate 12;

4. Use 4 pieces of steel plates to weld the restraining cylinder 4 to wrap B, and ensure that there is a gap of 1-2mm between the restraining cylinder 4 and B;

5. Weld the restraint cylinder 4 on the fixed end plate 9;

6. If the sliding end plate 7 is not in the constraining cylinder 4, pre-pressure can be applied to make it enter the constraining cylinder 4, and then the constraining cylinder end plate 10 is welded to ensure that the sliding end connecting plate 12 and the constraining cylinder 4 pass through Leave a gap of 1 to 2 mm when restraining the end plate 10 of the cylinder, and remove the preload after welding.

Claims (10)

1. A lead shear damper, characterized in that it comprises an upper cover plate (2) and a lower cover plate (3), one end of the upper cover plate (2) is provided with a fixed end plate (9), and the other end is provided with a The upper return spring (5), the upper return spring (5) is fixed on the sliding end plate (7); one end of the lower cover plate (3) is connected to the sliding end plate (7), and the other end is connected to the lower return spring (6), The lower return spring (6) is fixed on the fixed end plate (9), the upper cover (2) is superimposed on the lower cover (3), and the connection between the upper cover (2) and the lower cover (3) is set There are cut lead blocks (1). 2. The lead shear damper according to claim 1, characterized in that the restraint cylinder (4) is wrapped around the upper cover plate (2), the lower cover plate (3), and the shear lead block (1) from the outside. And on the sliding end plate (7), the fixed end end plate (9) is capped at one end of the constraint cylinder (4), and the constraint cylinder end plate (10) is capped at the other end of the constraint cylinder (4). 3. The lead shear damper according to claim 2, characterized in that a sliding hole (8) is set between the sliding end plate (7) and the restraining tube end plate (10). 4. The lead shear damper according to claim 3, characterized in that a connecting plate (12) is arranged on the fixed end plate (9) and/or the restraining cylinder end plate (10). 5. The lead shear damper according to claim 4, characterized in that the connecting plate (12) is connected and fixed on the outer surface of the fixed end end plate (9). 6. The lead shear damper according to claim 4, characterized in that the connecting plate (12) passes through the end plate (10) of the restraining cylinder and is connected to the end plate (7) of the sliding end. 7. The lead shear damper according to claim 4, characterized in that the connecting plate (12) is arranged perpendicular to the connecting seam between the upper cover plate (2) and the lower cover plate (3). 8. The lead shear damper according to any one of claims 4 to 7, characterized in that, the connection plate (12) is also provided with a connection hole (11). 9. The lead shear damper according to any one of claims 1 to 7, characterized in that the shear lead block (1) is a toothed structure, and the protruding teeth of the shear lead block (1) are embedded respectively Inside the upper cover (2) and lower cover (3). 10. The lead shear damper according to claim 9, characterized in that, the shear lead block (1) is arranged at the connection seam between the upper cover plate (2) and the lower cover plate (3) and the restraint cylinder ( 4) Intersection.

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