Two-stage protection seismic mitigation and isolation support

Abstract

The utility model relates to the technical field of bridge components, in particular to a two-stage protection seismic mitigation and isolation support which comprises a second support plate, and a first support plate is arranged over the top end of the second support plate. The second support plate, the first support plate, the elastic body, the check block and the elastic piece are used in cooperation, in the vertical damping process, firstly, vibration force is transmitted to the first support plate through the beam body on the upper portion, then the vibration force is transmitted to the sliding plate, the steel lining plate, the elastic body, the second support plate and the bridge pier in sequence, and the purpose of vertical damping is achieved through the elastic body; when the actual horizontal force is larger than the designed horizontal force value, the anti-shearing pin and the bolt of the fixed check block are sheared off from the first fracture groove and the second fracture groove, after displacement is generated, the outer side of the top end of the steel lining plate makes contact with the elastic piece, the buffering effect is achieved, the secondary protection function is achieved, and therefore beam falling is prevented, a bridge and an abutment are protected, and the service life of the bridge is prolonged. Therefore, the shock absorption and isolation function is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge components, in particular to a double-stage protection and seismic isolation bearing. Background Art

[0002] At present, most bearings use hard-resistance structures to withstand horizontal forces. When additional horizontal forces or earthquake horizontal forces exceed the design horizontal forces of the bearings, the bearing blocks may be damaged and the bearing anchor bolts may be sheared, thus causing damage to the entire bearing.

[0003] When the support is damaged, it is usually necessary to lift the beam to carry out maintenance and replacement, which causes difficulties in construction, creates safety hazards in operations, and increases the corresponding economic costs.

[0004] In order to overcome the above shortcomings, a double-stage protection seismic isolation bearing is designed to meet the above requirements. Utility Model Content

[0005] The purpose of the utility model is to provide a double-stage protection and seismic isolation bearing to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A double-stage protection and seismic isolation bearing, comprising

[0008] Support plate 2, support plate 1 is arranged just above the top of the support plate 2, and a shock absorbing mechanism is arranged between the support plate 2 and the support plate 1;

[0009] The stopper is arranged on both sides below the support plate 1, and a connecting mechanism is arranged between the stopper and the support plate 1.

[0010] Preferably, the shock absorbing mechanism comprises an elastic body, the elastic body is arranged on the inner side of the second support plate, the upper end of the elastic body is provided with a steel lining plate, and the steel lining plate is arranged below the first support plate;

[0011] Preferably, a slide plate is further provided between the middle lower end surface of the support plate 1 and the middle upper end surface of the steel liner;

[0012] Preferably, the connection mechanism includes a shear pin and a bolt, the stopper is fixedly connected to the left side of the support plate 1 via the shear pin, and the stopper is fixedly connected to the right side of the support plate 1 via the bolt;

[0013] Preferably, the connection mechanism further comprises a first fracture groove and a second fracture groove, wherein the first fracture groove is arranged outside the middle of the shear pin, and the second fracture groove is arranged outside the middle of the bolt, and the shear pin is provided with a first twisting groove at both upper and lower ends of the first fracture groove, and the bolt is provided with a second twisting groove at both upper and lower ends of the second fracture groove;

[0014] Preferably, an elastic member is provided in an annular shape on the inner wall of the support plate 1.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. This double-stage protection and seismic isolation bearing is used in combination with bearing plate two, bearing plate one, elastomer, stopper and elastic member. During vertical shock absorption, the vibration force is first transmitted to bearing plate one by the upper beam, and then transmitted to the slide plate, steel lining plate, elastomer, bearing plate two and bridge pier in sequence, and the purpose of vertical shock absorption is achieved through the elastomer. During lateral shock absorption, when the actual horizontal force is greater than the designed horizontal force value, the shear pins and bolts of the fixed stopper are sheared off from the set fracture groove one and fracture groove two. After displacement occurs, the outer side of the top end of the steel lining plate contacts the elastic member, which plays a buffering role and has a secondary protection function, thereby preventing the beam from falling, protecting the bridge and piers, and realizing the seismic isolation function.

[0017] 2. This double-stage protection seismic isolation bearing is used in conjunction with a block, shear pins and bolts. When the actual horizontal force is greater than the designed horizontal force value, the shear pins and bolts of the fixed block are cut off from the set fracture grooves 1 and 2, and then the shear pins and bolts of the fixed block are taken out of the holes through the folding grooves 1 and 2 using tools. After the beam body is reset, the block is reinstalled through the shear pins and bolts, thereby achieving the purpose of easy and quick replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall main structure of the utility model;

[0019] Figure 2 This is a schematic cross-sectional structural diagram of the elastic member of the utility model;

[0020] Figure 3 This is a schematic diagram of the side view structure of the shear pin of the utility model;

[0021] Figure 4 This is a schematic diagram of the top view structure of the shear pin of the utility model;

[0022] Figure 5 This is a schematic diagram of the bolt side structure of the utility model;

[0023] Figure 6 It is a schematic diagram of the bolt structure from top view of the present invention.

[0024] In the figure: 1. Support plate 2; 2. Support plate 1; 3. Stop block; 4. Elastic body; 5. Steel lining plate; 6. Slide plate; 7. Shear pin; 8. Bolt; 9. Fracture groove 1; 10. Fracture groove 2; 11. Twist-fold groove 1; 12. Twist-fold groove 2; 13. Elastic member. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-2 As shown, a technical solution provided by the utility model:

[0027] A double-stage protection and seismic isolation bearing, comprising a bearing plate 2 1, a bearing plate 1 2 is arranged just above the top of the bearing plate 2 1, a shock absorbing mechanism is arranged between the bearing plate 2 1 and the bearing plate 1 2, the shock absorbing mechanism comprises an elastic body 4, the elastic body 4 is arranged on the inner side of the bearing plate 2 1, a steel lining plate 5 is arranged on the upper end of the elastic body 4, the steel lining plate 5 is arranged below the bearing plate 1 2, a sliding plate 6 is further arranged between the middle lower end surface of the bearing plate 1 2 and the middle upper end surface of the steel lining plate 5, and an elastic member 13 is arranged in an annular shape at the inner wall of the bearing plate 1 2;

[0028] In this embodiment, when it is necessary to rotate the support plate 2, the steel lining plate 5 and the elastic body 4 are used to achieve the purpose of rotation. During vertical shock absorption, the vibration force is first transmitted to the support plate 2 by the upper beam body, and then transmitted to the slide plate 6, the steel lining plate 5, the elastic body 4, the support plate 21 and the bridge pier in turn, and the purpose of vertical shock absorption is achieved through the elastic body 4. During lateral shock absorption, when the actual horizontal force is greater than the designed horizontal force value, the shear pin 7 and the bolt 8 of the fixed stop block 3 are sheared off from the set fracture groove 19 and the fracture groove 2 10. After the displacement occurs, the outer side of the top end of the steel lining plate 5 contacts the elastic member 13, which plays a buffering role and has a secondary protection function, thereby preventing the beam from falling, protecting the bridge and the pier, so as to achieve the shock absorption and isolation function.

[0029] like Figure 3-6As shown, the stopper 3 is arranged on both sides below the support plate 2, a connecting mechanism is arranged between the stopper 3 and the support plate 2, the connecting mechanism includes a shear pin 7 and a bolt 8, the stopper 3 is fixedly connected to the left side of the support plate 2 by the shear pin 7, the stopper 3 is fixedly connected to the right side of the support plate 2 by the bolt 8, the connecting mechanism also includes a fracture groove 19 and a fracture groove 210, the fracture groove 19 is arranged on the outside of the middle of the shear pin 7, the fracture groove 210 is arranged on the outside of the middle of the bolt 8, the shear pin 7 is located at the upper and lower ends of the fracture groove 19 and the twisting groove 11 is arranged, and the bolt 8 is located at the upper and lower ends of the fracture groove 210 and the twisting groove 212 is arranged;

[0030] In this embodiment, when the actual horizontal force is greater than the designed horizontal force value, the shear pin 7 and the bolt 8 of the fixed stopper 3 are cut off from the provided breaking groove 1 9 and the breaking groove 2 10, and then the shear pin 7 and the bolt 8 of the fixed stopper 3 are taken out from the hole through the folding groove 1 11 and the folding groove 2 12 using a tool. After the beam body is reset, the stopper 3 is reinstalled through the shear pin 7 and the bolt 8, thereby achieving the purpose of facilitating quick replacement.

[0031] Working principle: When the support plate 1-2 needs to be rotated, the steel lining plate 5 and the elastic body 4 are used to realize the purpose of rotation. When vertical shock absorption is performed, the vibration force is first transmitted to the support plate 1-2 by the upper beam, and then transmitted to the slide plate 6, the steel lining plate 5, the elastic body 4, the support plate 2-1 and the bridge pier in sequence, and the purpose of vertical shock absorption is achieved through the elastic body 4. When horizontal shock absorption is performed, when the actual horizontal force is greater than the designed horizontal force value, the shear pin 7 and the bolt 8 of the fixed stopper 3 are sheared off from the set fracture groove 1-9 and fracture groove 2-10. After the displacement occurs, the top outer side of the steel lining plate 5 is connected to the bridge pier. The elastic member 13 contacts and acts as a buffer, and has a secondary protection function, thereby preventing the beam from falling, protecting the bridge and piers, and realizing the seismic isolation function; when the actual horizontal force is greater than the designed horizontal force value, the shear pin 7 and the bolt 8 of the fixed stopper 3 are cut off from the set fracture groove 1 9 and the fracture groove 2 10, and then the shear pin 7 and the bolt 8 of the fixed stopper 3 are taken out from the hole through the folding groove 1 11 and the folding groove 2 12 using a tool. After the beam body is reset, the stopper 3 is reinstalled through the shear pin 7 and the bolt 8, thereby achieving the purpose of easy and quick replacement.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A double-stage protection seismic isolation bearing, characterized in that: include Support plate 2 (1), support plate 1 (2) is arranged directly above the top of the support plate 2 (1), and a shock absorbing mechanism is arranged between the support plate 2 (1) and the support plate 1 (2); A stopper (3) is arranged on both sides below the support plate (2), and a connecting mechanism is arranged between the stopper (3) and the support plate (2).

2. The double-stage protection and seismic isolation bearing according to claim 1 is characterized in that: The shock absorbing mechanism comprises an elastic body (4), the elastic body (4) is arranged on the inner side of the second support plate (1), a steel lining plate (5) is arranged on the upper end of the elastic body (4), and the steel lining plate (5) is arranged below the first support plate (2).

3. The double-stage protection and seismic isolation bearing according to claim 2 is characterized in that: A slide plate (6) is further provided between the middle lower end surface of the support plate 1 (2) and the middle upper end surface of the steel lining plate (5).

4. The double-stage protection and seismic isolation bearing according to claim 1 is characterized in that: The connection mechanism comprises a shear pin (7) and a bolt (8); the stopper (3) is fixedly connected to the left side of the support plate (2) via the shear pin (7); and the stopper (3) is fixedly connected to the right side of the support plate (2) via the bolt (8).

5. The double-stage protection and seismic isolation bearing according to claim 4 is characterized in that: The connecting mechanism further comprises a first fracture groove (9) and a second fracture groove (10), wherein the first fracture groove (9) is arranged on the outer side of the middle part of the shear pin (7), and the second fracture groove (10) is arranged on the outer side of the middle part of the bolt (8), and the shear pin (7) is provided with a first twisting groove (11) at both upper and lower ends of the first fracture groove (9), and the bolt (8) is provided with a second twisting groove (12) at both upper and lower ends of the second fracture groove (10).

6. The double-stage protection and seismic isolation bearing according to claim 1 is characterized in that: An elastic member (13) is provided in an annular manner on the inner wall of the support plate 1 (2).

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