CN202989766U - Lead core high-damping rubber seismic mitigation and absorption support seat - Google Patents

Abstract

The utility model relates to a lead-core high-damping rubber shock-absorbing and isolation support. By wrapping a restraint spring or carbon fiber fabric on the outer wall of the lead core, a high-damping rubber layer and a stiffened steel plate are stacked on the periphery of the lead core. The damping ratio It can reach more than 30%, and only needs a small horizontal shear deformation to exert its damping and energy consumption effect. The deformation of the bearing itself is small during an earthquake, and the demand for expansion joints at the bridge end is also small, which can reduce expansion and contraction. The cost of joints reduces the displacement of the bridge, and the spring and high damping rubber layer jointly assist the deformation recovery of the lead core, which speeds up the recovery time of the deformation of the support, and the residual deformation after the earthquake is small, so there is no need to use jacks to push and other methods to assist the support. The seat and the bridge it supports are reset.

Description

Lead core high damping rubber shock absorber

technical field

The utility model belongs to the technical field of vibration reduction and isolation of bridges, in particular to a lead core high damping rubber vibration reduction support. the

Background technique

At present, domestic bridge shock-absorbing and isolation bearings mainly include lead rubber bearings and high damping rubber bearings. These two types of shock-absorbing and isolating bearings mainly increase the energy dissipation performance and reduce the seismic force of the bridge structure itself by increasing the damping ratio. the

The lead core rubber bearing increases the damping ratio of the bearing by adding high-purity lead cores to the ordinary plate rubber bearing, and the high damping rubber bearing uses the high damping rubber material with a high damping ratio instead of ordinary rubber to improve the damping ratio of the bearing. damping ratio. the

The damping ratio of lead rubber bearings and high-damping rubber bearings is only about 15%, and large horizontal shear deformation is required to exert their damping and energy dissipation effects. During earthquakes, the deformation of the bearing itself is large, and the bridge structure is When installing the above two types of supports, it is necessary to increase the amount of expansion of the expansion joints at the beam end to accommodate its large horizontal shear deformation. the

During an earthquake, after the lead rubber bearing yields, the metal lead can be recrystallized at room temperature to restore deformation. However, due to the small elastic modulus of the rubber material wrapped around the lead core, the restraint effect is low, and the recovery deformation time of the lead rubber bearing Slower, resulting in large residual deformation after the earthquake, it is necessary to use jacks to push and other methods to assist the support and the bridge supported by it to reset. the

Utility model content

In order to overcome the shortcomings of the lead rubber bearing in the prior art, the utility model provides a bearing that can significantly increase the damping ratio of the bearing and reduce the deformation of the bearing and its supporting bridge during an earthquake, and can be used after the earthquake. Fast self-resetting lead core high damping rubber shock-absorbing support. the

The technical solution to solve the technical problem is: on the inner side of the upper connecting plate, an upper sealing plate is attached to the upper connecting plate, a lower connecting plate symmetrical to the upper connecting plate is arranged under the lower sealing plate, and a lower connecting plate is arranged on the inner side of the lower connecting plate. Sealing plate, a lead core hole is processed in the center of the upper sealing plate and the lower sealing plate, and a lead core high damping rubber component is set between the upper sealing plate and the lower sealing plate;

The above-mentioned lead core high damping rubber component is that the two ends of the lead core respectively extend into the lead core holes of the upper sealing plate and the lower sealing plate. The stiffened steel plate is vulcanized with a high damping rubber layer around the stiffened steel plate. the

The above-mentioned constraint layer is a constraint spring or carbon fiber fabric. the

The above-mentioned stiffening steel plate has at least two layers. the

The edges of the high damping rubber layer at the upper and lower ends extend to the periphery of the upper sealing plate and the lower sealing plate, and are respectively aligned with the upper sealing plate and the lower sealing plate. the

The upper sealing plate and the lower sealing plate are respectively connected with the upper connecting plate and the lower connecting plate through threaded fasteners. the

The damping ratio of the above-mentioned high damping rubber layer is ≥10% and ≤18%. the

The lead core high-damping rubber shock-absorbing and isolation support of the utility model is wrapped with a restraint spring or carbon fiber fabric on the outer wall of the lead core, and a high-damping rubber layer and a stiffening steel plate are stacked on the periphery of the lead core, so that the damping ratio can reach More than 30%, and it only needs a small horizontal shear deformation to exert its damping energy consumption effect. The deformation of the bearing itself is small during the earthquake, and the demand for expansion joints at the bridge end is also small, which can reduce the expansion joints. The construction cost is low, the displacement of the bridge is reduced, and the spring and the high damping rubber layer jointly assist the deformation recovery of the lead core, which speeds up the recovery time of the support deformation, and the residual deformation after the earthquake is small, so there is no need to use jacks to push the support and other methods to assist the support and the bridge it supports resets. the

Description of drawings

Fig. 1 is the structural representation of embodiment 1. the

Detailed ways

The technical solution of the utility model will be further described in conjunction with the accompanying drawings and embodiments, but the utility model is not limited to the following implementation manners. the

Example 1

Referring to Fig. 1, the lead-core high-damping rubber shock-absorbing support of the present embodiment is composed of an upper connecting plate 1, an upper sealing plate 2, a restraint spring 3, a lead core 4, an internal thread fastener 5, an anchor bolt 6, a high-damping The rubber layer 7, the stiffened steel plate 8, the lower sealing plate 9 and the lower connecting plate 10 are connected to form. the

The upper connecting plate 1 is square, and four installation holes are processed on the four corners of the upper connecting plate 1, and the lower connecting plate 10 is arranged symmetrically below the upper connecting plate 1, along which the upper connecting plate 1 and the lower connecting plate 10 An upper sealing plate 2 and a lower sealing plate 9 are arranged on the inner side of the inner side respectively, the upper connecting plate 1 and the upper sealing plate 2 are fastened by internal thread fasteners, and the lower connecting plate 10 and the lower sealing plate 9 are tightened by internal threads. The firmware is fastened, and lead core holes are respectively processed at the center of the upper sealing plate 2 and the lower sealing plate 9, and a lead core 4, a constraining layer, a stiffening steel plate 8 and The lead core high damping rubber assembly composed of high damping rubber layer 7, the two ends of the lead core 4 respectively extend into the lead core holes of the upper sealing plate 2 and the lower sealing plate 9, respectively, between the upper connecting plate 1 and the lower connecting plate 10 Through the internal thread connection, the outer wall of the lead core 4 is wrapped with a constraining layer composed of 10 constraining springs 3, and 9 layers of stiffened steel plates 8 are arranged on the periphery of the constrained layer. The thickness of the stiffened steel plate 8 is 4mm, and the middle part is also processed with lead The core hole, the lead core 4 passes through the lead core hole and is perpendicular to the stiffened steel plate 8, and a stiffened steel plate 8 is separated from an adjacent stiffened steel plate 8 by a high damping rubber layer 7 with a damping ratio of 15%. The high damping rubber layer The two sides of 7 are extended to wrap the stiffened steel plate 8 to form a rubber column whose outer layer is a rubber layer 7. The high damping rubber layer 7 at the upper and lower ends of the rubber column extends outward to surround the upper sealing plate 2 and the lower sealing plate 9 respectively, and the upper sealing plate 2 and the lower sealing plate 9 are respectively surrounded. The cover of plate 2 and the cover of lower sealing plate 9 are aligned. the

When in use, the upper connecting plate 1 and the lower connecting plate 10 are respectively connected to the supporting beam body through the anchor bolts 6, the lead core 4 is wrapped by the restraining spring 3, and the spring and the high damping rubber layer 7 jointly assist the deformation recovery of the lead core 4, which accelerates the deformation of the lead core 4. The recovery time of bearing deformation is relatively small after the earthquake. the

Example 2

In the lead core high damping rubber shock-absorbing and isolation bearing of this embodiment, a carbon fiber fabric layer is used instead of the restraint spring 3 as the restraint layer to be wrapped on the outer wall of the lead core 4, passing through the upper sealing plate 2, the stiffening steel plate 8 and the lower sealing plate 9 Lead core hole, other parts and connection relation thereof are identical with embodiment 1. the

Example 3

In the lead-core high-damping rubber shock-absorbing and isolating bearings of the above-mentioned embodiments 1-2, the stiffening steel plate 8 has two layers, the thickness of the plate is 3 mm, and the damping ratio between one stiffening steel plate 8 and the other stiffening steel plate 8 is 10. % of the high damping rubber layer 7 is spaced apart, the periphery of the stiffened steel plate 8 is connected through the high damping rubber layer 7, and other components and their connection relationship are the same as the corresponding embodiments. the

Example 4

In the lead-core high-damping rubber shock-absorbing and isolating bearings of the above-mentioned embodiments 1-2, the stiffened steel plate 8 has 18 layers, the thickness of the plate is 5mm, and the damping ratio between one stiffened steel plate 8 and the other stiffened steel plate 8 is 18. % of the high damping rubber layer 7 is spaced apart, the periphery of the stiffened steel plate 8 is connected through the high damping rubber layer 7, and other components and their connection relationship are the same as the corresponding embodiments. the

Claims (6)

1. lead for retractable pencil high-damping rubber vibration absorption and isolation support, it is characterized in that: the inboard in upper junction plate (1), paste upper junction plate (1) and be provided with upper sealing plate (2), be provided with the lower connecting plate (10) symmetrical with upper junction plate (1) in the below of lower shrouding (9), in the inboard of lower connecting plate (10), lower shrouding (9) is set, be processed with the lead for retractable pencil hole at the center of upper sealing plate (2) and lower shrouding (9), be provided with lead for retractable pencil high-damping rubber assembly between upper sealing plate (2) and lower shrouding (9);

The two ends that above-mentioned lead for retractable pencil high-damping rubber assembly is lead for retractable pencil (4) extend to respectively in the lead for retractable pencil hole of upper sealing plate (2) and lower shrouding (9), outer wall at lead for retractable pencil (4) is enclosed with restraint layer, be provided with the put more energy into steel plate (8) vertical with lead for retractable pencil (4) central axis in the restraint layer periphery, sulfuration has high-damping rubber layer (7) around the steel plate of putting more energy into (8).

2. lead for retractable pencil high-damping rubber vibration absorption and isolation support according to claim 1, it is characterized in that: described restraint layer is restricted spring (3) or carbon fibre fabric.

3. lead for retractable pencil high-damping rubber vibration absorption and isolation support according to claim 1, it is characterized in that: the described steel plate of putting more energy into (8) is at least 2 layers.

4. lead for retractable pencil high-damping rubber vibration absorption and isolation support according to claim 1, it is characterized in that: high-damping rubber layer (7) edge at two ends, described up and down extends to the periphery of upper sealing plate (2) and lower shrouding (9), aligns with upper sealing plate (2) and lower shrouding (9) respectively.

5. lead for retractable pencil high-damping rubber vibration absorption and isolation support according to claim 1, it is characterized in that: described upper sealing plate (2) and lower shrouding (9) connect with upper junction plate (1) and lower connecting plate (10) respectively by threaded fastener.

6. lead for retractable pencil high-damping rubber vibration absorption and isolation support according to claim 1 is characterized in that: the damping ratio of described high-damping rubber layer (7) 〉=10%, and≤18%.

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