Friction pendulum type shock absorption and isolation support seat

Abstract

The invention discloses a friction pendulum type shock absorption and isolation support seat, which comprises an upper seat plate, a lower seat plate, a double-spherical-surface rotating block and position limiting blocks, wherein the double-spherical-surface rotating block is arranged between the upper seat plate and the lower seat plate, the position limiting blocks are respectively and fixedly arranged on the lower surfaces of the left end part and the right end part of the upper seat plate in the transverse axial direction, one ends of the position limiting blocks are in contact with the side surface of the double-spherical-surface rotating block, the upper surface and the lower surface of the double-spherical-surface rotating block are respectively spherical surfaces, and the lower surface of the upper seat plate and the upper surface of the lower seat plate are provided with recessed spherical surfaces matched with the upper seat plate and the lower seat plate. The friction pendulum type shock absorption and isolation support seat has the beneficial effects that the friction energy consumption is obvious, the resetting function and the durability are good, the fireproof and wear-resistant functions are realized, the period is fixed, the structure is simple, the size is small, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of bridges, in particular to a friction pendulum type shock absorbing and isolating support. Background technique [0002] During an earthquake, the superstructure of the bridge has a certain amount of displacement and velocity relative to the pier, which causes the beam body to exert a force on the pier. Especially when the earthquake level is large, if the bridge bearing does not have a good shock absorption and isolation effect, it is very likely to cause the breakage of the pier bottom and the occurrence of beam falling accidents. my country has researched and developed various shock-absorbing and isolating devices by constantly learning from foreign research experience and combining its own characteristics and design requirements. At present, the shock-absorbing and isolation devices for bridges that have been applied in China mainly include lead rubber bearings and high-damping rubber bearings. In rec...

AI Technical Summary

Problems solved by technology

[0003] (1) Lead rubber bearings and high damping rubber bearings are difficult to meet the dynamic performance requirements of railway bridges due to their weak lateral stiffness. At the same time, due to the difficulty in ensuring the quality of rubber, the durability of the bearings cannot meet the expected results

[0004] (2) The bearing with damper has good damping characteristics, but when the vertical bearing capacity of the bearing is large, the structure of the bearing is complicated and the area occupied is huge, which makes the overall cost of the bridge higher; at the same time, the integral Seismic devices are mainly used to fix the support, resulting in excessive earthquake force on the fixed pier of the bridge. The failure of the horizontal restraint of the fixed support means that the support has been damaged. There are still many practical problems in the repair after the earthquake.

[0005] (3) There are also sliding frictional energy-dissipating bearings, the frictional surface of which is cold bonded or solidified, resulting in an unguaranteed friction coefficient; frictional energy consumption is not obvious; automatic reset is impossible after an earthquake

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