A friction pendulum self-resetting vibration isolation device based on stp

Abstract

The invention discloses an STP (shear thickening plastomer)-based friction pendulum-type self-resetting shock-insulating device, and relates to the technical field of bridge shock insulation. The STP-based friction pendulum-type self-resetting shock-insulating device comprises an upper bearing platform plate, a high-damping rubber bearing, an upper partition board, a limiting slot, a polytetrafluoroethylene sliding layer, a honeycombed barrel with through holes, a hollow sleeve, an STP chamber, a stainless steel spherical sliding plate, a variable-curvature friction plate, a limiting plate, alower partition board and a lower bearing platform plate, wherein the high-damping rubber bearing, the upper bearing platform plate and the lower bearing platform plate form a high-damping rubber shock-insulating part; the upper partition board, the honeycombed barrel with the through holes, the hollow sleeve, the STP chamber, the stainless steel spherical sliding plate, the limiting plate and thelower partition board form a friction pendulum-type self-resetting shock-insulating energy-consuming part of an STP. In allusion to the defects that the conventional shock-insulating bearing is limited in energy-dissipating capacity, single in a damping force and incapable of self-resetting, the rate sensitive characteristic of the STP is utilized, and a variable-curvature base is designed for achieving self-resetting, so that horizontal multiple shock-resistant and damping energy dissipation in the shock-insulating process is achieved.

Description

technical field [0001] The invention mainly relates to the technical field of bridge shock isolation, and relates to a friction pendulum self-resetting shock isolation device based on STP materials. Background technique [0002] In order to reduce the seismic damage of bridges in earthquakes, the impact of earthquakes and vibrations on engineering structures must be considered in the structural design of bridges. For this reason, we have introduced vibration reduction and isolation technology, by setting The seismic isolation device is used to reduce the energy dissipation capacity of the structure, and at the same time control the displacement amplitude of the seismic isolation structure, thereby reducing the dynamic response of the structure and achieving the protection of the structure. [0003] Although ordinary rubber bearings have good shock isolation effect, their damping is small, and it is difficult to recover from deformation after an earthquake. The high-damping ...

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Problems solved by technology

[0005] Due to the fixed value of the radius of curvature of the traditional spherical friction pendulum isolation bearing, the ball pendulum is in the process of self-resetting motion, resulting in a constant isolation period of the bearing, while near faults are often accompanied by long-period pulses Shaped seismic waves, so it is easy to generate low-frequency resonance with the isolation structure

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