Self-resetting viscous damper based on combined spring

Abstract

The invention discloses a self-resetting viscous damper based on a combined spring. The damper comprises a viscous damping energy dissipation device, a spring resetting device and a force transmission device, the viscous damping energy dissipation device is in linkage with the spring resetting device through the force transmission device, and the force transmission device comprises an outer force transmission component and an inner force transmission component. The outer force transmission component comprises a barrel, the viscous damping energy dissipation device and the spring resetting device are both installed in the barrel, the inner force transmission component is a guide rod, the guide rod is arranged in the axial direction of the barrel, and a piston in the viscous damping energy dissipation device is fixedly connected to the guide rod. The spring resetting device comprises a resetting spring piece and two bearing plates arranged at the two axial ends of the resetting spring piece respectively, and the resetting spring piece and the bearing plates are connected to the periphery of the guide rod in a sleeving mode and can slide relative to the guide rod. The damper is excellent and controllable in self-resetting capability, can stably consume energy under high and low frequency excitation, has an overload protection characteristic, is symmetrical in tension and compression performance, is convenient to assemble, and is easy to disassemble and maintain.

Description

technical field [0001] The invention belongs to the technical field of energy dissipation and shock absorption in civil engineering, and relates to a self-resetting viscous damper based on a combined spring. Background technique [0002] Energy-dissipating and shock-absorbing structures refer to structures that use energy-dissipating devices to generate relative displacements and relative velocities through structural deformation during structural vibration, so that the energy-dissipating devices can consume structural vibration energy, thereby reducing the structural seismic response and meeting the expected seismic design requirements. building structure. Common energy dissipation devices can be divided into displacement dampers (such as friction dampers, metal yield dampers) and velocity dampers (such as viscous dampers, viscoelastic dampers). Although the energy-dissipating and shock-absorbing structures designed in accordance with the requirements of my country's seism...

AI Technical Summary

Problems solved by technology

When the balance plate is in the initial equilibrium position, no matter whether the return spring applies prestress or not, its return resultant force is zero; when the damper has a non-negligible initial internal friction force or when the structure undergoes plastic deformation, due to the existence of return resistance, The balance board cannot fully return to the initial equilibrium position, the return spring on one side will be compressed, and the return spring on the other side will be pulled, which together provide a return resultant force that is balanced with the return resistance. Therefore, the self-reset damper can only Implement partial self-resetting of structures

At the same time, the self-resetting viscous damper has limited energy dissipation capacity under low-frequency vibration

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