Horizontal omnidirectional displacement amplification type SMA energy dissipation and seismic mitigation device

Abstract

The invention provides a horizontal omnidirectional displacement amplification type SMA energy dissipation and seismic mitigation device, and belongs to the technical field of structural vibration control. The device is composed of a top plate, a spherical ring, a gourd-shaped rotating ball body, a high-strength bolt, a lever arm, a hollow circular truncated cone, an SMA stranded wire, a U-shapedlocking ring, a bottom plate, a fastening clamp, a spring bolt and the like. According to the device, through the omnidirectional rotation capacity of the gourd-shaped rotating ball body, the device can still utilize hysteretic deformation of the SMA stranded wire to consume energy under the effect of random and unpredictable multidirectional earthquake, and therefore 360-degree omnidirectional effective damping is provided. Meanwhile, the device amplifies the relative displacement of a pier beam of a bridge structure through a lever spherical hinge rotating mechanism, so that the displacement, speed and other responses of the series energy dissipation material are amplified, and the device can play a good energy dissipation role under the effect of large, medium and small earthquakes. Thedevice is clear in structure and high in applicability, and is a safe and efficient energy dissipation and seismic mitigation device.

Description

technical field [0001] The invention relates to a horizontal omnidirectional displacement amplifying SMA energy-dissipating shock-absorbing device applied to civil engineering, belonging to the technical field of structural vibration control, and in particular to a horizontal omnidirectional displacement amplifying type of energy-dissipating and shock-absorbing components at the bottom of bridge structural beams SMA energy dissipation shock absorber. Background technique [0002] Bridge damping design is an effective way to reduce bridge earthquake disasters, and the development of energy-dissipating damping devices with reliable performance and good damping effect is a key issue in bridge damping design. In the past two decades, the research and application of energy-dissipating shock-absorbing technology has made great progress. However, most of the research on energy-dissipating shock-absorbing devices by scholars from various countries is limited to a single direction, w...

AI Technical Summary

Problems solved by technology

In the past two decades, the research and application of energy-dissipating shock-absorbing technology has made great progress. However, most of the research on energy-dissipating shock-absorbing devices by scholars from various countries is limited to a single direction, which cannot be well adapted to the actual random and direction-unsuitable conditions. The role of predicted, multidimensional earthquakes and other hazards

[0003] The speed and displacement of the existing displacement or velocity-dependent energy-dissipating shock absorbers are equal to the relative velocity and displacement of the connecting point. If the relative velocity and displacement of the connecting point are relatively small, the energy-dissipating shock-absorbing device cannot fully exert its its energy consumption

Moreover, in order to increase the ability of providing damping force, the current energy-dissipating shock absorbing devices often adopt the method of increasing the size of the damper or increasing the number of dampers, but the effect is not ideal

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