SMA high-energy-consumption self-resetting three-dimensional shock isolation device

Abstract

The invention discloses an SMA high-energy-consumption self-resetting three-dimensional shock isolation device. A horizontal shock absorption device, a vertical shock absorption device and a limiting device are adopted to form a shock isolation device capable of resisting horizontal vibration and vertical vibration. Under the action of a horizontal earthquake, a lower connecting plate and a middle connecting plate of the lower horizontal shock absorption device generate relative horizontal displacement, an energy-consumption lead core rubber shock isolation support generates horizontal displacement, an SMA wire in the energy-consumption lead core rubber shock isolation support is subjected to tensile deformation to participate in support energy consumption, and the self-resetting capacity is provided. According to the device, vertical vibration, caused by train running in a vehicle section in a building, of an upper structure can be attenuated, and the living comfort degree of the building is further improved; by means of the superelasticity of SMA, the energy consumption capacity and the self-resetting capacity of the horizontal shock absorption device are improved, the superelasticity of an SMA material is brought into play, the self-resetting capacity of the horizontal shock absorption device is improved, and residual deformation of the horizontal shock absorption device is reduced; and when the horizontal displacement of the rubber shock isolation support exceeds a displacement limiting value, the horizontal shock absorption device can play a limiting function.

Description

technical field [0001] The invention relates to the field of shock-absorbing control of building structures, in particular to an SMA high-energy-consuming self-resetting three-dimensional shock-isolation device. Background technique [0002] After the building adopts the isolation bearing, the response of the superstructure under the horizontal earthquake will be significantly reduced. The natural rubber isolation bearing and the lead core rubber isolation bearing are the most widely used isolation components in the field of structural isolation. Among them, natural rubber seismic isolation bearings have problems such as low horizontal stiffness and poor energy dissipation capacity. Lead core rubber seismic isolation bearings can rely on the plastic deformation of the built-in lead core to consume earthquake energy, but the lead in the bearing is a toxic substance. Under extremely rare earthquakes, if the isolation layer is damaged by displacement beyond the limit, it may ca...

AI Technical Summary

Problems solved by technology

Both the aforementioned two types of isolation bearings have the defect of not being able to resist vertical earthquakes; secondly, at low temperatures (lower than the end temperature of the SMA austenite phase transformation), the shape memory alloy material will lose its superelasticity and cannot achieve self-resetting ability

Images