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为研究所设计的形状记忆合金(SMA)-叠层橡胶支座在多遇地震下的隔震性能.采用Auricchio&Sacco本构模型对SMA材料进行数值模拟,验证此本构模型能够较好的描述SMA材料的超弹性特性;对SMA材料进行了超弹性拉伸试验,研究了应变幅值、加载速率和循环次数等因素对SMA超弹性力学性能的影响;通过建立SMA-叠层橡胶支座模型,有限元分析得到恢复力-位移滞回曲线,分析了位移和荷载变量对支座的等效水平刚度、等效阻尼比和单位循环耗能的关系.结果表明:SMA-叠层橡胶支座在多遇地震下表现出较好的耗能能力和水平刚度,且随着地震灾害的加剧,这些优良特性表现出稳定上升趋势,说明SMA-叠层橡胶支座确实具有有更理想的隔震效果.
Which is the seismic isolation performance of the shape memory alloy (SMA) -layered rubber bearing designed by the Institute under the condition of frequent earthquakes.The numerical simulation of the SMA material by using the Auricchio & Sacco constitutive model verifies that this constitutive model can better describe the SMA The superelastic properties of SMA were studied. The superelastic tensile tests on SMA materials were carried out. The effects of strain amplitude, loading rate and number of cycles on the superelasticity of SMA were studied. By setting up SMA-laminated rubber bearing model, The relationship between displacement and load variables’ equivalent horizontal stiffness, equivalent damping ratio and energy consumption per cycle is analyzed.The results show that SMA-laminated rubber bearing In the case of frequent earthquakes, it shows good energy dissipation capacity and horizontal stiffness, and these excellent features show a steady upward trend with the increase of earthquake disasters, indicating that the SMA-laminated rubber bearing does have a better isolation effect .