This study presents a finite element model for a hybrid self-centering damper considering the rate and temperature effects and explores the effects of different design parameters on the damper response. The damper, called as superelastic friction damper (SFD), consists of superelastic shape memory alloy (SMA) cables and a frictional energy dissipation mechanism. The experimental response of the SMA cables, frictional unit and overall damper at different loading frequencies and temperature are used to develop numerical model of the damper. Once a validated numerical model is obtained, parametric studies are carried out to evaluate force-displacement response of the damper when the design parameters are altered. The effects of damper design parameters on the equivalent stiffness, dissipated energy, equivalent viscous damping and self-centering capabilities of the damper are analyzed. Based on the findings, the recommendations for the design of the damper are presented.

中文翻译：

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混合自定心地震阻尼器：有限元建模和参数分析

本研究提出了考虑速率和温度影响的混合自定心阻尼器的有限元模型，并探讨了不同设计参数对阻尼器响应的影响。该阻尼器称为超弹性摩擦阻尼器（SFD），由超弹性形状记忆合金（SMA）电缆和摩擦耗能机构组成。SMA 电缆、摩擦单元和整体阻尼器在不同负载频率和温度下的实验响应用于开发阻尼器的数值模型。一旦获得经过验证的数值模型，就可以进行参数研究，以评估设计参数改变时阻尼器的力-位移响应。分析了阻尼器设计参数对阻尼器等效刚度、耗散能、等效粘性阻尼和自定心能力的影响。根据研究结果，提出了阻尼器设计的建议。