A hybrid self-centering seismic damper: Finite element modeling and parametric analysis
A hybrid self-centering seismic damper: Finite element modeling and parametric analysis
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DOI：
10.1177/1045389x231215377
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发表时间：
2024-01
影响因子：
2.7
通讯作者：
Sasa Cao;Fei Shi;Liang Cao;James Ricles;O. Ozbulut
中科院分区：
文献类型：
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作者：
Sasa Cao;Fei Shi;Liang Cao;James Ricles;O. Ozbulut
本研究提出一种混合式自定心阻尼器的有限元素模型，考虑速率和温度的影响，并探讨不同的设计参数对阻尼器响应的影响。该阻尼器由超弹性形状记忆合金拉索和摩擦耗能机构组成，称为超弹性摩擦阻尼器（SFD）。通过SMA索、摩擦单元和整体阻尼器在不同加载频率和温度下的试验响应，建立了阻尼器的数值模型。一旦得到一个有效的数值模型，进行参数研究，以评估当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的等效刚度、耗能、等效粘滞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。
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.