Development of a shape memory alloy-based friction damper and its experimental characterization considering rate and temperature effects
Development of a shape memory alloy-based friction damper and its experimental characterization considering rate and temperature effects
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DOI：
10.1016/j.engstruct.2022.115101
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发表时间：
2022-12
影响因子：
5.5
通讯作者：
A. Asfaw;Liang Cao;O. Ozbulut;J. Ricles
中科院分区：
文献类型：
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作者：
A. Asfaw;Liang Cao;O. Ozbulut;J. Ricles
为解决形状记忆合金(SMA)地震控制装置面临的两大挑战：(1)实际应用的受力能力不足；(2)耗能能力相对较低。这种混合阻尼器被称为超弹性摩擦阻尼器(SFD)，它利用了SMA拉索的高抗拉性和优异的自定心能力，以及摩擦阻尼器的非牺牲能量耗散。本文首先介绍了该阻尼器的组成和基本工作原理，并与现有的基于形状记忆合金的混合阻尼器相比，突出了该阻尼器的优点。然后，讨论了阻尼器样机的制作和实验测试。给出了阻尼器在不同位移幅值和加载速率下反复循环加载的力学响应。探讨了环境温度对所研制阻尼器滞回性能的影响。结果表明，该阻尼器具有稳定的滞回性能，对加载速率和温度的敏感性可以忽略不计。该阻尼器提供了12%的等效粘滞阻尼，并伴随着89%的峰值阻尼器位移恢复。
A new hybrid shape memory alloy (SMA)-based damper was developed to address two major challenges for SMA-based seismic control devices: (i) insufficient force capacity for real-world application and (ii) relatively low energy dissipation capacity. The hybrid damper, named Superelastic Friction Damper (SFD), leverages the high tensile resistance and excellent self-centering capability of SMA cables and non-sacrificial energy dissipation of a frictional damping mechanism. In this paper, the components and basic working principle of the proposed damper are first described, and the advantages of the proposed damper compared to the existing SMA-based hybrid dampers are highlighted. Then, the fabrication of a prototype damper and its experimental testing are discussed. The mechanical response of the damper under repeated cyclic loading at various displacement amplitudes and loading rates is revealed. The effects of ambient temperature on the hysteretic behavior of the developed damper are explored. Results reveal that the proposed damper exhibits stable hysteretic behavior with negligible sensitivity to the loading rate and temperature. The damper provides an equivalent viscous damping of 12 %, accompanied by 89 % recovery of the peak damper displacement.