Seismic Vibration Control Using Superelastic Shape Memory Alloys
Seismic Vibration Control Using Superelastic Shape Memory Alloys
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DOI：
10.1115/1.2203109
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发表时间：
2006-07
影响因子：
1.2
通讯作者：
J. McCormick;R. DesRoches;D. Fugazza;F. Auricchio
中科院分区：
文献类型：
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作者：
J. McCormick;R. DesRoches;D. Fugazza;F. Auricchio
对超弹性 NiTi 形状记忆合金 (SMA) 线材和棒材进行研究，以确定其阻尼和定心能力，用于地震载荷下建筑物的结构控制。这些研究完善了有关 SMA 在结构抗震设计和改造中使用的知识库。结果表明，奥氏体形状记忆合金的阻尼性能普遍较低。然而，加载至 6% 应变后获得的残余应变通常<0.75%。一般来说，结果表明，大直径棒材的性能与非土木工程应用中使用的线材样本一样好。然后将小规模振动台测试的结果作为 SMA 交叉支撑系统的概念研究证明。这些结果通过解析非线性时程分析得到验证。最后，对采用传统钢制屈曲支撑系统或 SMA 支撑系统的三层钢框架进行分析，以确定使用 SMA 支撑系统是否具有优势。结果表明 SMA 支架改善了支撑框架的响应。
Superelastic NiTi shape memory alloy (SMA) wires and bars are studied to determine their damping and recentering capability for applications in the structural control of buildings subjected to earthquake loadings. These studies improve the knowledge base in regard to the use of SMAs in seismic design and retrofit of structures. The results show that the damping properties of austenitic SMAs are generally low. However, the residual strain obtained after loading to 6% strain is typically <0.75%. In general, it is shown that large diameters bars perform as well as wire specimens used in non-civil-engineering applications. The results of a small-scale shake table test are then presented as a proof of concept study of a SMA cross-bracing system. These results are verified through analytical nonlinear time history analysis. Finally, a three-story steel frame implementing either a traditional steel buckling-allowed bracing system or a SMA bracing system is analyzed analytically to determine if there is an advantage to using a SMA bracing system. The results show that the SMA braces improve the response of the braced frames.