Simulations of a Variable Friction Device for Multihazard Mitigation
Simulations of a Variable Friction Device for Multihazard Mitigation
复制标题
用于缓解多种危险的可变摩擦装置的模拟
DOI：
10.1061/(asce)st.1943-541x.0001580
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
J. Ricles
中科院分区：
文献类型：
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作者：
Liang Cao;S. Laflamme;Douglas P. Taylor;J. Ricles
摘要本文研究了一种新型半主动阻尼装置在减轻非同时多害载荷方面的性能。该装置被称为改良摩擦装置（MFD），此前已由作者提出。它由基于汽车鼓式制动技术的可变摩擦系统组成。该装置已在实验室环境中进行了演示，并对其动态行为进行了建模。利用该模型对两种具有代表性的结构进行了数值模拟，一种是位于日本的矮楼，另一种是位于美国马萨诸塞州波士顿的高层建筑。模拟的危险包括风、爆炸和地震荷载。考虑了各种控制情况，包括五组不同控制权下的半主动控制，以及被动粘性和被动摩擦对基准性能的影响。结果表明，只要使用正确的控制权重，半主动控制案例在绝大多数危害和性能指标上都优于所有其他案例。
AbstractThis paper investigates the performance of a novel semiactive damping device at mitigating nonsimultaneous multihazard loads. The device, termed modified friction device (MFD), has been previously proposed by the authors. It consists of a variable friction system based on automotive drum brake technology. The device has been demonstrated in a laboratory environment, and its dynamic behavior has been modeled. This model is used to conduct numerical simulations on two representative structures, one short building located in Japan and the other tall building located in Boston, MA. Simulated hazards include wind, blast, and seismic loads. Various control cases are considered, including semiactive control under five different sets of control weights, and passive viscous and passive friction to benchmark performance. Results show that the semiactive control cases outperforms all of the other cases for the vast majority of hazards and performance indices, provided that the right control weights are utilized.