Effectiveness of particle tuned mass damper devices for pile‐supported multi‐story frames under seismic excitations
Effectiveness of particle tuned mass damper devices for pile‐supported multi‐story frames under seismic excitations
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DOI：
10.1002/stc.2627
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发表时间：
2020-08
影响因子：
5.4
通讯作者：
Shutong Liu;Zheng Lu;Peizhen Li;Wenyang Zhang;E. Taciroğlu
中科院分区：
文献类型：
--
作者：
Shutong Liu;Zheng Lu;Peizhen Li;Wenyang Zhang;E. Taciroğlu
近年来，颗粒调谐质量阻尼器(PTMD)在降低大型结构的抗震需求方面受到了广泛的关注。然而，对于土-结构相互作用(SSI)体系在地震作用下的PTMDS控制性能的研究还是空白。本文通过振动台试验和数值模型模拟，对桩基支撑多层框架的PTMD装置的有效性进行了全面的研究。通过与无外阻尼器系统的比较，分析了颗粒阻尼器的减振效果。试验结果表明，当存在SSI效应时，PTMDs对结构最大加速度和最大位移的抑制作用减弱，颗粒阻尼改善了常规TMDs的控制性能。还建立了测试试件的详细有限元模型--包括SSI效应--并根据测试数据进行了初步验证。在这些模型中，土的非线性用边界面塑性模型来考虑，PTMD装置用解析模型简化为等效单颗粒阻尼器。经过验证的数值模型可以用于进一步的参数研究，包括基于性能的地震工程框架内的最优PTMD设计和部署。
Particle tuned mass dampers (PTMDs) have attracted recent attention for reducing seismic demands on large structures. Yet, research on the control performance of PTMDs for soil–structure interaction (SSI) systems under earthquake excitations is non‐existent. This paper presents a comprehensive investigation on the effectiveness of PTMD devices for pile‐supported multistory frames through shaking table tests and simulations with validated numerical models. Particle damping effectiveness is analyzed through comparisons with systems lacking external damping. The test results show that the mitigation effects of PTMDs on the maximum structural accelerations and displacements decrease when SSI effects are present and that particle damping improves control performance of conventional TMDs. Detailed finite element models of the tested specimens are also constructed—including SSI effects—and validated initially against the test data. In these models, the soil nonlinearities are considered using a bounding surface plasticity model, and the PTMD devices are simplified to an equivalent single‐particle damper using an analytical model. The validated numerical models can be used in further parametric studies involving optimal PTMD design and deployment within a performance‐based seismic engineering framework.