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发布时间：2019-03-09

论文类型：期刊论文

发表时间：2013-03-01

发表刊物：STRUCTURAL CONTROL & HEALTH MONITORING

收录刊物：Scopus、EI、SCIE

卷号：20

期号：3

页面范围：405-421

ISSN号：1545-2263

关键字：pseudo-negative stiffness control; homogeneity; MR damper; base isolation; real-time hybrid testing

摘要：Pseudo-negative stiffness control is a control scheme that is aimed to track, in a passive energy dissipation fashion, a target spring force with negative stiffness when possible. In this study, it is proved that systems with pseudo-negative stiffness control have the property of homogeneity even though they are nonlinear systems. The harmonic response analyses reveal that the pseudo-negative stiffness reduces the resonant frequency of the system. Seismic response spectrum analyses show that both acceleration and displacement can be reduced with the pseudo-negative stiffness control when the structural period is long and damping level is not high. Pseudo-negative stiffness control of a five-story base-isolated structure incorporating magnetorheological damper is studied through analytical and real-time hybrid test methods. The results show that displacement and acceleration responses with pseudo-negative stiffness control are lower than those with passive-off control and isolator alone, whereas the displacement response with pseudo-negative stiffness is greater than the passive-on control. Copyright (C) 2011 John Wiley & Sons, Ltd.