Feasibility study of passive energy dissipation devices for the seismic protection of low-frequency structures
It is well known that base-isolation technologies benefit a building structure by reducing its response in terms of floor acceleration,but at the expense of large isolator displacements.Traditional damping devices like viscous or hysteretic damping devices can be supplemented at the isolator layer to reduce displacement,consequently leading to larger structural acceleration responses and thus compromising the effects of isolators,when the structures are subjected to more common high-frequency ground motions.Rate-independent linear damping(RILD)is a promising alternative for improving the performance of isolation systems,because it can yield lower restoring forces and acceleration responses with displacement reduction levels almost identical to other damper types.However,its non-causality causes major difficulties in time-domain analysis and in its physical implementation.Recently,the authors developed a passive system to implement RILD by combining negative stiffness and Maxwell elements in parallel.In this study,the feasibility of the proposed system for achieving simultaneous reduction of isolator displacement and floor response acceleration in a base-isolated structure is investigated,and the effect of the supplemental damping ratio on the seismic performance of the base-isolated structure incorporated in the proposed system is evaluated by conducting parametric studies.
rate-independent linear damping Maxwell model seismic isolation lowfrequency structure
H.Luo C.Chong H.Higano K.Ikago N.Inoue
School of Engineering,Tohoku University,Sendai,Japan School of Civil Engineering,Guangzhou University,Guangzhou,China International Research Institute of Disaster Science,Tohoku University,Sendai,Japan
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
341-350
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）