摘要
Abstract
This paper studies the theoretical analysis and numerical simulation of the multi-level friction pendulum isolation bearing,which consists of 7 sliding mechanisms and 6 sliding surfaces,totaling 9 sliding stages.The specific sliding states of each sliding stage of the multi-level friction pendulum isolation bearing and the constitutive models of each sliding stage are presented in the paper.The multi-level friction pendulum isolation bearing is modeled in entity by using the general finite element software ABAQUS,and its hysteretic characteristics under low-cycle reciprocating loads are investigated.The results indicate that the hysteretic curves of each sliding stage of the multi-level friction pendulum isolation bearing are symmetrical and plump,suggesting that the bearing possesses excellent energy dissipation capacity.Additionally,as the seismic excitation intensifies,it can adaptively regulate the stiffness and damping of the bearing,featuring good adaptive characteristics and outstanding energy dissipation capacity.With the increase of the vertical load,the horizontal stiffness of each sliding stage of the multi-level friction pendulum isolation bearing rises,the area encompassed by the hysteretic curve expands,and the energy dissipation increases.关键词
多级摩擦摆隔震支座/理论分析/数值模拟/滞回特性/回复能力Key words
multi-level friction pendulum isolation bearings/theoretical analysis/numerical simulation/hysteresis characteristics/recovery capability分类
土木建筑
