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Variable Stiffness Protection Device of Rubber Bearings in Seismic Isolated System
Author(s): 
Pages: 126-132
Year: Issue:  2
Journal: JOURNAL OF BEIJING UNIVERSITY OF TECHNOLOGY

Keyword:  基础隔震叠层钢板橡胶支座变刚度;
Abstract: 为了防止橡胶支座在低频激励下失稳破坏,按照多质点结构分析模型推导了不附加、右侧、左侧附加弹簧的运动方程及偏置方程,编制了相应的分析程序.通过在隔震层增设变刚度隔震保护装置作为第2道防线,进行了5层框架的变刚度隔震保护模拟地震振动台试验.理论分析和试验结果表明,变刚度隔震保护装置能有效改变结构动力特性,减小隔震层的变形,使之限制在允许的范围内,从而防止了橡胶垫失稳破坏,同时还能使上部结构的层间剪力不明显增大.
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