变刚度钢管混凝土短柱隔震装置的试验分析与研究

Experimental analysis and research on changeable stiffness base isolator with concrete filled steel tubular short columns

对变刚度钢管混凝土短往隔震装置在低周反复荷载试验中所出现的问题进行了阐述，指出了产生问题的原因，给出了较理想的装置型式．同时，为提高装置的隔震性能，笔者提出了第二梯队支座的概念，经过理论分析与试验验证，说明带有第二梯队支座的变刚度钢管混凝土短柱隔震装置具有良好的隔震性能。

The paper provides the detail analysis of some problems on quasi-static experiment of the changeable stiffness base isolator with concrete filled steel tubular(CFST) short colunms and gives the reason. As well, the correct style of the base isolator is given. In order to improve the effciency of the base isolator, the second step bearing is put forward. The changeable stiffness base isolator with CFST short colunms joined by the second step bearing shows its higher efficiency in the experiments and the theoretical analysis.