钢-混凝土混合结构减振理论与试验分析

SHOCK ABSORPTION THEORY AND EXPERIMENT ANALYSIS OF STEEL CONCRETE HYBRID STRUCTURE

采用双质点模型,建立钢-混凝土混合结构的非线性运动方程,并通过设置橡胶隔震支座及阻尼器和支座的不同组合方式,对结构进行振动台试验。试验表明,橡胶隔震支座对隔震层和上部结构的加速度及位移均能起到很好的控制作用;在上部结构加设粘滞阻尼器后,隔震层的加速度和位移均有所减小,但减小幅度不大,而顶层的加速度和位移均出现大幅度减小,说明在设置隔震支座的基础上,通过粘滞阻尼器的布置能达到较好的减震效果。

This paper adopted the double-particle model to establish the nonlinear motion equations of the light steel-concrete hybrid structure and tested the structure through shaking table based on the different conditions between rubber bearings and dampers and bearing. It was showed that the laminated rubber bearing kept well control effect on the isolation layer and acceleration of the superstructure. More specifically, when adding viscous damper to the superstructure, the displacement and the acceleration of the isolation layer both slightly decreased, however, the decrease is extremely evident on the top, which illustrated it could achieve a better damping effect to arrange a viscous damper based on setting isolation bearing.