组合耗能系统的振动台试验与分析

Shaking Table Test and Numerical Analysis of Integral Energy Dissipation System

在一座三层单跨的钢结构模型中安装了金属耗能器及其和油阻尼器并联组合 ,对这两种耗能体系进行了振动台试验 ,以研究耗能体系的动力特性 ,检验其减振效果。试验结果表明 :组合耗能体系对位移有良好的减振效果 ;在小震时 ,对结构加速度峰值的减振效果不太明显 ,在大震情况下 ,基本上都能减小结构加速度峰值 ;耗能器的刚度与阻尼之间存在匹配关系。最后进行了数值分析 ,并与试验结果进行了比较 。

Shaking table tests on a three story one bay steel frame model with metallic yield dampers and their parallel connections with oil dampers are carried out to study the dynamic characteristics and aseismic performance of the energy dissipation system. In these tests, integral energy dissipation system can suppress structural vibration with satisfaction displacement. But structural acceleration amplitude can not evidently be reduced under small intensity exciation from seismic wave. In most cases it is the other way round under large intensity exciation from seismic wave. Test results also show that the stiffness of the energy dissipation devices should satisfy the relatived with match the damping. The validity of the numerical model and analysis method are verified by the comparision between the results of the shaking table tests and numerical analysis.