楼板隔震消能结构体系的参数优化

楼板隔震消能结构将部分楼板从主结构中分离出来,在楼板与梁之间设置高阻尼橡胶隔震支座,并在楼板与柱子之间的间隙设置消能阻尼器,从而形成一个大质量比的调谐质量阻尼器.文章对单层隔震楼板的参数优化问题进行了分析.结果表明:随着隔震楼板与主结构质量比的逐渐增大,隔震楼板与主结构最优频率比逐渐减小、最优阻尼比逐渐增大;主结构阻尼比越大,最优阻尼比越大、最优频率比越小.由于质量比较大,隔震楼板对减小主结构的响应非常有效.

Parameter optimization of the floorslab isolating and energy dissipating(FIED) structural system

In the floorslab isolating and energy dissipating(FIED) structural system,part of the floorslabs are isolated from the beams with high damping material and some dampers are set inside the gaps between the isolating floorslabs and the columns,so that a tuned mass damper with large mass ratio is actually formed.This paper has carried out the parameter optimization for the FIED structural system.It is found that with the increasing of the mass ratio of the isolating floorslab to the main structure,the optimum frequency ratio of the isolating floorslab to the main structure decreased and the optimum damping ratio of the isolating floorslab increased.The higher the damping ratio of the main structure,the lower the optimum frequency radio and the higher the optimum damping ratio.For having a large mass ratio,the FIED structural system is very effective in decreasing the seismic response of the main structure.