单跨飞机库结构的减震控制动力分析

Dynamic analysis on seismic vibration control of a single-span hangar

对于构造形式较为典型的大型单跨飞机库结构,提出在支承柱列设置粘滞阻尼器的方案,进行减震控制研究。按7度设防要求,对飞机库设置与未设置粘滞阻尼器的情况,分别采用3条地震波输入,计算在小震和中震下各自的结构动力时程反应,分析对比在结构总地震作用、支承柱列柱顶位移和内力等方面的减震效果。结果表明:在支承柱列设置粘滞阻尼器,使在地震工况下的结构总地震作用、柱顶位移、柱剪力及弯矩等明显减小,并改善了由结构不对称导致的整体扭转效应,是一项可行且有效的减震措施。

Seismic vibration control of a typical single-span hangar with viscous dampers in its column rows is studied. Based on the seismic fortification intensity of 7, seismic response time-history analyses of the hangar structure with and without the dampers are performed for 3 different earthquake time-history inputs, according to minor and moderate earthquake levels, respectively. The total seismic actions, lateral drifts of the supporting columns and their internal forces for the structure with and without dampers are compared for evaluation of the effects of use of viscous dampers on seismic vibration reduction. The results show that those structural seismic responses mentioned above are significantly decreased and the global torsion due to the irregularity of the structure is reduced with viscous dampers. So this seismic measure is effective and practical.