隔振支座对大跨度网壳的振动控制分析

本文通过建立了橡胶隔振支座与设置隔振支座的网壳结构的力学模型,研究了隔震支座控制下,大跨度空间单层柱面网壳结构在地震作用下振动响应,结果表明:隔震支座对结构的振动可以起到良好的控制作用,但地震强度对隔震支座耗能能力影响较大,在最大水平行程内,地震强度越大,耗能能力越强;在不同地震波作用下,隔振网壳结构体系的振动控制效果有所不同,其中:EL Centro波作用的结构被动控制效果最佳。

Analysis on vibration control of long span reticulated shell with rubber isolation bearing

Mechanical model of finite element of rubber isolation and reticulated shell is established, vibration response of single-layer cylindrical reticulated shell structure installed the rubber isolation bearing under earthquake is investigated by numerical method. The results show that isolation bearing can play a good control effect on vibration of the structure, however, seismic intensity can influence the energy dissipation capacity of isolation bearing, energy dissipation ability increases with the increase of the earthquake intensity in maximum range, under the effect of different seismic wave, the vibration control effect of the isolation structure is different; in addition, the vibration control effect of the isolation structure is the best under the seismic wave of EI Centro.