隔震支座布置方式对结构减震性能的影响分析

Isolation properties analysis under different ways of isolation bearings arrangement

隔震支座的布置方式会影响整个隔震层的刚度分布,从而关系到隔震效果。讨论了隔震支座的布置方式,分析了隔震支座的布置方式对隔震结构地震响应的影响,研究了结构的自振周期、楼层剪力、楼层位移以及结构的抗倾覆能力的变化情况。分析表明,不同的支座布置方式对结构的自振周期、楼层剪力、楼层位移以及抗倾覆能力均有较大影响,合理的支座布置方式可以改善结构的地震响应,从而取得更好的隔震效果。

The stiffness distribution of the isolation layer and the isolation effect are badly influenced by the ways of isolation bearings arrangement. The ways of isolation bearings arrangement were discussed, and the seismic reaction of isolated structure influenced by the ways of isolation bearings arrangement was analyzed. The variation of natural vibration period, story shear force, story displacement and anti-overturning ability were all studied. The result shows that all the four parameters above are changed under different ways of isolator bearings arrangement. Seismic reaction of isolation structure decreases obviously with reasonable isolation bearings arrangement, so as to achieve better isolation effect.