一种设置竖式水平隔震层的高层隔震结构抗倾覆措施及初步分析

Anti-overturning measure and preliminary analysis of a high-rise isolated structure with upright horizontal isolated layer

高层结构采用隔震措施后,一方面由于缺少可行的抗拉措施导致隔震层抗倾覆能力不足;另一方面由于高层结构自振周期较长导致隔震效果不及自振周期较短的多层结构,使得高层结构隔震受到限制。为此本文采取一种高层结构水平隔震措施,除水平隔震层外,设置竖式水平隔震层及固定构件,对隔震结构沿高度提供抗倾覆水平力及阻尼。这种措施构造上具备充分的抗倾覆、抗风、耗能能力。初步时程分析结果表明,大震作用下结构处在弹性状态,隔震效果显著。

The apply of isolate technology to high-rise structure is limited,one reason is that the ability of resisting overturning moment isn’t enough,another reason is that the isolated effect on high-rise structure isn’t better than multi-floor structure with a shorter natural vibration period.In this paper,a isolating method is introduced,besides the horizontal isolated layer,one upright horizontal isolated layer and fixed element is set also,so the horizontal force and damping distributed over the structural height is offered.Such measure has sufficient anti-overturning,wind-resistant and damping capabilities.The primary analyze result confirms that the isolated structure is elastic under strong earthquake,and the seismic isolation effect is significant.