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双向地震动输入对高层隔震结构的响应影响研究

DOI: 10.13197/j.eeev.2014.06.33.liul.005, PP. 33-41

Keywords: 高层建筑,基础隔震,地震动输入,单向,双向

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Abstract:

我国现行建筑抗震设计规范中对于隔震结构分析时地震动的单双向输入问题并无明确说明.鉴于高层隔震结构及隔震支座体系的特殊性,本文对西昌(9度区)某高层隔震结构进行分析,选取了7组地震动,比较了双向地震动输入与单向地震动输入相比后该高层隔震结构的加速度、位移、支座应力等响应的差别.研究发现高层隔震结构的四个角部支座在单向地震动输入下拉、压应力未超过规范规定限值,而在双向地震动输入下均超过规范规定限值.针对双向输入时隔震支座出现的应力超限问题,提出了解决方案.建议在对隔震结构尤其是高层隔震结构进行计算分析时,采用双向地震动输入并加强抗拉支座的研发工作.

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