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工程力学  2015 

地震动记录调整中反应谱控制周期及有效性分析

DOI: 10.6052/j.issn.1000-4750.2014.05.S050

Keywords: 地震动调整,加速度反应谱,控制周期,相关性分析,谱形参数,解耦

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Abstract:

反应谱控制周期是调整地震动记录时拟合目标谱所须考虑的关键因素之一,而目前的抗震设计规范对此还缺乏统一的定量依据。针对该问题,该文通过对不同周期对应的加速度反应谱向量与结构最大层间位移角进行相关性分析,初步讨论了对结构非线性地震反应有重要贡献的反应谱的周期特征,并引入反应谱形参数,对Sa(T1)的控制作用进行解耦,最后结合大量的统计分析和归一化处理,建议了地震动记录调整中所需要控制的关键周期范围。分析结果表明:对于低层结构,结构基本周期已能基本满足要求;对于中高层结构,0.2T1~2T1是比较合适的控制周期范围。

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