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砌体结构有限元模型在结构地震响应中的应用

DOI: 10.13197/j.eeev.2014.01.123.and.016, PP. 123-130

Keywords: 砌体墙宏观模型,低周反复加载,滞回曲线,地震响应,非平稳

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Abstract:

本文使用SeismoStruct软件建立了砌体结构的有限元模型,并设计制作带构造柱圈梁的两层砖砌体结构,进行低周反复加载下的抗震性能试验,研究了滞回特性和承载力情况,将有限元与试验结果进行对比分析。随后采用这一有限元模型,输入强震记录、人工合成以及调整后的强震记录等3种不同类型的地震动,以层间位移角作为结构地震响应的重要参数,研究了不同地震动参数影响下的结构响应并分析其相关系数。研究结果表明有限元模型能够较好地模拟该砌体结构的滞回特性,模拟与试验结果基本吻合;在本文考虑的四种地震动参数中,Housner强度对结构地震响应的影响最大,相关性最强;考虑非平稳性的地震动输入对结构响应有明显的增大效应。

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