不同谱拟合方法对场地地震反应的影响研究

发布时间：2018-04-27 21:31

本文选题：时域修正方法 + 频域修正方法　；参考：《世界地震工程》2014年04期

【摘要】：在结构的抗震分析中.为使地震波的加速度反应谱能够与目标谱拟合,提出了不同的谱拟合方法。由于场地条件影响结构场地的危险性分析及结构反应分析,因本文旨在研究不同谱拟合方法对场地地震响应的形响。根据某实际场地的目标反应谱选择14条实测地震波,对时城修正方法和频域修正方法对场地地震反应的影响进行了评估,且选择了循环应力比率和场地放大系数以及有限滑动位移等参数来表征场地的地震反应。研究表明,使用时域修正方法与频域方法会使循环应力比率比放缩方法略微减少,而场地放大系数基本一致。对于有限滑动位移而言,在较浅的土层,放缩法所得到的有限滑动位移略大,而对于较浅的土层,则得到位移较小。
[Abstract]:In the seismic analysis of the structure. In order to fit the acceleration response spectrum of seismic wave with the target spectrum, different spectral fitting methods are proposed. Because of the influence of site conditions on the risk analysis and structural response analysis of structural sites, this paper aims to study the shape response of different spectral fitting methods to site seismic responses. According to the target response spectrum of an actual site, 14 measured seismic waves are selected, and the influence of the time-city correction method and the frequency-domain correction method on the site seismic response is evaluated. The cyclic stress ratio, site magnification factor and finite sliding displacement are selected to characterize the seismic response of the site. The results show that the cyclic stress ratio is slightly reduced by using the time domain correction method and the frequency domain method, and the site magnification factor is basically the same. For the finite sliding displacement, in the shallow soil layer, the finite sliding displacement obtained by the scaling method is slightly larger, but for the shallow soil layer, the displacement is smaller.
【作者单位】：河南理工大学;
【基金】：国家自然科学基金(51304072)
【分类号】：U442.55

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