地震动相位谱和幅值谱对结构地震反应影响的研究  

Study on the influence of seismic phase spectrum and amplitude spectrum on structural seismic response

作　　者：董婷婷 王志涛[2] 田杰[1] Dong Tingting;Wang Zhitao;Tian Jie(College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China;Institute of Earthquake Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京工业大学抗震减灾研究所,北京100124

出　　处：《建筑科学》2019年第3期125-133,共9页Building Science

摘　　要：为了研究地震动的相位谱和幅值谱对结构地震反应的影响,本文以某钢筋混凝土建筑结构为例,通过输入一系列具有相同幅值谱、不同相位谱和具有相同相位谱、不同幅值谱的地震动时程,开展了结构弹性和弹塑性分析。结果显示,相位谱和幅值谱的差异对结构地震反应均有显著影响,不同场地和震级分组的地震动相位谱和幅值谱对结构地震反应的影响明显不同,并且对弹塑性反应的影响大于弹性反应。因此,在进行结构时程分析选取输入地震动时程时,应同时考虑幅值谱与相位谱的影响。In order to study the influence of phase spectrum and amplitude spectrum of ground motion on structural seismic response,a reinforced concrete building structure is taken as an example.The elastic and elastic-plastic analysis of structures is carried out by inputting a series of seismic history with the same amplitude spectrum,different phase spectrum and a series of seismic history with the same phase spectrum,different amplitude spectrum.The results show that the discrepancy of phase spectrum and amplitude spectrum has a significant effect on the seismic response of the structure,and the ground motion phase spectrum and amplitude spectrum of different magnitudes under different site conditions have different effects on the seismic response.And the effect on the elastic-plastic response is greater than that on the elastic response.Therefore,the influence of amplitude spectrum and phase spectrum should be taken into account when selecting the input ground motion for structural time history analysis.

关 键 词：相位谱 幅值谱 时程分析 地震反应 

分 类 号：P315.311[天文地球—地震学]