【摘要】 选取欧洲强震记录数据库中,同一台站记录到的两次地震以及两个不同台站记录到的同一地震的强震记录,分析了它们的PGA比值、卓越频率和反应谱的不确定性以及不确定性对结构反应的影响,得出:影响地震动不确定性的因素主要有震源机制、地震波传播途径、场地类别等。在此基础上,进一步分析了地震动不确定性对结构反应的影响。更多还原

【Abstract】 From the European strong ground motion database,on the basis of the same magnitude,epicenter distance and similar site condition,we collect the accelerations recorded by the same station but from different earthquakes and by different stations but from the same earthquake,and analyze the certainty of the PGA ratio of the corresponding components,predominant frequency and response spectra.The results show that there are many factors influencing the uncertainty of ground motion,such as focal mechanism,path of seismic wave propagation and site type,etc.According to this,we further analyze the influence of the uncertainty on structural response.更多还原