与建筑抗震设计规范相对应的地面地震动随机模型参数研究  

Study on the Random Model Parameters of Ground Motion Corresponding to the Architectural Aseismic Code

作　　者：潘晓东[1] 秦从律[2] 钱磊[2] 

机构地区：[1]浙江工业大学建工学院,杭州310032 [2]浙江大学建筑设计研究院,杭州310027

出　　处：《地震研究》2005年第1期82-85,共4页Journal of Seismological Research

摘　　要：根据《建筑抗震设计规范(GB50011-2001)》的反应谱曲线,确定了基于Clough-Penzien修正过滤白噪声模型的参数取值。采用时间包络函数考虑地震的非平稳特性,根据加速度峰值等效原则迭代计算得到地面的加速度功率谱密度曲线,然后通过曲线拟合得到与规范各种地震烈度、场地类别和设计地震分组相对应的谱参数。计算结果表明,与规范相对应的加速度功率谱密度曲线呈双峰型,Clough-Penzien谱能较好地拟合其曲线形状。最后给出了规范各种工况下的地面加速度功率谱参数值,为随机抗震计算分析提供了依据。The parameters of Clough-Penzien model are obtained based on the response spectrum curve in the Chinese Seismic Code (GB 50011-2001). The power spectral density (PSD) of the acceleration at the ground level is evaluated by an iterative approach according to the equivalence principle of peak acceleration. The non-stationary nature of the ground motion is represented by the envelope function. The Clough-Penzien acceleration spectrum is selected to model the calculated PSD curve. The results show that the Clough-Penzien spectrum can fit the PSD curve well. The parameters of random model of ground motion given in this study provide relatively reliable and accurate earthquake motion input for stochastic seismic response analysis of structures.

关 键 词：非平稳 地震动 功率谱密度 随机模型 

分 类 号：P315.9[天文地球—地震学]