对应新抗震规范反应谱的功率谱模型参数研究
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（1 同济大学建筑工程系，上海 200092； 2 同济大学建筑设计研究院（集团）有限公司，上海 200092）[摘要] 本文根据《建筑抗震设计规范》（GB 50011—2010），对随机地震动功率谱模型（杜修力-陈厚群模型）参数的取值进行了研究。通过最小二乘法用杜修力-陈厚群模型去拟合由现行抗震规范反应谱曲线转换得到的功率谱密度函数，从而确定规范中不同场地类别和设计分组所对应的场地土阻尼比 和卓越角频率 以及小震、中震、大震下对应的谱强度因子 。本文确定的模型参数与我国新抗震规范建筑场地类别的划分相协调, 便于实际应用。[关键词] 建筑抗震设计规范; 杜修力-陈厚群功率谱; 功率谱密度函数中图分类号：P315.9 文献标识码：A 文章编号：1002-848X(2013)S2-0430-06作者简介：周佩佩，工学硕士，助理工程师，Email:maqiyaduo11@126.com。Parameters research on seismic power spectrum model based on the new seismic design code for buildingsZhou Peipei1, Chao Si1,2(1 Department of Building Engineering, Tongji University, Shanghai 200092, China; 2 Tongji Architectural Design (Group) Co. , Ltd. , Shanghai 200092, China)Abstract: Parameters research on Du-Chen power spectrum model based on the new seismic design code is carried out.Via nonlinear least squares method with Du-Chen model, the site soil damping ratio as well as superior angular frequency can be fitted out to satisfy power spectrum density function converted by the response spectrum curve in the new seismic design code. This method also can be applied to identify spectrum density parameter under frequent earthquake, medium earthquake and rare earthquake. The model parameters determined in the paper work in coordination with the site categorization in the new seismic design code, and it is easy to be used in practice.Keywords: the new seismic design code for buildings; Du-Chen power spectrum; power spectrum density function
