基于现行抗震规范的Kanai-Tajimi模型参数研究
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摘要
基于我国现行抗震规范(GB50011-2001)并利用随机极值原理对地震动随机模型Kanai Tajimi功率谱参数进行分析,提出为考虑土体的非线性特性,有必要区分多遇地震作用下和罕遇地震作用下的模型参数;给出了多遇地震作用下与规范相一致的场地土阻尼比和卓越频率,建立了谱强度因子S0与地面最大加速度的关系;对罕遇地震作用下的模型参数进行了初步探讨。
The parameters of Kanai-Tajimi model are studied based on the current seismic code(GB50011—2001)and the random extreme value theory in this paper. It is necessary to distinguish the model parameters under frequently occurred earthquake action from the ones under seldomly occurred earthquake action for considering the nonlinear characteristic of the site soil. The corresponding damping ratio and predominant frequency of the site soil under frequently occurred earthquake action are presented. The relation between power spectral factor S_(0) and the mean value of maximum ground acceleration is derived. The model parameters under seldomly occurred earthquake action are studied preliminarily.
引文
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