随机地震动态模型参数修正

摘要

我国新版《建筑抗震设计规范》GB 50011-2010对场地土动力参数做出了调整.参考国内学者已有的研究和随机振动理论对随机地震动模型参数进行修正.给出了我国东部地区随机地震动模型中的地震动持时,谱强度因子.并以框架结构的随机地震响应分析为例对比了不同场地条件下结构随机地震响应的最大均方根.参考概率统计中“3σ”准则给出了该框架结构随机地震响应的概率分布,并计算了结构在随机地震作用下的动力可靠度.%The soil dynamic parameters are modified in the latest code for seismic design of building(GB 50011-2010). On the base of domestic scholar's research and theories of random vibration, the random seismic model parameters are modified. The seismic duration, spectral intensity factor, and time envelopment parameter of the random seismic model are given. The random seismic model parameters of different venues soils, different groups, different seismic intensity are analysed. Finally, random seismic analysis of a frame structure is made, the max response root-mean-square in different soils and the response probability distribution of the structure are gotten, according to "3σ"rule in probability theory.