【摘要】 针对已提出的基于概率烈度的地面加速度峰值分布的结构抗震可靠性分析方法,对地震动输入模型进行选择.采用了考虑地面运动开始、强震、衰减全过程的修正地震动模型,提出了计算离散性地面加速度对应的谱密度值的方法.分析谱密度值对场地条件以及地面峰值加速度变化的敏感性,为进一步进行结构随机地震响应分析和结构失效概率计算提供依据.更多还原

【Abstract】 The ground motion input model was been analyzed in this paper according to the structure seismic reliability analysis method.This method was put forward basing on the ground peak accele ration distribution which relates to seismic intensity probability.This article adopts the modified ground motion model which considered the whole process including the beginning,the strong earthquake and the attenuation process.The way to calculate spectral density value relevant to discrete ground accele ration is introduce in this paper.The sensitivities of the spectral density value to field condition and the ground peak acceleration changes was also discussed in this article.That is a basic work for the further stochastic seismic response analysis and the structural failure probability calculation.更多还原