摘要
利用工程地震动物理随机函数模型,对汶川地震实测数据进行了随机参数统计分析,给出了相应的地震动模型参数的概率分布。采用等分布序列选点方法对基本随机参数的概率空间进行剖分选出代表点集,并采用波群叠加方法生成了地震动时程样本集合,计算了反应谱样本集合。进而,比较了实测地震记录反应谱和反应谱样本集合的统计特征量,对地震动的物理随机函数模型进行了验证。
Based on a physical random function model of ground motion, the random physical parameters for Wenchuan Earthquake were analyzed and the probability density functions for these parameters were derived. A uniformly distributed sequences method was employed to select the representative point sets in the probability space of these random parameters and a superposition method is used to generate the samples of ground motions. Then, the response spectrums of these samples are calculated. By comparing statistical features of response spectra between the realistic ground motion records and the generated ground motion samples, the physical stochastic model of seismic ground motion is validated.
出处
《结构工程师》
北大核心
2015年第3期69-74,共6页
Structural Engineers
基金
国家自然科学基金(51278380)
关键词
随机函数模型
汶川地震
参数统计
反应谱
random function model, Wenchuan Earthquake, parametric statistic, response spectrum
