【摘要】 作为场地条件之一的土层特性(土层结构、土动力参数)对地表地震动参数的影响研究是一项具有重要理论和工程应用意义的研究课题。选择汶川地震强震区典型的钻孔资料和强震记录,以北川县城地勘标准孔和安县塔水波为基础,运用土层等效线性化程序计算了140个工程场地计算剖面,定量分析了土层特性改变对反应谱αmax、Tg及地震影响系数差△α影响的特点及规律。更多还原

【Abstract】 The effect of soil layer characteristics(soil layer structure,dynamic parameters,etc),being one of the site conditions,on the seismic ground motion is a research subject that has both theoretical and application value.Based on typical drill hole data and strong motion records of Wenchuan earthquake meizoseismal area,the standard soil profiles of Beichuan County and Tashui strong motion record in Anxian County,and using the equivalent linearization program,this paper calculated 140 soil profiles of engineering sites,quantitatively analyzed the features and laws of influence of the soil layer characteristic change on αmax,Tg and △α(the difference between two α’s) that affect the engineering structure.更多还原