北川县城土层特性对地震动的影响  

Influence of characteristics of soil layer in Beichuan County town on seismic ground motion

作　　者：张建毅[1,2] 薄景山[1,2] 林玮[1] 蔡晓光[1,2] 赵培培[1,2] 

机构地区：[1]防灾科技学院,河北三河065201 [2]辛国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080

出　　处：《自然灾害学报》2013年第1期130-139,共10页Journal of Natural Disasters

基　　金：中国地震局教师科研基金项目(20090129);地震行业科研专项(201008006)

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。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 Xmax Tg and△x（ the difference between two x＇s） that affect the engineering structure.

关 键 词：土层特性 地震动 反应谱特征 北川县城 

分 类 号：TU392.1[建筑科学—结构工程] P315.97[天文地球—地震学]