汶川地震汉源县城震害分布与场地反应分析  

Study on earthquake disaster distribution and site response of Hanyuan abnormal intensity during the Wenchuan earthquake

作　　者：齐文浩[1] 王振清[2] 薄景山[3] 郑桐[1] QI Wenhao;WANG Zhenqing;BO Jingshan;ZHENG Tong(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,CEA,Harbin 150080,China;College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China;Earthquake Science Department,Institute of Disaster Prevention,Sanhe 065201,China)

机构地区：[1]中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 [2]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001 [3]防灾科技学院,河北三河065201

出　　处：《哈尔滨工程大学学报》2020年第3期383-389,共7页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2018YFC1504004);中国地震局工程力学研究所基本科研业务费专项资助项目(2019B10);国家自然科学基金项目(50978237).

摘　　要：为研究汶川地震中汉源县城高烈度异常区震害分布特点,本文利用等效线性化波动方法计算了震害严重区域5个控制性工程地质钻孔的地表加速度峰值及其加速度反应谱。结果表明:汶川地震时,5个钻孔的地表加速度峰值较大,地震烈度达到了Ⅷ度,且5个钻孔地表加速度反应谱都远超过了中震设防标准;背后山滑坡前缘堆积体上的3个钻孔地表加速度峰值相对较大,加速度反应谱超过了大震设防水准;而靠近流沙河和背后山的2个钻孔地表加速度峰值相对较小,加速度反应谱也基本达到了大震设防水准。汉源县城震害分布与场地地震反应关系密切。In order to explain earthquake disaster distribution of Hanyuan abnormal high intensity during the 2008 Wenchuan earthquake,five controlling boreholes in a seriously damaged area were calculated by an equivalent linearization wave method.The peak ground accelerations of the five boreholes were very large,reaching seismic degree VIII,and the acceleration response spectra all exceeded the seismic precautionary criterion of a middle earthquake;the peak ground accelerations of three boreholes located in accumulation body of the Beihoushan landslide were larger with an acceleration response spectra that exceeded the seismic precautionary criterion of large earthquake.The peak ground accelerations of the borehole near the Beihoushan Mountain and the borehole near Liusha River were smaller,with an acceleration response spectrum of the two boreholes nearly reaching the seismic precautionary criterion of large earthquake.The earthquake disaster distribution of Hanyuan was highly related to the seismic response of the Hanyuan sites.

关 键 词：汶川地震 汉源县 烈度异常 场地反应 加速度峰值 反应谱 震害分布 场地条件 

分 类 号：TU435[建筑科学—岩土工程]