摘要
综合分析延庆—怀来盆地地震危险性,确定潜在发震断裂为延矾盆地北缘断裂的屈家窑—方家冲段,震级为7.0级。基于延庆—怀来盆地含地表厚沉积层的三维结构模型,设置两种破裂模式进行设定地震的地震动模拟研究盆地结构对地震动的放大效应,发现盆地浅层的沉积结构对较短周期段的地震动影响更为显著,较大的放大系数通常对应着较大的第四系厚度,最大放大系数位于延庆盆地。
Based on comprehensively analyse on the seismic risk of Yanqing-Huailai basin,the potential seismogenic fault is Qujiayao-Fangjiachong segment of the northern margin fault of Yanqing-Fanshan basin is determined,with a probable magnitude of 7.0.Based on the 3D structural model of Yanqing-Huailai basin with thick surface sediments,two rupture modes are set to simulate the ground motion of the scenario earthquake for studying the amplification effect of the basin structure.It is found that the shallow sedimentary structure of the basin has a more significant impact on the ground motion in the shorter period.The larger amplification factor usually corresponds to the larger quaternary thickness,and the maximum amplification factor is located in Yanqing Basin.
作者
王晓山
付长华
赵志远
冯向东
WANG Xiaoshan;FU Changhua;ZHAO Zhiyuan;FENG Xiangdong(Hebei Earthquake Agency,Shijiazhuang 050021,China;Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)
出处
《灾害学》
CSCD
北大核心
2023年第2期53-59,共7页
Journal of Catastrophology
基金
中国地震局地震科技星火计划项目(XH20006Y)
中央级公益性科研院所基本科研业务专项(DQJB22Z01-11)
河北省科技计划(19975412D)。
关键词
延庆—怀来盆地
地震危险性
地震动模拟
盆地效应
Yanqing-huailai basin
seismic risk analysis
ground motion simulation
basin effect
