【摘要】 采用多阶振型和有限差分联立的混合法，依据北京西集一郎府地区的地质条件，模拟了１９７６年唐山地震所引起的该区的剪切波运动；计算了工程上常用的峰值加速度和总能量．在夏垫断裂两侧的最大振幅和总能量的差异分别为２００％和７００％，研究结果可以解释唐山地震时西集一郎府一带所观测到的异常烈度．更多还原

【Abstract】 In this paper a hybrid method, based on mode summation and finitedifferences, is used to simulate the ground inchon of SH wave in the Xiji-Langfuarea of Beijing induced by the 1976 Tangshan earthquake. We eshmate the maximumacceleration amplitude and total energy of ground inchon for engineering purposes. Onthe two sides of the Xiadian fault the maximum acceleration amplitude and totalenergy can vary by afactor of 200% and 700% respectively. Our results can explainthe observed anomalous intensity in the Xiji-Langfu area induced by the 1976Tangshan earthquake.更多还原