摘要
团树断层场地在多次地震中出现了烈度异常。为了弄清烈度异常的原因,应用显式有限元方法,数值模拟了在脉冲地震波斜入射情形下断层场地的地震反应。结果表明:在基岩山脚附近土层场地地震动放大比基岩山区平均高4倍、比远离基岩山脚土层场地平均高2倍,与历史震害分布有较好的对应。
Intensity anomalies occurred at Tuanshu fault site in the past several earthquakes. In order to find out the reasons, the numerical simulation of seismic responses of this fault site subjected to inclined P and SV pulse wave is performed. These calculations predict that the ground motion amplitude at soil site near a rock mountain is 4 times than that at rock mountains, and the amplitude at soil site away from a rock mountain is 2 times than that at rock mountains. This is corresponding to the distributions of past earthquake damage.
出处
《地震工程与工程振动》
CSCD
北大核心
2003年第4期17-21,共5页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金资助项目(50178065)
地震科学联合基金资助课题(101062)
