摘要
运用动接触单元对断层场地中的非发震断层的实际运动状态进行了模拟,并结合有限元模型分析了断层场地中非发震断层对场地地震动的影响。通过计算和比较无摩擦力、有摩擦力和无断层三种工况,探讨了动接触单元模拟非发震断层的合理性。计算中还考虑了断层破碎带及断层破碎带土的一些性质,结果表明考虑断层破碎带的存在对于地震动是有影响的。同时还指出,在研究实际非发震断层对场地地震动影响时,应具体考虑场地诸因素的复杂性。
We use dynamic contact element to simulate the actual motion of the non-active fault, and analyze the effect of non-causative fault on ground motion in the fault site combining with finite element model. Through computing and comparing such three ground conditions as non-fault-friction, fault-friction and non-fault, we discuss the rationality to simulating non-causative fault with dynamic contact element. The fault fracture zone and some of its soil characters are taken into consideration in the calculation. The result shows that the fracture zone does have influence on ground motion. Meanwhile, it indicates that the complexity of related site factors should be considered comprehensively in practical study.
出处
《地震研究》
CSCD
北大核心
2005年第2期162-166,共5页
Journal of Seismological Research
基金
国家自然科学基金(50378071)资助课题.
关键词
非发震断层
断层破碎带
动接触单元
有限元
地震动
non-causative fault, fault fracture zone, dynamic contact element, finite element, ground motion
