摘要
采用平面应变有限元法,研究了地震断层错动时有软夹层的基岩上覆土层的破裂特征.结果表明,软夹层使上覆土层破裂分为两个阶段.软夹层埋置深浅的不同使上覆土层的破裂过程和破裂范围表现出一定的差异.埋置较深的软夹层使地表产生较大的破坏.软夹层的厚薄对上覆土层的破裂进程和破裂范围也有影响.
In this paper, the rupture characteristics of the overlaying soil with soft interlayer were studied by plane-strain finite element method. From the results, it can be shown that the existence of soft layer separates rupture process of the overlaying soil into two phases. The depth of a buried soft interlayer will influence the rupture process and the rupture range of the overlaying soil. The deeply buried soft interlayer would bring about a wider range of surface failure. In addition, the thickness of the soft layer also has effect on the rupture process and rupture range of the overlaying soil.
出处
《地震学报》
CSCD
北大核心
2006年第5期523-528,共6页
Acta Seismologica Sinica
基金
国家自然科学基金项目(50078049)资助.
关键词
地震断层
软夹层
上覆土层
有限元方法
fault
soft interlayer
overlaying soil
finite element method
