摘要
对大量的震害资料调查研究发现,发震断层上覆土层中含有软硬土层时,对整个上覆土层的破裂过程及最终破坏状态有一定的影响.本文在研究发震断层上覆土层中含有软夹层的基础上,采用平面应变有限元法模拟了发震断层错动时,含有硬夹层的上覆土层的破裂过程.对其破裂过程及破裂状态进行了分析,并将其与以往的研究成果对比,可以看出硬夹层的存在对上覆土层的破裂过程和最终破裂状态影响较小,与有软夹层的情况相比,当硬夹层的厚度小于、等于5 m时,可以忽略上覆土层中硬夹层的存在.
Based on investigating and researching to many cases of earthquakes, we found it effected on the whole rupture process of the overlaying soil and its final rupture states that soft,hard interlayer existed in the overlaying soil. In this paper, we use the plain stain finite element method, simulate the rupture process of the overlaying soil with hard interlayer and analyze its failure states. Comparing the result with others, including single homogeneous soil layer and soil layer with soft interlayer, we can learn that： There is a smaller influence on the rupture failure of the overlaying soil with hard interlayer; when the thickness of the hard interlayer is less than 5 meters, its influence can be ignored.
出处
《河南科学》
2005年第6期874-876,共3页
Henan Science
基金
国家自然科学基金资助项目(50078049)
关键词
发震断层
硬夹层
上覆土层
平面应变有限元法
earthquake fault
hard interlayer
overlaying soil
plain strain finite element method
