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有限元模拟弹性位错的等效体力方法

DOI: 10.6038/cjg20150518, PP. 1666-1674

Keywords: 不连续有限元,地震位错,同震库仑应力,Tohoku-Oki地震,华北

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Abstract:

计算地震位错造成的位移场和应力场,对于估计大地震引起的后续地震活动发展趋势十分重要.本文提出在弹性位错问题的有限元模拟中,用等效体力代替位错源,从而在构建几何模型时不用包含断层,却可以处理包含任意复杂断层的问题,极大降低建模的难度.使用此方法,本文计算并讨论了在球形地球模型下2011年日本Tohoku-Oki特大地震对华北地区断层的影响,结果表明此次地震使华北主要断层趋于稳定.

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