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本文导出拉梅常数不相等情形的半无限弹性介质中任意倾角的矩形断层错动产生的应力场的解析表达式.给出走向滑动和倾向滑动的倾斜断层的应力场在地表面的等值线图.讨论了介质的泊松比、断层面的倾角、上界和下界对地面的应力场的影响.作为一种应用,计算了通海地震、海城地震和唐山地震断层近场的剪应力和流体静应力的等值线图,并同这三个地震的强余震的空间分布作比较,发现大多数强余震分布在流体静应力为正值的引张区内.
In this paper, the analytical expression of the stress field generated by the arbitrary fault rectangular fault in half-infinite elastic medium with different Lame’s constant is deduced.The contour of the stress field at the sloping fault in strike-slip and dip-slip The effects of medium Poisson’s ratio, dip of fault plane, upper bound and lower bound on ground stress field are discussed.As an application, the shear stress in the near-field of the Tonghai earthquake, the Haicheng earthquake and the Tangshan earthquake are calculated The contour map of hydrostatic stress is compared with the spatial distribution of the strong aftershocks of the three earthquakes and it is found that most of the strong aftershocks are distributed in the extended zone where the hydrostatic stress is positive.