介质横向不均匀对震后地表位移场的影响

STUDY ON POST-SEISMIC DISPLACEMENT AFFECTED BY LATERALLY INHOMOGENEOUS MEDIUM

利用三维有限元模拟两层地球模型 (包括弹性层和粘弹性层 )介质的横向不均匀和断层错动的复杂性对震后地表位移场的影响 ,其数值结果包括弹性解和粘弹性解。结果表明 ,震后位移场的分布特征不仅与粘弹性层的流变特性有关 ,还与弹性层介质的剪切模量以及断层的同震错动有关。

By three dimensional finit element method this paper focuses on the simulation of effects of the post-seismic displacement by laterally inhomogeneous medium (including elastic and visco-elastic) and complex fault dislocation.The numerical results including elastic and visco-elastic solution show that the distribution of the post-seismic displacement is not only related to the rheology of the visco-elastic layer,but also to the shear modulus of the elastic layer and the coseismic fault dislocation.