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ON THE HORIZONTAL STRAIN ANALYSIS OF THE SUBSIDENCE PHENOMENON BY A HYBRIDIZED BOUNDARY ELEMENT/FINITE DIFFERENCE METHOD
Abstract
Analysis of the horizontal strains of the ground subsidence due to underground excavation in rock can be accomplished by a hybridized higher order indirect boundary element/ finite difference (BE/FD) formulation. The higher order displacement discontinuity field is obtai ned by using the quadratic displacement discontinuity elements (i.e each higher order element is divided into three sub-elements bearing a quadratic variation of displ acement discontinuities). Then th e classic finite difference formulation (i.e. the backward, central and forward finite difference formulations) is used to obtain the nodal horizontal strain s along the elements. A classical example problem is used to verify the applicab ility of the proposed me thod. The numerical results are given in the related Tables and Figures showing the effectiveness and validness of the proposed method.
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