VERIFICATION ANALYSIS ON DYNAMIC CENTRIFUGAL MODEL TEST OF AN ABUTMENT WITH EPS BACKFILL

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  • 背面にEPS盛土を有する橋台の動的遠心模型実験に対する検証解析

Abstract

According to a dynamic centrifugal model test of an abutment with EPS backfill, it has been reported a　large force caused by collision of slabs acts on the abutment during an earthquake. This report presents the results of a 3-dimensional FEM analysis to confirm this phenomenon and to evaluate the effect of the force on the abutment. As a result, it was confirmed: the force acting on the abutment by the slabs is generated when the inertial force is directed to the back of the abutment; the behavior is similar to that of the past test; the effect of the action on the abutment was greater due to the inertial force than the earth pressure; and replacing the slabs with EPS partly is effective in mitigating the force acting on the abutment.

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