DAMAGE ASSESSMENT METHOD OF UNDERGROUND CULVERTS SUBJECT TO FAULT DISPLACEMENT AND SEISMIC SHAKING

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  • 断層変位と地震の重畳現象に対する地中カルバートの損傷評価手法

Abstract

<p> The recent seismic design on box culverts significantly concerns the superposition of fault displacement and seismic shaking. We conducted the three-dimensional finite element analysis of the superposition by focusing on the weak axis of the box culvert and the direction of seismic motion. As a result, the damage distribution over the box culverts was quantitatively evaluated using the safety factor based on the yield strength curve newly developed in this study and was clearly dependent on the seismic direction. It was also confirmed that the response seismic intensity method for the superposition can be applied to the damage evaluation by comparing the damage distribution obtained from time history analysis using the same finite element model. Furthermore, the applicability of dynamic analysis was examined.</p>

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