A STUDY ON FAILURE ENVELOPE AND RESIDUAL SETTLEMENT BASED ON HORIZONTAL RECIPROCAL LOADING TEST ON PIER MODEL OF SHALLOW FOUNDATION ON SAND

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  • 砂地盤上橋脚模型の水平交番載荷実験に基づく地震時における直接基礎の極限支持力および残留沈下量の評価方法の検討

Abstract

<p> Load eccentricity and inclination occur in shallow foundations via the combination of horizontal inertial force and vertical dead load during an earthquake. Although a decline in the ultimate bearing capacity under eccentric and inclined loads has been reported, the evaluation method used should be analyzed to determine whether it is applicable to cases involving earthquake loading. Moreover, the relationship between horizontal loading and vertical displacement has not been revealed; therefore, a quantitative evaluation method to determine the relationship must be developed and verified. In this study, we conduct a horizontal reciprocal loading test using a pier model of shallow foundation simulated based on the condition of earthquake loading. We considered a few methods for evaluating the ultimate bearing capacity and parameters which determine the relationship between horizontal loading and residual settlement.</p>

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