DEFORMATION ANALYSIS OF LIQUEFIED GROUND AROUND UNDERGROUND STRUCTURE POST ACTION OF SEISMIC MOTION

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  • 地下構造物周辺の液状化地盤を対象とした地震動作用後の変形解析

Abstract

<p> Local subsidence damage on the airport taxiway right over the ground nearby the underground structure occurred during the 2011 off the Pacific coast of Tohoku Earthquake. The authors have clarified the relationship between accumulated shear strain in the ground and the amount of local subsidence of ground surface caused by the dynamic interaction between the ground and the underground structure from the results of shake table tests of a large model in 1g gravitational field in which an underground structure model was installed in a sandy ground. It was confirmed that seismic response analysis can reproduce the strain histories of the ground around the underground structure obtained from shake table test. In this study, a deformation analysis method for evaluating ground surface subsidence associated with dissipation of excess pore water pressure post action of seismic motion is discussed.</p>

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