軟弱地盤中に根入れされた構造物基礎の地震応答に関する実験的研究

Abstract

This study deals with experiments on the response of a rigid structural foundationsurrounded by soft surface layers subjected to harmonic excitations. It is shown that theresonant frequency of the structural foundation-soft surface layer system is lower than thatof the structural foundation-hard surface layer system, and that the damping force of theformer is stronger than the latter.It becomes clear that in liquefied sand the dynamic behaviors correspond to each otherof the pore water pressure, the vibrational earthpressure acting on the model, and theamplitude of the deformation, the plastic deformation of the model.