Experimental Behavior of Single Pile with Large Mass in Dry Medium Sand Under Centrifuge Shaking Table Test

Abstract

AbstractIn this study, a single pile centrifuge shaking table model tests was conducted. The foundation soil was dry medium sand with 50% relative density which was made of pouring method. In prototype, the pile diameter was 1.0 m, and a mass of 312.5 ton was fixed on pile head which was 5 m above the ground surface. The strain gauges were uniformly instrumented along the pile to measure the bending moment response of the pile, the accelerometers were instrumented to obtain the acceleration response of soil and pile. The input seismic excitation was the sinusoidal wave of 0.3 g. The results show that: the obvious acceleration amplification effect was observed in the soil above 15 m; the maximum bending moment of pile occurred in 1.65 m depth, and the residual bending moment in the lower part of the pile was observed.KeywordsCentrifuge testSoil-pile interactionAcceleration amplification effect