Reliquefaction Assessment Studies on Saturated Sand Deposits under Repeated Acceleration Loading Using 1-g Shaking Table Experiments

In this paper, reliquefaction studies of saturated sand deposits prepared at 40% and 60% relative density were tested using a uni-axial shaking table at repeated incremental acceleration loading conditions. The repeated acceleration loading was selected similar to continuous earthquake and associated foreshock/aftershock shaking events observed in recent earthquakes. For experimental testing, sinusoidal acceleration of 0.1 g, 0.2 g, 0.3 g, and 0.4 g loading with 5 Hz frequency was selected and applied sequentially to the model ground after dissipation of generated excess pore water pressure from the previous loading. The generated excess pore water pressure, pore pressure ratio, liquefaction time, variation in soil density, soil displacement and foundation settlement were estimated. The reliquefaction potential of saturated sand bed subjected to repeated acceleration loading was reported.

Automated summary

In this study, reliquefaction of saturated sand deposits was experimentally investigated using a uni-axial shaking table under repeated incremental acceleration loading conditions. The reliquefaction potential of the saturated sand bed subjected to repeated acceleration loading was evaluated by measuring parameters such as excess pore water pressure, soil density variation, etc.