Analysis of the Contractive Behavior of Soil Deposits Subjected to Biaxial Excitation

摘要

This paper presents the analysis of the contractive behavior of saturated sand deposits subjected to biaxial seismic excitation. The analysis is performed on reduced scale centrifuge models of soil deposits. The models were instrumented with dense arrays of accelerometers and pore pressure transducers in order to capture the soil response under seismic excitation. Shear stresses and shear strains are estimated based on the recorded accelerations. A multi-yield surface constitutive model is used to infer the shear-volume behavior of the soil based on the acceleration and pore pressure response. The analysis offers insight into the coupled two-directional response of soil deposits.