AMPLITUDE RATIO EFFECT ON DYNAMIC CHARACTERISTICS OF REMOLDED SOFT CLAY UNDER TRAIN LOADS

摘要

A hollow cylinder apparatus was used to simulate the stress paths induced in traffic-affected ground. A series of undrained shear tests was carried out. The inflection points on generalized shear strain curves were used to establish a damage criterion, which distinguished different damage characteristics under different stress levels. Tests were carried out to elucidate the effect of different initial deviator stress on soil shear stiffness. The variation of shear modulus with vibration times under different dynamic stress ratios was analyzed. Stiffness degradation and plastic cumulative deformations of soil were analyzed for the case where the initial deviator stress was equal to zero. The prediction models models can be used to investigate stiffness degradation patterns and axial plastic cumulative deformation patterns.