Acceleration generation due to strain localization of saturated clay specimen based on dynamic soil–water coupled finite deformation analysis

摘要: Abstract In the conventional bifurcation and strain localization analyses of geomaterials, inertia forces are generally ignored, based on quasi-static equilibrium equation. Even though a great deal literature exists dynamic analyses, information acceleration generation during formation shear bands has not been emphasized. Inspired by acoustic emission phenomenon in laboratory tests seismic related to slippage faults, soil–water coupled analysis is performed present paper saturated rectangular clay specimen subjected constant cell pressure under plane conditions, employing SYS Cam–clay model as elasto-plastic constitutive for soil skeleton. An initial geometrical imperfection was introduced trigger one single band, following results were found: (1) Two types oscillation occurred within when compression deformation at rate, namely, (a) caused sudden external (b) second induced localization/a band. With occurrence if, example, vertical rate equivalent about 10 cm/s, accelerations that order several thousand gal, which similar those measured earthquakes; (2) The effects time increment, mesh division, confining pressure, OCR stress-control loading generated investigated detail. It found stress control, even band displacement behaved quite differently.