Modeling the Behavior of Geotechnical Constructions Under Cyclic Loading with a Numerical Approach Based on J. Lemaitre Model

摘要

ublishercopyright>? 2017, Indian Geotechnical Society.? 2017, Indian Geotechnical Society. A concise prediction of the cyclic accumulation of deformations in non-cohesive soils becomes important for a high number of cycles, but such prediction is troublesome because even small errors of the general purpose constitutive models are quickly accumulated. The solution could be an explicit model that treats accumulation as a sort of creep process. This article presents a numerical fashion the phenomenon of accumulation resulting from cyclic loading in sand in drained state. The first cycle is performed using Hypoplastic model of Wolffersdorff 1996 with the improvement of intergranular strain?(IGS). From the second cycle, the behavior of the soil is simulated as a pseudo creep (J. Lemaitre model) where we seek an equivalence between the parameters of J. Lemaitre model and cyclic parameters, Replacing the cyclic effect by a cumulative volumetric strain and the number of cycles (N) is considered equivalent time (t). The prediction of model is compared with experimental values. Good correlation exists between predicted and experimental response.A concise prediction of the cyclic accumulation of deformations in non-cohesive soils becomes important for a high number of cycles, but such prediction is troublesome because even small errors of the general purpose constitutive models are quickly accumulated. The solution could be an explicit model that treats accumulation as a sort of creep process. This article presents a numerical fashion the phenomenon of accumulation resulting from cyclic loading in sand in drained state. The first cycle is performed using Hypoplastic model of Wolffersdorff 1996 with the improvement of intergranular strain?(IGS). From the second cycle, the behavior of the soil is simulated as a pseudo creep (J. Lemaitre model) where we seek an equivalence between the parameters of J. Lemaitre model and cyclic parameters, Replacing the cyclic effect by a cumulative volumetric strain and the number of cycles (N) is considered equivalent time (t). The prediction of model is compared with experimental values. Good correlation exists between predicted and experimental response.