The Numerical Simulation of Geosynthetics-Reinforced Soil Structures Using Elasto-Plastic Dilatancy Models

Geotechnical Predictions and Practice in Dealing with Geohazards

“…The reinforcement effect produced by the use of geosynthetics is not a simple aggregate of the rigidity and strength of both geosynthetics and compacted soil. Assuming that the dynamic interactions between geosynthetics and compacted soil are the effects arising from geosynthetics restraining the dilatancy of compacted soil under shear, the authors conducted finite-element simulations of full-scale field tests (Hirata et al 1999) and model tests (Iizuka et al 2001). Consequently, the effect of geosynthetics-reinforcement is generally higher than expected and therefore quite reliable when used against earthquakes and other geohazards.…”

Numerical Simulation of Soil Structures Reinforced by Geosynthetics

“…The conventional method proposed by Drucker (1950) to determine loading on elasto-plastic bodies, however, fails to draw a distinction between loading and unloading in the strain softening region. In our study, loading was determined for strain softening by applying to the SO model the determination method employed by Asaoka et al (1994) for the Cam clay model (Hirata et al 1999). The method is outlined as follows.…”

“…Their field tests revealed that geosynthetics and compacted soil behave as an integrated body. Assuming that the dynamic interactions between geosynthetics and compacted soil are the effects arising from geosynthetics restraining the dilatancy of compacted soil under shear, the authors conducted finite-element simulations of full-scale field tests (Hirata et al 1999) and model tests (Iizuka et al 2001). This chapter presents elasto-plastic constitutive models with the dilatancy of compacted soil under shear taken into consideration and an estimation method for constitutive properties of compacted soil.…”