%0 Journal Article %T A COMPARATIVE NUMERICAL STUDY OF A GEOSYNTHETICREINFORCED SOIL WALL USING THREE DIFFERENT CONSTITUTIVE SOIL MODELS %J Iranian Journal of Science and Technology Transactions of Civil Engineering %I Shiraz University %Z 2228-6160 %D 2015 %\ 02/01/2015 %V 39 %N C1 %P 125-141 %! A COMPARATIVE NUMERICAL STUDY OF A GEOSYNTHETICREINFORCED SOIL WALL USING THREE DIFFERENT CONSTITUTIVE SOIL MODELS %K Soil constitutive models %K reinforced soil wall %K response prediction %K numerical analysis %K geosynthetic reinforcements %K soil dilatancy %R 10.22099/ijstc.2015.2761 %X In this paper, three different soil constitutive models for granular soils wereimplemented in the numerical simulation of a full-scale reinforced soil segmental wall in order topredict the wall response during construction. The soil constitutive models in the order ofcomplexity are: linear elastic-perfectly plastic Mohr-Coulomb, Duncan-Chang hyperbolic, and anonlinear elastic-plastic hardening model. The latter, which can be regarded as a modified versionof the Mohr-Coulomb model, captures the nonlinear stress-dependent soil response. The nonlinearmodel can consider soil dilative behavior. In this regard, it keeps the simplicity in the formulationtogether with the accuracy in the prediction of soil response. By comparing the results, in general,there is good and acceptable accordance between numerical simulations and field measurements. Itis seen that using a simple soil model can acceptably predict the performance of reinforced walls.However, the disadvantage relates to poorness in the prediction of wall facing displacement, whichis sensitive to proper consideration of deformation parameters in a soil model. The accuracy of theprediction can be augmented by adopting reasonable functions for elastic (stiffness) and plastic(dilatancy) parameters with respect to the stress condition within the soil backfill. %U https://ijstc.shirazu.ac.ir/article_2761_80cefdcd8fc825e65ec0a32d821761c1.pdf