NUMERICAL INVESTIGATION OF STRESS DIP IN EMBANKMENTS USING ELASTIC MODEL BASED ON ISOGEOMETRIC ANALYSIS METHOD

Abstract

The local minimum pressure in embankment initiated by the base deflection is revisited by an elastic model; whereby, the effect of elastic input parameters such as Young's modulus, Poisson's ratio, and basal roughness conditions on the pronounced local minimum pressure is also disclosed by mean of the elastic model. On the other hand, the characteristic of stress dip from the elastic solution was evaluated by comparing with that of an elasto-plastic solution. Finally, the effect of the geometric features such as the height of the embankment as well as the inclination angle of the slope on the pronounced local minimum pressure was also considered. The method of IsoGemetric Analysis (IGA) was implemented for discretizing the spatial domain instead of Finite Element Method; therefore, the superiority of IGA over FEM in terms of computational cost was also demonstrated.