Abstract
This study attempted to evaluate the uplift resistance of belled anchor with dense sand, by comparing the results of experiment with finite element analysis. The test was conducted in normal gravity condition and was performed under axisymmetric condition in embedment ratio (h/D; h: depth of sand mass, D: Anchor diameter) of two. The circular belled anchor was 5cm in diameter and belled angles with 0, 27, 45, 63, 72 and 81 degrees. The finite element analysis employed a constitutive model in which nonassociated strain hardening-softening elasto-plastic material was assumed and an effect of shear band thickness was introduced. Fromthe study, when the belled angle was from 60 to 70 degrees, the maximum uplift resistance was the largest in all belled anchors. The difference of maximum uplift resistance was attributed to the different extent of the progressive failure with shear band propagation in sand mass and friction on the surface of anchor.
