NUMERICAL ANALYSIS FOR THE RESPONSE OF SKIRT CIRCULAR SHALLOW FOOTING RESYING ON SANDY SOIL UNDER VERTICAL LOADS

Abstract

In this paper, the static response of a circular skirt foundation resting on a sandy soil subjectedto pure vertical load was analyzed numerically using finite element software, PLAXIS 3D 2020.Linear elastic model was adopted to describe the behavior of the shallow concrete circularfoundation with (1m) diameter and (0.2 m) thick, as well as the soil underneath, with andwithout skirt.Different skirt's length to diameter ratios (L/D) (0.25, 0.5, 0.75, and 1.0), in addition to differentskirt thicknesses (0.1 m, 0.15 m, 0.2m) were anticipated.The results shown that, in dry sand, existence of skirts improves the foundation performanceeffectively by increasing its load carrying capacity particularly when the skirt (L/D) ratiobecome larger. However, the increase in the thickness of the skirt has marginal influence and itcan be neglected for design purposes.