FIXITY DEPTH OF OFFSHORE PILES IN ELASTOPLASTIC SOFT CLAY UNDER DYNAMIC LOAD

Anis Mohamad Ali, Mohammad J.K. Essa, Abdulameer Qasim Hassan

Abstract: This work represents study of dynamic behavior of offshore piles embedded in elastoplastic soft clay, and estimating the fixity depth of pile. ABAQUS finite element program which used to simulate the problem. The soil was modeled in two case elastic state model and elastoplastic state model represented by cam-clay model, three dimension element used to represent the interaction between pile and soil, and laboratory tests used to getting the real properties of clayey soil and to descried interface. The results obtained developed two empirical equations used to calculate depth of pile fixity for pile embedded in elastic and elastoplastic soil respectively. Also, show the depth of pile fixity is increase about (40 %) due to change soil model from elastic to plastic, when pile embedded in elastoplastic soil its dependent on soil strength, interface properties and pile rigidity. The pile head displacement is increase about 90 % while the bending moment is decease 10 % at pile head.

Keywords: ELASTOPLASTIC

DOI: https://doi.org/10.15623/ijret.2016.0508041