Modeling the Effects of Short- and Long-Term Loading on Suction Caissons Using 2D- and 3D-Finite Elements Methods

摘要

In this paper a numerical study of the effects of the initial and the longterm loadings of suction caissons is presented. 2D and 3D simulations were done. The soil considered was a soft normally consolidated clay with a shear strength increasing with depth, corresponding to deep sea sediments. The clay was simulated in Plaxis* with a Mohr-Coulomb and a Soft-Soil model. A hyperbolic relationship was obtained for the load-displacement curves, which permitted the extrapolation of the 2D to 3D results. A comparison of the typical yield failure envelope is also presented. The dissipation of the initial excess pore pressure was studied.