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monopile responses to monotonic and cyclic loading in undrained sand using 3D FE with SANISAND-MSu

Water Science and Engineering 2022年第1期15卷 69-77页

作者： Hao-yuan Liu Amir M.Kaynia Norwegian Geotechnical Institute Oslo 0806Norway Norwegian University of Science and Technology Trondheim 7491Norway Norconsult Sandvika 1338Norway

monopile response under undrained conditions in sand is gaining increasing interests owing to the recent development of offshore wind farms in seismic *** pressure evolution in liquefiable soil can significantly reduce the strength and stiffness of the soil which in turn affects the structural dynamic *** numerical models have been developed in the last two decades to enhance understanding of the mechanism of monopile-soil interaction with the existence of pore water *** this study,the effects of geometry and static vertical load on monopile lateral response were studied using three-dimensional finite element methods that consider the existence of lateral cyclic load-induced pore water *** achieve reliable simulation results of pore pressure development and pile displacement accumulation during cyclic loading,the simple anisotropic sand model with memory surface for undrained cyclic behavior of sand was *** piles with the same diameter,a accumulated pile head displacement during lateral cyclic loading decreased linearly with increasing pile embedded length but increased with increasing *** vertical load had minor effects on pile cyclic lateral *** distributions of mean effective stress and pore water pressure in the soil domain were *** pile reaction curve(cyclic soil reaction against pile defection)of the monopile was *** numerical results aim to provide reference for optimized engineering design procedures.

关键词： offshore monopile Pore pressure Cyclic loading Soil-structure interaction Sand

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