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首页> 外文期刊>Ships and offshore structures >The effects of slab geometries and wave directions on the steep wave-induced soil response and liquefaction around gravity-based offshore foundations
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The effects of slab geometries and wave directions on the steep wave-induced soil response and liquefaction around gravity-based offshore foundations

机译:板坯几何与波方向对陡峭波引起的土壤反应和基于重力的近岸基础液化的影响

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摘要

Gravity-based offshore foundations generally consist of a bottom slab and one or more cylindrical shafts on top of it. The slab geometry can strongly affect the surrounding flow pattern, dynamic wave pressure distribution and further momentary soil liquefaction. In the present study, the effects of the slab geometry and the incoming wave angle to the foundations on the surrounding soil response are investigated. Gravity-based foundations with bottom slabs of cylindrical shape and hexagonal prismatic shape are considered. For the hexagonal foundation, two different incoming wave angles, i.e. propagating to the hexagon corner and the edge, are simulated. The waves are fully nonlinear steep non-breaking waves. The wave-structure interaction is validated against an existing experiment. Soil consolidation behaviour underneath the foundations is investigated. It is found that both the slab geometry and the incoming wave angle can affect the distributions of pore pressure and momentary liquefaction depth in the surrounding soil.
机译:基于重力的近海基础通常由底板和一个或多个圆柱形轴组成。板坯几何体可以强烈影响周围的流动模式,动态波压分布和进一步的瞬间土壤液化。在本研究中,研究了板坯几何形状和输入波角对周围土壤反应的基础的影响。考虑基于重力的圆柱形和六边形棱柱形状的基础。对于六边形基础,模拟了两种不同的输入波角,即传播到六边形角和边缘。波是完全非线性陡峭的非破坏波。对现有实验验证了波浪结构相互作用。研究了基础下的土壤合并行为。发现板坯几何形状和输入波角可以影响周围土壤中孔隙压力和瞬时液化深度的分布。

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