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Capacity assessment of offshore skirted foundations under HM combined loading using RFEM

机译：使用RFEM的HM组合载荷下海上裙式基础的承载力评估

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摘要

Skirted foundations are widely used in offshore applications to resist the large vertical-horizontal-moment (VHM) loads likely to occur in deep water. Their ultimate capacity under combined loading is usually based on VHM failure envelopes commonly constructed using numerical methods but ignoring the spatial variability of seabed soils. This paper investigates the influence of spatial variability of undrained soil shear strength and the embedment ratio on the capacity of skirted foundations under HM combined loading. For this, a random finite element method (RFEM) was employed to identify the probabilistic HM failure envelopes of skirted foundations. A sensitivity analysis of the stochastic bearing capacity and failure envelopes to the soil spatial correlation has highlighted the significant effect of vertical scale of fluctuation on the skirted foundation response, mainly for low values.
机译：裙式地基广泛用于海上应用中，以抵抗深水中可能发生的巨大的垂直水平矩（VHM）载荷。它们在组合载荷下的极限承载力通常基于通常使用数值方法构造的VHM破坏包络，但忽略了海床土壤的空间变异性。本文研究了不排水土的抗剪强度和埋入比的空间变异性对HM组合荷载下裙式地基承载力的影响。为此，采用随机有限元方法（RFEM）来确定裙式基础的概率HM破坏包络线。对随机承载力和破坏包络线对土壤空间相关性的敏感性分析突出了垂直尺度的波动对裙式基础响应的重大影响，主要是针对低值。

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