Combined loading of skirted foundations
Combined loading of skirted foundations
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DOI：
10.1680/geot.1998.48.5.637
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发表时间：
1998-10
期刊：
影响因子：
5.8
通讯作者：
M. F. Bransby;M. Randolph
中科院分区：
文献类型：
--
作者：
M. F. Bransby;M. Randolph
>假定土壤不排水，使用二维有限元分析和上限塑性分析研究了裙缘海上基础对垂直（V）、弯矩（M）和水平（H）组合荷载的响应。通过有限元分析，获得了关于屈服轨迹形状和屈服时土体变形机制的新信息。产量轨迹的形状与前人在V-M和V-H空间中预测的形状相似，但在M-H空间中差异显著。这种行为解释上限塑性机制建议的土壤变形机制计算的有限元分析。然后，这个程序是用来给一个很好的近似屈服轨迹的形状，从而可能形成未来的设计方法的基础。此外，还提出了一种基于塑性分析的屈服轨迹在H-M空间的简化变换，使屈服轨迹的数学表达式更为简单。
>The response of skirted offshore foundations to combined vertical (V), moment (M) and horizontal (H) loading has been studied using two-dimensional finite-element analysis and upper-bound plasticity analysis assuming the soil to be undrained. New information has been gained about the shape of the yield locus and the soil deformation mechanisms occurring at yield from the finite-element analysis. The shape of the yield locus was found to be similar to that predicted by previous workers in V—M and V— H space but differed significantly in M—H space. This behaviour is explained using upper-bound plasticity mechanisms suggested by the soil deformation mechanisms calculated in the finite element analysis. This procedure is then used to give a good approximation to the shape of the yield locus and thus may form the basis for future design methods. Additionally, a simplifying transformation is suggested for the yield locus in H—M space based on plasticity analysis, which allows use of simple mathematical express...