The bearing capacity of a strip footing on clay under combined loading
The bearing capacity of a strip footing on clay under combined loading
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DOI：
10.1098/rspa.1999.0340
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发表时间：
1999-03
期刊：
影响因子：
--
通讯作者：
G. Houlsby;A. Puzrin
中科院分区：
文献类型：
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作者：
G. Houlsby;A. Puzrin
在本文中，我们寻求封闭形式的解决方案，在不排水粘土上的条形基础受到组合的垂直，力矩和水平荷载的破坏问题。这项研究的动机来自海上石油和天然气行业，在那里了解一般负载下的基础问题是很重要的。地基和粘土之间的接触无法承受张力，这一问题的特点使解决方案变得相当复杂。结果表明，塑性理论的边界定理不足以解决问题，只有采用某些进一步的假设才能找到解决办法。虽然不能证明精确解的存在性，但得到了一个合理解的明显上界和下界。为了得到这些解决方案，引入了一个新的缩放程序，它起着同样的作用，上限的有效宽度方法下限的基础倒塌荷载。
In this paper we seek closed-form solutions for the problem of failure of a strip foundation on undrained clay subjected to combined vertical, moment and horizontal loading. The motivation for the study comes from the offshore oil and gas industry, where the understanding of problems of foundations under general loading is important. The contact between the foundation and the clay is unable to sustain tension, and this feature of the problem considerably complicates the solution. It is found that the bound theorems of plasticity theory are insufficient to solve the problem, and a solution can only be found by adopting certain further hypotheses. Although the existence of an exact solution cannot be proven, apparent upper and lower bounds to a plausible solution are obtained. In order to derive these solutions, a new scaling procedure is introduced, which plays the same role for upper bounds as does the effective width method for lower-bound footing collapse loads.