Effect of strength non-homogeneity on the shape of failure envelopes for combined loading of strip and circular foundations on clay
Effect of strength non-homogeneity on the shape of failure envelopes for combined loading of strip and circular foundations on clay
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DOI：
10.1680/geot.53.6.575.37328
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发表时间：
2003-08
期刊：
影响因子：
5.8
通讯作者：
S. Gourvenec;M. Randolph
中科院分区：
文献类型：
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作者：
S. Gourvenec;M. Randolph
粘土表面基础在纯竖向(V)、水平(H)或弯矩(M)荷载下的承载力可以通过使用适当的承载力系数以无量纲形式表示，其值将受到基础形状和不排水抗剪强度随深度的变化的影响。然后，一个常见的假设是，一旦缩放到适当的顶点，在三维加载空间（V， M， H）中，无论地基形状和土壤非均质性如何，完整的破坏包络线的形状将是相似的。通过对条形和圆形地基的二维和三维有限元分析，对剪切强度随深度线性变化的简单Tresca土模型，探讨了这一假设的适用性。考虑到涉及部分嵌入式基础的应用，例如近海围板基础，已假定完全吸力并与下面的土壤“结合”。这篇论文记录了正常的……
The capacity of surface foundations on clay under pure vertical (V), horizontal (H) or moment (M) loading may be expressed in non-dimensional form through the use of appropriate bearing capacity factors, with values that will be affected by the shape of the foundation and also any variation of undrained shear strength with depth. A common assumption has then been that the shape of the complete failure envelope in three-dimensional loading space (V, M, H) will be similar regardless of foundation shape and soil non-homogeneity, once scaled to the appropriate apex points. The appropriateness of this assumption has been explored by means of two- and three-dimensional finite element analyses of strip and circular footings, for a simple Tresca soil model where the shear strength varies linearly with depth. With a view to applications involving partially embedded foundations, such as offshore skirted foundations, full suction and ‘bonding’ with the underlying soil has been assumed. The paper documents the normal...