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首页> 外文期刊>Canadian Geotechnical Journal >Effect of footing width on N-gamma and failure envelope of eccentrically and obliquely loaded strip footings on sand
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Effect of footing width on N-gamma and failure envelope of eccentrically and obliquely loaded strip footings on sand

机译：基础宽度对砂土偏心和斜载条形基础的N伽玛和破坏包络的影响

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摘要

This paper thoroughly investigates the bearing capacity of strip footings on sand under combined loading by using a lower-bound limit analysis in conjunction with finite elements and second-order cone programming (SOCP). Two analyses were performed: one using a constant friction angle and the other using a variable friction angle. The analyses with a constant friction angle were used to calibrate the existing results, including the classical solutions commonly used in foundation design practice and other numerical or experimental solutions. The analyses with a variable friction angle allow us to investigate the effect of footing width B on the bearing capacity of strip footings. An iteration computational procedure is employed to account for the dependency of the friction angle on the stress level. According to the numerical results, it is found that the bearing capacity factor N-gamma for eccentrically or obliquely loaded strip footings linearly decreases with the increase of B on a log-log scale, where the range 0.3-5mof footing width was considered in this paper. In addition, it is found that the footing width has a negligible effect on the shape and size of the normalized failure envelopes.
机译：本文通过结合有限元和二阶锥规划（SOCP）的下限分析，全面研究了带状地基在组合荷载下的承载力。进行了两种分析：一种使用恒定的摩擦角，另一种使用可变的摩擦角。使用具有恒定摩擦角的分析来校准现有结果，包括基础设计实践中常用的经典解决方案以及其他数值或实验解决方案。具有可变摩擦角的分析使我们能够研究基础宽度B对带状基础的承载力的影响。采用迭代计算程序来考虑摩擦角对应力水平的依赖性。根据数值结果发现，偏心或斜载条形基础的承载力因子N-γ随B值的增加以对数-对数刻度线性减小，其中考虑基础宽度为0.3-5m纸。另外，发现立足宽度对归一化失效包络线的形状和尺寸的影响可忽略不计。

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