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首页> 外文期刊>International journal of geomechanics >Finite-Element Limit Analysis of Strip and Circular Skirted Footings on Sand
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Finite-Element Limit Analysis of Strip and Circular Skirted Footings on Sand

机译：沙滩上条形和圆形裙脚的有限元分析

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摘要

The lower- and upper-bound theorems of the limit analysis have been used in conjunction with finite elements and second-order cone programming (SOCP) for determining the bearing capacity of strip and circular skirted footings on sand. The analysis follows the Mohr-Coulomb's yield criterion and the associated flow rule; sand is not usually considered to obey this rule, but the results of using it are discussed. The friction angle of sand was varied between 30 and 45 degrees, and the depth (D-s) of the skirt increased from 0.25 to 2B; here B implies: (1) the width of a skirted strip footing, and (2) the diameter of a circular skirted footing. The results are expressed in terms of the bearing capacity ratio (BCR): the ratio of the bearing capacities of a skirted footing to that of the surface footing, with the same value of B but without any skirt element. The results reveal that the magnitude of the BCR increases quite extensively with an increase in the value of D-s/B. The skirted footing was found to be especially quite advantageous for loose sand. With the same D-s/B, the BCR for a circular skirted footing was found to be substantially greater than that for the strip skirted footing.
机译：极限分析的上下定理已与有限元和二阶圆锥规划（SOCP）结合使用，以确定带状和圆形裙基在沙滩上的承载力。分析遵循Mohr-Coulomb的屈服准则和相关的流量规则。通常不认为沙子遵守该规则，但是讨论了使用它的结果。沙子的摩擦角在30至45度之间变化，裙部的深度（D-s）从0.25增加到2B；这里的B表示：（1）带裙脚的条形基础的宽度，和（2）圆形裙脚的基础的直径。结果用承载力比（BCR）表示：踢脚基脚的承载力与表面脚基的承载力之比，具有相同的B值，但没有任何裙边元素。结果表明，随着D-s / B值的增加，BCR的幅度会大大增加。发现有裙带的立足点对于松散的沙子特别有利。对于相同的D-s / B，发现圆形裙脚的BCR明显大于带裙脚的BCR。

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