Abstract

The bearing capacity of shallow foundations on rocks under inclined and eccentric loads is investigated using the kinematic approach of limit analysis theory. The study focuses on evaluating the reduction of bearing capacity induced by the eccentricity and the inclination of the load with respect to the vertical direction. The generalized Hoek and Brown criterion is adopted to describe the strength properties of the rock. A failure mechanism is used to implement the kinematic approach of limit analysis. This study provides an upper bound of the bearing capacity of the strip footing. Comparisons were made between the results of this approach and those obtained using finite element limit analysis. These comparisons confirm the accuracy of the proposed approach. Finally, a parametric study was carried out, which evaluated the effects of geometric, strength and loading parameters on the bearing capacity of the strip footing.

摘要

采用极限分析理论的运动学方法研究了倾斜和偏心荷载作用下岩石上浅地基的承载力。该研究的重点是评估由偏心和载荷相对于垂直方向的倾斜引起的承载能力降低。采用广义 Hoek 和 Brown 准则来描述岩石的强度特性。失效机制用于实现极限分析的运动学方法。本研究提供了条形基础承载能力的上限。将这种方法的结果与使用有限元极限分析获得的结果进行了比较。这些比较证实了所提出方法的准确性。最后，进行了参数研究，评估了几何、