软土层对被动桩弯曲影响的有限元分析

针对地面堆载下由于软土运动引起的被动桩的弯曲性状，运用ANSYS建立二维理想弹塑性有限元模型，计算分析弯矩的变化特点，重点讨论软土层的厚度、模量及泊松比对桩身弯矩的大小和分布的影响规律。结果表明:采用提高软土模量、减小软土厚度的处理措施可以有效改善被动桩的受弯特性；泊松比对桩身弯矩的影响很小。

FEM Analysis on Effect of Soft Soil Layer on Bending Behavior of Passive Pile

In relation to the bending behavior of passive pile caused by movement of soft soil under ground loading,a 2D ideal elastic-plastic finite element model is established with ANSYS to calculate and analyze the change characteristics of the bending moment to the extent that the law of the factors, such as depth, modulus and Poisson ratio of soft soil layer, affecting the magnitude and distribution of the moment is focused on. The result shows that, by enhancing the modulus and reducing the depth, the bending behavior of passive pile could be improved effectively, in addition, the effect of Poisson ratio on the moment is little.