水平荷载-扭矩耦合作用下斜桩承载变形特性数值模拟

利用ABAQUS数值软件分析了斜桩在水平荷载 H 和扭矩 T 耦合作用下的承载特性、桩身内力以及桩-土界面上的摩阻力等变化特征并与直桩进行了对比,探讨了桩-土刚度比、荷载偏心距和桩身长径比对斜桩受扭承载力的影响。分析结果表明:斜桩在水平荷载与扭矩耦合作用下,桩身为受扭破坏；斜桩的受扭承载力大于直桩,斜桩受扭承载力的大小与桩身倾角相关；桩-土刚度比、荷载偏心距和桩身长径比对斜桩受扭承载力也有一定的影响,而桩身长径比的影响较大。

Numerical simulation of bearing and deformation behavior of batter piles under combined horizontal load and torque

The ABAQUS numerical software was used to analyze the bearing characteristics of batter piles under the coupling of horizontal load H and torque T , the variation characteristics of pile internal force and the friction on pile-soil interface. The changes in characteristics of batter piles were also compared to those of straight piles. The impact of pile-soil stiffness ratio, eccentricity of loading and length diameter ratio of the pile shaft on the torsional bearing capacity of batter piles was discussed. The results indicate that when subjected to the coupling the horizontal load and torque, batter pile is torsionally damaged. The torsional bearing capacity of batter piles is greater than that of straight piles. The torsional bearing capacity of batter piles is related to the inclination angle of the pile body. The pile-soil stiffness ratio, eccentricity of loading and length diameter ratio of the pile shaft also have a certain impact on the torsional bearing capacity of batter piles, and the length diameter ratio of the pile shaft has a greater impact.