论文部分内容阅读
为揭示倾斜受压荷载作用下斜桩的受力特性,基于非关联流动Mohr-Coulomb准则的弹塑性本构关系,建立三维弹塑性有限元模型,分析了倾斜荷载作用下荷载倾角和桩身倾角对斜桩受力特性的影响。结果表明:当荷载倾角较小时,倾斜荷载作用下的斜桩刚度同时取决于轴向与水平向刚度,二者刚度存在一个平衡,导致斜桩刚度并非在轴向受力时达到最大;斜桩极限抗压承载力随着荷载倾斜角度呈现M型,桩身极限抗压承载力峰值并非出现在轴向受力时,而出现在荷载倾斜小角度附近;正向倾斜荷载作用下,桩的刚度和承载力均随桩身倾角的增大而增大,在负向倾斜荷载作用下,其结果却相反;不同倾角斜桩的极限荷载受桩—土摩擦系数影响较大。
In order to reveal the stress behavior of inclined piles under inclined compression load, a three-dimensional elasto-plastic finite element model is established based on the elasto-plastic constitutive relationship of non-associated flow Mohr-Coulomb criterion. The relationship between load dip and pile inclination Effect on Stress Characteristics of Inclined Pile. The results show that when the inclination of load is small, the stiffness of inclined piles under the inclined load depends on the axial and horizontal stiffness at the same time, and the stiffness of the inclined piles has a balance. As a result, the rigidity of inclined piles does not reach the maximum under axial load. The ultimate compressive load carrying capacity is M-type with the load angle. The peak ultimate compressive load carrying capacity of the pile does not appear when the axial load is applied, but appears at a small angle of load inclination. Under the condition of positive slope load, And the bearing capacity increase with the increase of the pile inclination, but the result is opposite under the negative inclined load. The ultimate load of inclined piles with different inclination is greatly influenced by the pile-soil friction coefficient.