岩土力学2011，Vol.32Issue(8)：2441-2445,2478,6.
考虑土体屈服的纵横荷载单桩变形内力分析
Analysis of deformation and internal force for single pile under combined vertical and lateral loads considering yielding of soil
摘要
Abstract
In order to improve the design and calculation of single piles under combined vertical and lateral loads when the pile deformation is comparatively great, considering the P-△ effect (with the meaning of vertical load can magnify the deformation induced by lateral load) caused by vertical load and yield of soil, dead weight of the pile, and skin friction of the pile side, assuming that the coefficient of subgrade reaction increases linearly with depth, the power series solutions of the deformation and internal force for the pile shaft under ground surface are obtained. Combining the pre-existing power series solutions for the pile shaft above ground, the relevant computer program is developed by Fortran language. The calculation results indicate that the displacements at the pile head and the ground surface, and the maximum bending moment increase when the vertical and lateral loads, and the pile length above ground increase; and decrease when the yield displacement of soil increases. The vertical load may cause the instability problem for the pile. The boundary condition at the pile head plays an important role in pile responses. The computed and the model test results are in good agreement, meaning that the obtained solutions and program are dependable.关键词
桩-土相互作用/纵横荷载/屈服/弯矩/幂级数解Key words
pile-soil interaction/ combined vertical and lateral loads/ yielding/ bending moment/ power series solution分类
建筑与水利引用本文复制引用
张磊,龚晓南,俞建霖..考虑土体屈服的纵横荷载单桩变形内力分析[J].岩土力学,2011,32(8):2441-2445,2478,6.基金项目
国家自然科学基金资助项目(No.50708093). （No.50708093）
