人工灌注桩内力和变形分析的微分方程解法

本文根据上部结构在竖向荷载和水平地震荷载组合后直接传给桩端的弯矩、剪力和轴力,对在这三种桩端外力作用下柱与地基土共同工作的内力和变形进行分析,求得桩身内力和变形的解析解。指出了现行设计计算方法存在的问题和不足。特别是对桩的计算简图选取、系数K和计算宽度B取值的讨论以及经详细的解析分析后得到的桩身内力和变形,为桩的强度设计提供了比较可靠的理论依据,避免了现行设计配筋的盲目性。

Differential-equation Method for Internal Force and Deformation Analysis of Artificial Pouring Piles

An analytical solution of internal force and deformation in the pile body is obtained and presented in this paper by analysing the internal force and deformation in both the pile bottom and foundation soils subjected to the bending moment,shear force,and axial force resulted from both the vertical load and horizontal earth-quake load acting at the pile up-end. The shortcomings in the existing design method for piles are pointed out. A rather dependable theoretical basis is presented for strength calculation of the piles due to the detailed analytical analysis of internal forces and deformation in the pile body,and the selection of the design scheme of the pile,coefficients of K,and design width B,especially. The blindness in disposition of reinforcement occured in existing design process will be avoided,then.