水平荷载作用下桩的变形非线性简化分析

A Simplified Nonlinear Deformation Analysis of Lateral Loaded Piles

很多情况下,桩基础在承受竖向荷载的同时,还要承受水平方向的荷载。在某些重要工程中,水平荷载成为设计时的控制因素。此时,桩的破坏是由于水平荷载作用产生过大的桩身内力和弯矩所引起的。以Winkler地基模型模拟桩土之间的相互作用,考虑土体的非线性,采用理想弹塑性和双曲线非线性地基反力模型,提出了基于有限差分法的水平荷载作用下桩的变形非线性简化分析方法。将计算所得结果与有限元计算进行了对比分析,并与已有文献试验结果作了比较。

In many cases, the pile foundations are commonly used to resist axial and lateral loads at the same time. The lateral loaded pile has become the controlling factors of design in some important engineering works, when the destruction of pile is due to the excessive forces and bending moment caused by horizontal loads. Modeling pile - soil interaction with Winkler model and considering the nonlinearity of the soil, a simplified nonlinear deformation analysis of lateral loaded piles is presented based on ideal elastic - plastic and hyperbolic soil resistance model. Comparisons are made between the results obtained from these two methods, and those by finite element analysis as well as the test results given in literature.