水平荷载桩桩土共同作用全过程分析

Complete analysis of pile-soil interaction for laterally loaded pile

在桩基础的分析中 ,对水平荷载桩的计算长期限于弹性 ,而只考虑桩周土体的非线性。本文在考虑钢筋混凝土桩非线性损伤的情况下建立了一种空间耦合数值计算模型 ,并编制了相应的计算程序。通过算例分析证明了所设计的计算程序是合理的和可行的。本文方法可以模拟计算桩身混凝土损伤引起的刚度降低和桩周土体不同应变软化模式对桩身水平位移的影响 ,与传统的或规范意义下的分析方法相比具有机理分析清楚 。

In the pile foundation engineering, the analysis of laterally loaded pile-soil interaction is confined to elastic pile and nonlinear soil for a long time.In this paper a space coupling numerical model for pile-soil system with nonlinear damage of reinforced concrete is established. The feasibility and rationality of this approach are proved by an example. The reduction of pile stiffness caused by concrete damage and increment of lateral displacement produced by softening of soil near pile can be simultaneously computed in this approach. Its physical meaning and mechanism are clearer than that of conventional approaches existing before.