桩土界面荷载传递模型的改进及其数值实现

目前,在数值模拟中,桩土界面的刚度缺乏简便可靠的确定方法.针对这一问题,本文提出了桩土界面改进双曲线模型,该模型中初始刚度由极限剪应力和极限相对位移的比值来确定,可考虑桩土相对滑移和土体深度效应的影响,并以有限差分软件FLAC3D为平台,利用其内嵌的FISH汇编语言编程,将改进双曲线模型应用到FLAC3D的桩土相互作用的模型中.最后,通过实例验证,将本文方法的计算值、FLAC3D内嵌理想弹塑性模型的计算值与相关文献中的结果进行对比.结果表明:本文提出的改进双曲线模型及数值实现是合理的,能够更为合理地模拟桩土共同作用.

Improvement on the Load Transfer Model of Pile-Soil Interface and its Numerical Simulation

At present,in the numerical simulation,there lacks a simple and reliable method to determine the stiffness of the pile-soil interface.This paper proposed an improved hyperbolic model for the pile-soil interface,in which the stiffness of the interface is determined by the ratio of the ultimate shear stress to the ultimate relative displacement.Based on the finite difference code FLAC3D,the built-in assembly language,FISH,was then used to compile the improved hyperbolic model,which was later used in the simul...