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为解决岩土工程中土体-结构界面的复杂接触行为问题,根据接触非线性理论和桩土不同物理力学特性的特点,结合前人的相关试验和理论成果,将应用于计算机辅助几何设计中的Nurbs样条曲线引入到造型单元中。给出了样条造型单元的变形求解方法,用Maple软件编程产生数据库,并用ABAQUS软件的用户子程序接口调入数据和编制的桩土界面接触单元。结果表明,这种造型单元可以很好地模拟复杂应力路径下的土体-结构界面的复杂变形行为。
In order to solve the complex contact behavior of soil-structure interface in geotechnical engineering, according to the contact nonlinear theory and the characteristics of different physical and mechanical properties of pile-soil, combined with the related experiments and theoretical achievements of predecessors, it will be applied in the computer aided geometric design Nurbs spline curve into the modeling unit. The method of solving the deformation of the spline modeling unit is given. The database is generated by using Maple software, and the data and the compacted pile-soil interface contact unit are imported by the user subroutine interface of ABAQUS software. The results show that the modeling unit can well simulate the complex deformation behavior of soil-structure interface under complex stress path.