接触问题的一种有限元解法及其在岩土工程中的应用

岩土结构与岩土体的界面及岩土体中存在的节理、滑动面等各类接触面的模拟是岩土计算中一个重要但尚未很好解决的问题 ,应用虚功原理建立接触问题的计算公式 ,发展了相应的有限元计算方法 ,并用该法计算了挡墙土压力、单桩承载力、盾构法施工的隧道等问题 ,证明了该法求解岩土工程问题的可行性及有效性。

A FINITE ELEMENT APPROACH FOR CONTACT PROBLEMS AND ITS APPLICATION FOR GEOFECHNICAL PROSECT

In the numerical approaches for geotechnical problems,the simulation of contact interfaces such as interface between structure and geotechnical mass,the joints in rock or sliding face in soil is critical,for they will affect the behaviors of the structure and geotechnical mass significantly.The formulae for contact problems are constructed on basis of the virtual work principle of deformable bodies,and the corresponding solving techniques with FEM are developed.The feasibility and validity of the approach is verified through three examples concerning earth pressure on retaining wall,bearing capacity of a single pile,and a shield-driven metro tunnel.