关键词: 横向荷载, 桩-土相互作用, 无网格法, 不连续介质

Abstract: A newly developed numerical method in geotechnical engineering, i.e. element-free Galerkin method (EFGM) or meshless method, as well as the moving least square method characterized by the local technique, is used to simulate the pile-soil interaction under horizontal load. In the present method, the discontinuous problem of material between pile shaft and surrounding soil is considered and resolved; and an EFGM calculation program is also developed by MATLAB. Based on the program, the deformation behavior of pile shaft under various magnitude of horizontal loads, types of surrounding soil and stiffness rations of pile shaft to surrounding soil is discussed in detail; and some qualitative conclusions are drawn. Through the application of the present method to an engineering example, the good agreement between the results by the program and that by the common FEM software (i.e. ANSYS) indicates that the present method has more advantages in such respects as accuracy and post-process convenience compared with those traditional numerical methods such as the finite element method.

Key words: horizontal load, pile-soil interaction, meshless method, discontinuous medium