静、动载荷下桩-土作用体系的非线性有限元分析

Nonlinear finite element analysis of pile-soil interaction system under static and dynamic load

针对基桩载荷传递机理复杂的特性,引入非线性本构模型,采用ANSYS有限元分析方法,建立了基于三维有限元的可靠性计算模型,模拟了基桩在静、动载荷下灌注桩与土之间的相互作用,通过逐级加载法,分析其力学特性,得出相应变化规律,即:桩顶位移呈发散式分布,认为共同作用整体分析方法是优化设计最理想的方法,应优化桩身侧阻和桩端阻力的分布和发挥程度,为后续基桩的设计、施工和研究提供可靠的理论依据.

According to the complex features about the transfer mechanism of pile loading,the non-linear constitutive model is introduced.Using ANSYS finite element analysis,incorporating a three dimension element-dependent and loading step by step to simulate the interaction between pile and soil on the static and dynamic loading,their mechanical properties are analyzed and their variational law is reduced.That is,the displacement of pile top is a divergent type distribution and the combined function overall analysis way is to be thought as the best way,then the designer can use the date of the side friction and end resistance of pile.So this result will provide a reliable theoretical basis about the design,construction and study of pile in detail for the future.