桩锚试验的数值模拟

提出了一种新型的单元模型来模拟桩锚结构：桩体内的混凝土用脆弹性材料模型、钢筋用典型的应变硬化弹塑性材料模型、桩土间的相互作用则用一种特殊的非线性Winkler（文克尔）类地基来模拟其间的粘合、滑移和分离等力学状态．推导了锚桩工作状态下接触面处的位移解答和刚度公式，编写了有关的计算程序．根据试验的数据结果，用复形调优法对一些计算参数做了反分析研究．最后给出了计算实例，并与工程的实测数据进行了对比．

Numerical Simulation of the Anchoring Pile in Soil Layers

In the paper, a novel F.E. model is proposed to analyze the anchoring pile structure. The concrete and reinforcement of piles are regarded as brittle elastic material and elastic-plastic material respectively. The interaction between pile and soil is simulated by a kind of special Winkler type model. Then the mechanical behavior such as attachment, slide and separation between pile and soil can easily be calculated. Analytical formulae of the displacements and the stiffness matrix at the pile interface are deduced; a computer program is then developed. Several material parameters are determined by using back analysis from measurements of field test. An example including comparison between the calculated output and the experiment data is finally presented.