摘要
用三维梁单元模拟混凝土薄壁筒桩的受力变形特征,用薄层接触面单元模拟桩与土体之间的相互作用,薄壁圆筒表面上的结点线位移用梁单元出口结点的线位移和转角位移表示,根据静力平衡条件提出了由接触面约束内力和桩上作用荷载求解桩体内力的计算公式,从而建立了桩土相互作用的有限元分析方法。对某工程薄壁筒桩在水平荷载作用下的桩体变形和内力进行分析,并与现场试验结果进行了比较,结果表明上述分析方法是正确的。
The 3-D beam element was used for simulating the stressdeformation characteristics of concrete thin-walled cylindrical piles,and the thin layer interface element was used for simulating the interaction between soil and piles.The nodal linear displacement on the surface of thin-walled cylindrical piles was expressed with the linear and angular displacements at exit nodes of beam elements.The computational formula for internal forces of piles in terms of interface restraining forces and loads on piles was given by use of the static equilibrium conditions,and the finite element analysis method for interaction between piles and soil was further developed.The method was applied to deformation and internal force analysis for thin-walled cylindrical piles under horizontal loads in a project,and correctness of the method was verified by comparison of the analyzed result with that of the field test.
出处
《水利水电科技进展》
CSCD
北大核心
2006年第2期34-36,共3页
Advances in Science and Technology of Water Resources
关键词
薄壁筒桩
桩土相互作用
梁单元
接触面单元
有限元分析
thin-walled cylindrical pile
interaction between pile and soil
beam element
interface element
finite element analysis
