基于柔度系数求解桥梁桩基对桥墩约束刚度的有限元数值分析

FEM numerical analysis of elastic bearing rigidity of pile foundation based on inverse deduction of flexibility coefficient

以桥梁桩基础为研究对象,基于弹性地基梁"m"法理论,通过柔度系数提出桥梁桩基础对桥墩约束刚度的有限元数值计算方法,探讨桩基有关参数诸如桩径、入土深度、地面以上长度、地质条件以及桩数对约束刚度的影响规律。研究结果表明:本文结果对桥墩设计、桥墩承载能力与桥墩抗震防灾能力评估具有一定的指导意义。

Based on the elastic subgrade beam ＂m＂ theory and the flexibility coefficient,the finite element numerical formulation of the restrained stiffness of bridge piers caused by the pile foundation was presented,the influences of the parameters of pile foundation such as pile diameter,pile depth under ground,pile length above ground,geological conditions and the number of piles to the restrained stiffness of bridge piers were also explored.The results have some instructive significances for design,bearing capacity analysis,anti-seismic and disaster –proof evaluation of bridge piers.