桥梁大型群桩基础的有限元计算分析

FEM Analyses of Large Groups of Piles for Bridge Foundation

以某异形独塔斜拉桥的群桩基础为背景,采用有限元计算程序,对承台进行梁格系的结构离散,对群桩基础进行结构分析计算,并将计算结果与传统的在刚性承台假设下的计算作比较。经比较表明,新的有限元计算方法对结构的模拟更为合理,计算结果也更接近实际结构效应。

Based on a special shaped single pylon cable-stayed bridge on the foundation of group piles, the program for FEM calculation is adopted for dispersion of the beam grillage system at the footing and for structural analysis and calculation of the group pile foundation. Then the results from calculation are compared with the assumed calculation in conventional rigid footing. It is shown that the new FEM calculation is more reasonable and closer to the actual structural effect.