徐变对钢管混凝土拱桥的影响分析

Analysis of Creep Influence on CFST Arch Bridges

在使用继效流动理论对钢管混凝土轴心受压构件徐变进行分析计算的基础上,将其与有限元分析工具相结合,对钢管混凝土拱桥的徐变行为进行了分析。算例计算结果表明:钢管混凝土拱桥在使用老化阶段的徐变将会显著影响其结构本身的变形性能和内部受力状态,应该引起足够的重视。采用本文方法分析徐变对钢管混凝土拱桥的影响,所得结果比较合理。

In this paper,the elastic continuation and plastic flow theory of axialcompression Concrete Filled Steel Tubular (CFST) memberss applied to creep analysis of the CFST arch bridges through finite element analysis program.The corresponding analysis result indicates that the effect of creep of the CFST arch bridge can influence its deformation behavior and force state remarkably and the result gotten with this method is reasonable.