拓宽桥梁在新旧桥梁连接处收缩徐变效应的研究

The Research on Shrinking and Creep Effect at the Joint between Old and New Bridges during Bridge Widening

探讨桥梁拓宽时,新旧桥梁以固接法相连接,不同的收缩徐变效应对桥梁的湿接缝所产生的应力。采用有限元分析软件DAINA建立有限元模型加以分析,来了解新建桥梁建造完后与旧有桥梁相接的应力影响。由分析结果得知新旧桥梁连接线两端的剪应力影响最大。

This paper discussed that the stress generated by different shrinking and creep effects on bridge wet joint when consolidation method was employed for old and new bridges connection during bridge widening.Finite element analysis software DAINA was adopted to build finite element model for analysis so as to make clear the stress effect of the newly-built bridge connecting old bridge. It was concluded from analysis result that the shear stresses at the two ends of connection line of old and new bridges were maximum.