加宽改建中新旧桥混凝土收缩徐变差异影响分析

在超静定结构中混凝土的收缩徐变是影响桥梁拓宽改建的难点，通过力学计算对拓宽后新旧桥梁混凝土收缩和徐变进行差异影响分析，结果表明：从设计角度讲，尽量延长新旧桥的拼接时间对桥梁的受力是有利的。

Creep Difference of Concrete Shrinkage Between Old and New Bridge in Widening Construction

The shrinkage and creep of concrete in byperstatic structure is the difficuity of bridge widening. This paper analyzes creep difference of concrete shrinkage in old and new bridge widening construction through mechanical calculations. The results show that it is beneficial to try to extend the old and new bridges stitching time from the design point.