增大截面法加固石拱桥最小加固层厚度

Minimum Thickness of Reinforcing Layer of Stone Arch Bridge Strengthened by Section Enlargement Method

以容许应力理论为基础,考虑利用增大截面法加固主拱圈前后的受力特点,并以保证加固层与原结构变形协调为前提,在加固前建立一个关于加固层厚度的截面破坏方程,通过合理的解方程来确立加固层最小厚度,从而为快速确定最小加固层厚度提供合理的理论保证,并减少试算和验算的工作量,对石拱桥加固理论化有着一定的推动作用。

Based on the allowable stress theory, considering the stress characteristics of reinforcing layer before and after reinforcement, and guaranteeing the reinforcing layer and the original structure distortion coordination as a premise, a equation about reinforcing layer thickness section destruction was established before reinforcement to determine the reasonable thickness of reinforcing layer. It provides the theory basis to guarantee the reinforcement structure works, reduces the trial calculation and the checking calculation work load, and promotes the theory development of stone arch bridge structure reinforcement.