复合主拱圈加固石拱桥力学性态分析

Mechanical Behavior Analysis on Stone Arch Bridge Strengthened by Composite Main Arch Circle Method

从复合主拱圈加固石拱桥加固前后力学性态的角度,结合具体的实际加固工程,对加固前后主拱圈截面内力进行计算,阐述主拱圈截面强度和整体"强度-稳定"性提高率,验算新旧拱圈结合面抗剪承载力和新增结构对原结构的影响,提出一项基于承载力提高率的加固增强总体效果评价指标,以期对石拱桥加固设计方案比选、加固质量评定有一定的积极指导作用。

Based on mechanical behavior of strengthened composite main arch and practical strengthening projects,internal force of main arch bridge before and after reinforcement was calculated.Increase rate of the main arch cross-section strength and the overall ＂strength-stability＂ was expounded.Shear capacity of old and new arch ring combination surface and the impact of new structure on the original structure were checked.As a result,an increase overall effect reinforcing evaluation index based on increase rate of bearing capacity was proposed,which played a positive role in design options and quality assessment of arch bridge reinforcement.