用索拱体系加固提载刚架拱桥的分析研究

提出一种拱索体系加固现有钢筋混凝土刚架拱桥的方法,并以一座典型桥梁为例,对其加固前后的力学性能进行了分析,结果表明这种加固方法使桥梁的跨中弯矩和挠度大为减少,承载能力明显提高,它是一种加固早期修建钢筋混凝土刚架拱桥的有效方法,具有一定的理论意义和工程实用价值。本文还对该加固方法的施工程序及斜拉索的合理索力进行了论述。

Analysis of the Existing Reinforced Concrete Rigid Frame Arch Bridge Strengthened with Arch and Cable System

The project and method of the existing rigid frame arch bridge reinforced by changing arch structural system into arch and cable system is presented.Based on a typical bridge,the analysis of the static behavior of the bridge before and after the strengthening is preformed.The results show that the mid-span bending moment and deflection of the reinforced bridge are reduced obviously and the capacity of carrying load is greatly improved.It is proved that it is an effective method to reinforce the existing rigid frame arch bridges built early and enhance its capacity of carrying load.It has definite theory significance and practical engineering value.Constructional procedure of the bridge reinforced by changing arch structural system into arch and cable system and the reasonable cable force is also presented.