增大截面法加固拱桥承载能力计算

以湖南省某石拱桥为研究对象，运用增大截面法对拱桥进行了加固，依据规范的要求进行截面设计，并运用大型空间有限元软件ANSYS对加固前后的拱桥结构进行了受力分析，通过对分析结果进行比较，表明运用增大截面法对拱桥的主拱圈进行合理的加固改造，加固后承载能力提高30％左右，且无新增裂缝，加固效果良好。

The bearing capacity calculation of the arch bridge reinforcement by the augmented section method

As one arch bridge on Hu＇ nan province for research object, it uses the augmented section method to reinforce the arch bridge. According to the codes to design the section, it uses the large scale spatial finite element software ANSYS to has a force analysis on the arch bridge structure before and after designing. Through the comparison between the analyzed results, it demonstrates the bearing capacity improved 30% after the reinforcement by operating the augmented section method to have reasonable reinforcement and reconstruction for the main arching of arch bridge. The sound effect in the reinforcement and has no new adding cracks.