增大截面法加固双曲拱桥技术研究

Enlarged cross section method of hyperbolic arch bridge reinforcement technology

针对双曲拱桥实例出现的主要病害,在结构安全评估的基础上,本着结构病害治理以及提升荷载等级的要求,采用扩大拱肋截面加固法结合相应的病害处理方案对溆浦东水大桥进行维修加固,扩大截面法即通过钢筋混凝土加大加厚拱肋,扩大拱肋的截面尺寸,同时建立有限元模型计算分析加固前后的实际承载效果,进而判定此加固方法的有效性及合理性。

Aimed at main diseases of hyperbolic arch bridge, on the basis of structural safety evaluation, in line with the structure disease governance and improve the requirement of load level, the expansion of the arch rib reinforcement method combined with the corresponding disease treatment scheme to maintenance of Xupudongshui bridge, expand section method namely by reinforced concrete increase thickening arch rib, and expand the section size of arch rib, at the same time to establish the finite element model to analyze the actual load effect of before and after reinforcement, and determine the validity and rationality of this method.