纵向型钢加固空心板梁桥效应分析  

Analysis of the Effect of Longitudinal Section Steel Strengthening Hollow Slab Girder Bridge

作　　者：唐晶 刘智武[2] 周敏[2] 骆张航之 唐峰 TANG Jing;LIU Zhiwu;ZHOU Min;LUO Zhanghangzhi;TANG Feng(Jinhua Polytechnic,Jinhua 321007,China;Jinhua Traffic Planning and Design Institute Company Limited,Jinhua 321000,China)

机构地区：[1]金华职业技术学院建筑工程学院,浙江金华321007 [2]金华职业技术学院,浙江金华321007 [3]金华市交通规划设计院有限公司,浙江金华321000

出　　处：《金华职业技术学院学报》2020年第6期49-52,共4页Journal of Jinhua Polytechnic

基　　金：浙江省教育厅2018年度访问工程师校企合作项目“既有空心板梁铰缝破坏机理研究”(FG2018023)。

摘　　要：针对空心板梁桥的铰缝失效这一常见病害,以实际工程为背景,通过荷载试验分析纵向型钢加固方法的加固效果。结果表明,该桥经纵向型钢加固后在正载工况下主梁挠度平均降低了14%,应变平均降低了17%,在偏载工况下主梁挠度平均降低了21%,应变平均降低了21%,且加固后横向挠度系数更加平滑。所以,纵向型钢加固可以增强空心板梁桥的横向联系,提高整体刚度,改善荷载横向分布,加固效果明显。In this paper,aiming at the common failure of hinge joint of hollow slab girder bridge,taking the actual project as the background,the reinforcement effect of longitudinal section steel reinforcement method is analyzed by load test.The results show that,the deflection of the main girder is reduced by 14%,the strain is reduced by 17%under symmetrical loading,the deflection is reduced by 21%,the strain is reduced by 21%under asymmetrical loading,and the transverse distribution coefficient is smoother.Therefore,the longitudinal steel reinforcement can enhance the transverse connection of the hollow slab girder bridge,improve the overall stiffness,improve the transverse load distribution and the reinforcement effect is obvious.

关 键 词：铰缝失效 纵向型钢 空心板 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]