单跨铁路跨线桥预应力简支空心桥面板荷载试验  

Load test on prestressed simply supportedhollow deck of single span railway overpass bridge

作　　者：陈文举 陈自焱 王龙胜 苏宏军 谢万友 胡雷 Chen Wenju;Chen Ziyan;Wang Longsheng;Su Hongjun;Xie Wanyou;Hu Lei(China Railway Erju Co.,Ltd.,Chengdu Sichuan 610032,China;Chongqing Rongchang District Traffic Engineering Construction Center,Chongqing 402460,China)

机构地区：[1]中铁二局集团有限公司,四川成都610000 [2]重庆市荣昌区交通工程建设中心,重庆402460

出　　处：《山西建筑》2024年第3期150-154,共5页Shanxi Architecture

基　　金：重庆市留学人员回国创业创新支持计划(cx2022007)。

摘　　要：桥梁面板直接承受反复车轮荷载,活载效应大,疲劳破坏风险大,已成为桥梁工程领域不可忽视的问题。单跨铁路跨线桥预应力简支空心桥面板较为少见,有较高的研究价值,以某现状单跨铁路跨线桥为工程背景,利用三轴车辆进行静载、动载试验,测量桥梁跨中截面的挠度和应变。结果表明:桥跨结构强度满足要求;卸载后相对残余变形在20%范围内,桥跨结构处于弹性工作状态。Bridge panels directly bear repeated wheel loads,resulting in large live load effects and high risk of fatigue damage,which has become a problem that cannot be ignored in the field of bridge engineering.The prestressed simply supported hollow bridge deck of a single span railway overpass bridge is relatively rare and has high research value.Therefore,this paper takes a current single span railway overpass bridge as an engineering background,and conducts static and dynamic load tests using three axle vehicles to measure the deflection and strain of the midspan section of the bridge.The results show that the strength of the bridge span structure meets the requirements;After unloading,the relative residual deformation is within 20%,and the bridge span structure is in elastic working state.

关 键 词：桥梁工程 桥梁荷载试验 单跨铁路跨线桥 预应力简支空心桥面板 

分 类 号：TU997[建筑科学—市政工程]