铁路上承式连续钢桁梁桥的静力性能  

Static Performance of Continuous Steel Truss Bridge with Upper Deck on Railway

作　　者：荣峤 RONG Qiao(Railway Engineering Research Institute,CARS,Beijing 100081,China;State Key Laboratory for Track System of High-speed Railway,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [2]高速铁路轨道系统全国重点实验室,北京100081

出　　处：《铁道建筑》2024年第7期75-78,共4页Railway Engineering

基　　金：中国铁道科学研究院集团有限公司基金(2023YJ124)。

摘　　要：南昆线(南宁—昆明)八渡4号桥主桥结构形式为2×64 m单线上承式栓焊连续钢桁梁桥,侯月线(侯马—月山)浍河特大桥主桥结构形式为3×64 m单线上承式栓焊连续钢桁梁桥,两座铁路桥梁设计图号均为贰桥0003,设计荷载为中-活载。为了检验该类桥梁的承载能力及整体刚度,分析其检验评价方法,对两座桥梁进行了静载试验,并将静载试验数据、理论计算值与规范限值进行比较。结果表明:两座钢桁梁桥的承载能力及整体竖向刚度满足规范要求,测试支座活动正常,符合现有状态下的使用运营要求,但该图号钢桁梁的杆件承载能力储备及梁体竖向刚度储备不高。The main bridge of Nanning-Kunming Railway BaDu No.4 bridge is a 2×64 m span single line welded continuous steel truss bridge,and the main bridge of Houma-Yueshan Railway Hui river bridge is a 3×64 m span single line welded continuous steel truss bridge.The design number of the two railway bridges is Erqiao0003,and the design load is medium-live load.In order to test the carrying capacity and overall stiffness of this kind of bridge and to analyze the inspection and evaluation methods,static load tests were conducted on the two bridges.The static load test data and the theoretical calculation were analyzed and compared with the norm limits.The results show that the bearing capacity and the overall vertical stiffness of the two steel truss bridges meet the requirements of the specification,and the bearing is normal and meets the operation requirements at the current state.Also,the test data show that the margin is not high in term of the bearing capacities of members of the steel truss beam and the vertical stiffness of the beam.

关 键 词：铁路桥梁 静载试验 上承式钢桁梁 连续钢桁梁 挠度 应力 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]