某下承式钢桁梁桥荷载试验及分析  

Test and Analysis of Loads of Some Through Steel Truss Bridge

作　　者：刘兴文[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《公路交通技术》2015年第4期116-118,共3页Technology of Highway and Transport

摘　　要：针对某下承式钢桁梁桥进行荷载试验、数值计算分析及承载能力评定,对桥梁运营时出现的病害进行分析。研究结果表明:主桁静、动力刚度较好,主体结构工作正常,可以满足规范相关要求;纵、横梁连接处高强螺栓松动的主要原因是桥面不平顺并在横梁处形成激振源,在车辆荷载作用下桥梁竖向振动效应强烈所致。This paper carries out load test, numerical computing and analysis as well as evaluation of bearing capacity of some through steel truss bridge, and analyzes diseases during operation of bridge. The results of research show that rigidity of static and dynamic trusses is good, principal structures operate normally and can satisfy the requirements of specification; high - strength bolts at connection of longitudinal and transverse beams become loose mainly because of violent vertical vibration effect due to rough bridge deck and formation of excitation sources at transverse beams.

关 键 词：钢桁梁桥 荷载试验 动力特性 病害 

分 类 号：U448.211[建筑科学—桥梁与隧道工程]