城市立交桥异形钢箱梁疲劳性能研究  

Research on Fatigue Performance of Irregular Steel Box Girders for Urban Interchanges

作　　者：吴慧山 WU Huishan(China Design Group Co.,Ltd.,Nanjing 210000,Jiangsu,China)

机构地区：[1]华设设计集团股份有限公司,江苏南京210000

出　　处：《工程技术研究》2023年第12期11-13,共3页Engineering and Technological Research

摘　　要：异形钢箱梁桥结构复杂,在车辆荷载反复作用下容易出现疲劳破坏。鉴于此,文章分析了疲劳应力、应力循环次数、应力集中等因素对异形钢箱梁桥疲劳破坏的影响。同时,以某城市立交桥为研究对象,利用有限元软件ANSYS建立计算模型,分析了横向轮迹分布和铺装层对异形钢箱梁疲劳应力幅的影响规律,研究成果可为类似项目的设计提供科学的理论指导。The structure of irregular steel box girder bridge is complex,and it is prone to fatigue failure under the repeated action of vehicle load.In view of this,the influence of fatigue stress,stress cycle times,stress concentration and other factors on the fatigue failure of irregular steel box girder bridge is analyzed.At the same time,taking a city interchange as the research object,the finite element software ANSYS is used to establish the calculation model,and the influence of wheel trace transverse distribution and pavement layer on the fatigue stress range of irregular steel box girder is analyzed.The research results can provide scientific theoretical guidance for the design of similar projects.

关 键 词：异形钢箱梁 疲劳破坏 影响因素 有限元 应力幅 

分 类 号：U441[建筑科学—桥梁与隧道工程]