大跨度钢桁架拱桥结构仿真分析  

Analysis of the Simulation Calculation Analysis of the Large-span Steel Truss Arch Bridge

作　　者：王泉清 赵健 安路明 刘银涛 WANG Quanqing;ZHAO Jian;AN Luming;LIU Yintao(Guangzhou Nansha Zhujiang Construction Project Management Co.,Ltd.Guangzhou 510630,China;China Railway Construction Bridge Engineering Bureau Group South Engineering Co.,Ltd.Tianjin 300300,China)

机构地区：[1]广州南沙区珠江建设项目管理有限公司,广州510630 [2]中国铁建大桥工程局集团有限公司,天津300300

出　　处：《广东土木与建筑》2022年第1期61-64,共4页Guangdong Architecture Civil Engineering

摘　　要：南沙某大桥是一座主跨436 m的大跨度中承式钢桁架拱桥,为了分析研究在100年一遇的风速、温度荷载和车辆荷载等复杂外力作用下该大桥结构受力的安全性,采用Midas/Civil分析软件对该大桥建立了空间有限元模型,分析验算了该大桥运营状态下的应力和变形特征。结果表明:在成桥营运阶段,该大跨度钢桁架拱桥的挠度和应力满足《铁路桥梁钢结构设计规范:TB 10091—2017》[1]要求,钢桁架杆件和吊杆的强度、稳定、疲劳等满足文献[1]要求;同时该桥的主拱拱顶拱脚、主梁跨中及最边侧部位吊杆为同类构件中结构内力最不利位置,在运营期间应重点关注,定期检查。A bridge in Nansha is a 436 m long-span mid-through steel truss arch bridge,in order to analyze and study the safety of the bridge structure under complex external forces such as wind speedonce in 100 years,temperature load and vehicle load,the Midas/Civil analysis software was used to establish a spatial finite element model of the bridge,and the stress and deformation characteristics of the bridge in operation were analyzed and checked. The results show that:in the operation stage of the bridge,the deflection and stress of the longspan steel truss arch bridge meet the requirements of the specification, and the strength, stability, fatigue, etc. of the steel truss members and suspenders meet the requirements of the specification;at the same time,the arch toe of the main arch,the mid-span of the main girder and the suspenders at the outermost side of the bridge are the most unfavorable positions for structural internal forces among similar components,the focus should be paid attention to and checked regularly during the operation period.

关 键 词：大跨度 钢桁架拱桥 有限元 仿真分析 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]