大跨度变高度连续钢桁架桥设计  

Design of Long-span Variable Height Continuous Steel Truss Bridge

作　　者：汤秋华 TANG Qiuhua

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海市200125

出　　处：《城市道桥与防洪》2020年第8期94-97,M0011,共5页Urban Roads Bridges & Flood Control

摘　　要：基于园区景观的需求,桥梁采用(50+110+50)m变高度连续钢桁架结构,桥梁整体造型优美,与周边建筑景观相协调。上部梁采用开口式、半穿式钢桁架形式,结构较为新颖;主桁杆件中弦杆采用开口π形截面,腹杆采用格构式截面,杆件连接节点采用夹板式构造,为今后钢桁架桥的设计提供了新的思路;桥梁上铆钉使用数量达10万余颗,热铆工艺的大量使用表明铆接工艺在特定场合仍有其优势,同时也为现代钢桥的设计拓展了思路[1-3]。现主要介绍了该桥的总体布置,结构设计要点,结构静、动力分析结论及主要施工方法。Based on the requirements of the park landscape,the bridge adopts a(50+110+50)-m variable height continuous steel truss structure.The overall shape of the bridge is beautiful and is in harmony with the surrounding architectural landscape.The upper beam adopts the form of open and semi-perforated steel truss.Its structure is relatively new.The chord in the main truss has an openπ-shaped section.The web rod has a lattice section.The splint structure is adopted for the connecting node of the rod.The new idea is provided for the design of steel truss bridge in the future.There are more than 100000 rivets used for the bridge.The extensive use of hot riveting process shows that the riveting process still has its advantages in specific occasions,and the ideas for the design of modern steel bridges are expanded.The overall layout,structural design essentials,structural static and dynamic analysis conclusions,and main construction methods of the bridge are introduced.

关 键 词：变高度连续钢桁架 半穿式钢桁架 开口式钢桁架 铆钉连接 有轨电车专用桥 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]