摘要
以主跨336m的宁波梅山春晓大桥为背景,研究大跨钢桁拱桥的设计关键技术。通过结构体系的对比研究,优化结构温度荷载效应;创新菱形风撑设计,提升桥梁的抗台风能力和景观性能;研发齿形接缝桥面板和分段张拉技术,提升桥面板抗裂性能;建立“球形支座+金属阻尼器”减隔震体系,增强大桥抗震性能;提出固塔少扣索施工工艺,大幅降低施工措施费用。研究成果可为强震强风区大跨度钢桁拱桥提供技术参考。
Taking the 336 m main-span Ningbo Meishan Chunxiao Bridge as a case study,this paper investigates key technologies for long-span steel truss arch bridges.Through comparative studies on structural systems,temperature load effects are optimized.A diamond-shaped wind bracing design is innovatively proposed to enhance typhoon resistance and aesthetic performance.Crack-resistant bridge deck technology is developed using serrated joint panels and segmented tensioning methods.A seismic reduction and isolation system combining spherical bearings and metal dampers is established to improve earthquake resistance.A construction method of"fixed tower with fewer stay cables"is introduced,significantly reducing construction costs.The research outcomes provide technical references for long-span steel truss arch bridges in regions prone to strong earthquakes and typhoons.
作者
王青桥
顾民杰
WANG Qingqiao;GU Minjie
出处
《上海公路》
2025年第3期95-101,109,I0011,共9页
Shanghai Highways
关键词
钢桁拱桥
全焊连接
结构体系
风撑
减隔震体系
固塔少扣索
steel truss arch bridge
fully welded connection
structural system
wind bracing
seismic reduction and isolation system
fixed tower with fewer stay cables
