某下承式钢管混凝土系杆拱桥吊杆更换设计

The Suspender Replacement Design for CFST Tied Arch Bridge

国内上世纪90年代建成钢管混凝土系杆拱桥,已经服役了二三十年,吊杆设计使用年限为20年。目前,这类桥梁均面临着吊杆更换的难题,吊杆更换设计没有可参考规范和通用的工程案例。本文结合某下承式钢管混凝土系杆拱桥吊杆更换设计,总结了该类桥梁吊杆更换设计的关键技术,梳理了吊杆更换的施工程序,可为同类工程提供有益参考。

The CFST tied arch bridges built in the 1990s have been in service for 20~30 years,and the design service life of suspenders is 20 years.These bridges are confronting with the difficulty of replacing suspenders.There is no reference specification and general engineering case for suspender replacement design.Combined with a suspender replacement design for CFST tied arch bridge,the critical technology of suspender replacement design is summarized in this paper,and the suspender replacement procedures are organized,these methods would provide beneficial reference for similar engineering.