中下承式拱桥吊杆断裂工况时的设计研究  

Study on Design of Suspender Fracture Condition of Half-Through Arch Bridge

作　　者：郭卓明 GUO Zhuo-ming(Municipal Design Institute,Shanghai Urban Construction Municipal EngineeringCo.,Ltd.,Shanghai 200065,China)

机构地区：[1]上海城建市政工程(集团)有限公司市政设计院,上海200065

出　　处：《中国市政工程》2022年第2期17-20,24,104,共6页China Municipal Engineering

摘　　要：采用简化模型和实桥模型对拱桥吊杆断裂工况作比较并进行详细参数分析。结果表明,单根吊杆断裂时,相邻未受损吊杆内力放大系数小于吊杆设计安全系数,可按常规设计;系梁弯矩增加较大,应考虑加强设计。最后给出无动力分析时吊杆和系梁的动力放大系数建议值。The simplified model and the real bridge model are used to compare the fracture conditions of the suspender of the arch bridge,and the detailed parameter analysis is carried out.The results show that when a single suspender is broken,the internal force amplification factor of the adjacent undamaged suspenders is less than the design safety factor of the suspender,which can be designed according to the conventional design;The bending moment of the tie beam increases greatly,and the strengthening design should be considered.Finally,the recommended values of dynamic amplification factors of suspenders and tie beams without dynamic analysis are given.

关 键 词：拱桥 吊杆断裂 动力放大系数 吊杆设计 系梁设计 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]