摘要
金口河大渡河大桥是主跨为175 m中承式钢管混凝土悬链线拱桥,桥面结构体系由混凝土横梁和T型桥面板组成,由于桥面结构和吊杆的破坏使桥面存在整体坍塌的安全隐患,须对该桥桥面结构体系进行加固改造。加固前采用结构验算方法评估该桥结构状态,针对病害提出具体加固设计,并对设计后的结构进行结构验算。通过加固改造以后,计算结果表明,车行道桥面板和新增钢纵梁均满足要求,桥面结构体系的竖向基频提高约12%,横桥向基频提高约18%,大桥桥面结构体系静力性能和动力性能均得到明显改善。
Dadu River Bridge in Jinkouhe District is a mid-supported CFST catenary arch bridge with a main span of 175m.The bridge deck structure consists of concrete beams and T-shaped bridge decks.The bridge deck may be completely collapsed due to the damage of the bridge deck structure and the derrick.The bridge deck structure system shall be strengthened and reconstructed.Before the reinforcement,the structural verification method is used to evaluate the structural state of the bridge,and the specific reinforcement design is proposed for the disease,and the structural verification is carried out for the designed structure.After reinforcement and transformation,the calculation results show that the roadway bridge deck and the new longitudinal steel beam meet the requirements.The vertical fundamental frequency of the bridge deck structure system is increased by about 12%,and the transverse fundamental frequency is increased by about 18%.The static performance and dynamic performance of the structural system improved significantly.
作者
李琦
杨金洁
姚山
LI Qi;YANG Jinjie;YAO Shan(China Merchants Chongqing Communications Technology Research & Design Institute Co., Ltd.,Chongqing 400067;School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074)
出处
《公路交通技术》
2019年第1期70-76,共7页
Technology of Highway and Transport
基金
国家重点研发计划资助项目(2017YFC0806000)
关键词
拱桥
桥面结构体系
加固改造
钢纵梁
动力性能
arch bridge
bridge deck structure system
reinforcement&retrofitting
longitudinal steel beam
dynamic performance
作者简介
李琦(1980-),男,四川省眉山市人,博士研究生,高工,主要从事桥梁检测与加固有关的试验研究工作。E-mail:15584358@qq.com。
