摘要
重庆轨道交通环线鹅公岩轨道专用桥是轨道环线跨越长江、连接主城南岸区和九龙坡区的重要控制性节点工程,因通航条件限制,采用“先斜拉,后悬索”的成桥施工方案。通过对体系转换后成桥状态下的桥梁进行动载试验,检验大跨径自锚式索桥结构的动力性能。测定桥跨结构的固有频率、振型及阻尼比,分析评价桥梁的动力系数和桥梁的刚度是否满足有关要求,掌握解桥梁结构的动力特性和动力响应。
Egongyan railway special bridge of Chongqing rail transit loop line is an important control joint project of rail loop crossing the Yangtze River and connecting the South Bank of the main city and Jiulongpo District.Due to the limitation of navigation conditions,the construction scheme of"cable-stayed first,then suspension cable"was adopted.The dynamic performance of long-span self anchored cable bridge is tested by dynamic load test of the bridge after system transformation.To determine the natural frequency,vibration mode and damping ratio of bridge span structure,analyze and evaluate whether the dynamic coefficient and stiffness of bridge meet the relevant requirements,master and understand the dynamic characteristics and dynamic response of bridge structure.
作者
龚彦铭
GONG Yan-ming(Chongqing Rail Transit(Group)Co.Ltd.,Chongqing 400000,China)
出处
《工程建设与设计》
2022年第11期89-95,共7页
Construction & Design for Engineering
关键词
自锚式悬索桥
动载试验
阻尼比
动力系数
动力响应
self-anchored suspension bridge
dynamic test
damping ratio
dynamic coefficient
dynamic response
