平行钢丝索股与主鞍座抗滑移试验研究与分析——以温州瓯江北口大桥为例

Research and Analysis on Anti-sliding Test of Parallel Wire Strands and Main Saddle:Taking Wenzhou Oujiang North Bridge as an Example

温州瓯江北口大桥是国内首座三塔四跨双层钢桁梁悬索桥,中塔为A型框架混凝土塔。与传统的两塔悬索桥相比,三塔悬索桥中间主塔设计及其上主鞍座内主缆丝股抗滑移安全是整个结构设计的重点与难点。本文通过试验研究主缆与鞍座顶面和侧面、索股与竖向及水平隔板间摩擦力的关系,为主缆与鞍座间的摩擦机理研究及检验实际设计鞍座在全寿命期间的主缆与鞍座的摩擦力提供支撑。

Wenzhou Oujiang North Port Bridge is the first three-tower and four-span double-span steel truss suspension bridge in China.The middle tower is an A-frame concrete tower.Compared with the traditional two-tower suspension bridge,the design of the middle main tower of the three-tower suspension bridge and the anti-sliding safety of the upper main cable strand main saddle are the key points and difficulties of the whole structure design.In this paper,the relationship between the top and side of the main cable and saddle and the friction between the cable strand and the vertical and horizontal partitions are studied experimentally,to provide support for the research on friction mechanism between main cable and saddle and the test of the friction between the main cable and the saddle during the life of the actual design saddle.