主跨2×428 m三塔自锚式悬索桥缆吊系统设计

Cable Crane System Design of Three-tower Self-anchored Suspension Bridge with Main Span of 2×428 m

济南黄河凤凰大桥是目前世界上最大跨径的三塔自锚式悬索桥。介绍了大桥的主缆设计,列举了近年来大跨径悬索桥主缆钢丝的选用情况,可以看出,主缆采用高强、大直径钢丝已成为趋势;介绍了大桥主索鞍的设计,给出了空间索面主缆索鞍的两种设计方式;介绍了大桥中央扣的设计,通过调整多对串联刚性中央扣的纵向刚度,实现了3对中央扣的协调受力。

Jinan Fenghuang Yellow River Bridge is a three-tower self-anchored suspension bridge with the largest span in the world up to date.In the paper,the design of the main cable is introduced,and the selection of main cable steel wire for long-span suspension bridge in recent years is listed.It can be seen that it is a trend to use high-strength and large-diameter steel wire for main cable.By introducing the design of main cable saddle,two design methods of main cable saddle with spatial cable surface are given.The design of the central buckle of the bridge realizes the coordinated stress of three pairs of central buckles by adjusting the longitudinal stiffness of multiple pairs of series rigid central buckles.