自锚式悬索桥锚固段合理总体布置研究

Study on Reasonable Overall Layout of Anchorage Section of Self-anchored Suspension Bridge

摘要:

锚固段是自锚式悬索桥的关键受力部位。结合某336 m跨径自锚式悬索桥的锚固段总体布置设计，对自锚式悬索桥的锚跨设置、散索鞍/套设置、锚固段重心调整等问题进行分析研究，建议主梁竖向刚度不控制设计时取消锚跨，边跨主缆入射角适中时优先采用散索套，提出了锚固段合理重心的调整思路。上述结论可为今后同类型结构的设计提供参考。

Abstract:

Anchorage sections are key stress parts of self-anchored suspension bridge. Combined with the overall layout and design of the anchorage section of a 336 m-span self-anchored suspension bridge, the anchor span setting, cable splaying saddle/sleeve setting, anchorage section gravity center adjustment and the other problems of the self-anchored suspension bridge are analyzed and studied. It is suggested that the anchor span should be canceled when the vertical stiffness of the main beam is not controlled to design. And the cable splaying sleeve should be preferred when the incidence angle of the main cable of the side span is moderate. The idea of adjusting the reasonable gravity center of the anchorage section is proposed. The above conclusions can provide the reference for the design of similar structures in the future.