大跨度悬索桥耐久性设计发展探讨——以龙潭长江大桥打造悬索桥精品工程为例

Discussion on Durability Design Development of Large-Span Suspension Bridge:Taking Longtan Yangtze River Bridge to Create a Suspension Bridge Excellent Project as an Example

悬索桥耐久性设计关系着整座桥梁的使用寿命。在正常运营阶段,越来越多的悬索桥构件逐渐暴露出耐久性问题,使部分悬索桥在没有达到设计使用年限时就已出现各种桥梁病害。以龙潭长江大桥耐久性设计为例,探讨悬索桥主缆、吊索、散索鞍、桥面伸缩装置及支座等构件耐久性设计发展趋势。

The durability design of suspension bridge is related to the service life of the whole bridge.In normal operation stage,more&more suspension bridge components gradually expose durability problems,so that some suspension bridges have appeared various bridge diseases before reaching their design service life.Taking the durability design of Longtan Yangtze River Bridge as an example,the development trend of durability design of suspension bridge components such as main cable,sling,splay saddle,bridge deck expansion device&support is discussed.