三塔悬索桥刚性中塔的鞍缆防滑技术

李扬, 肖汝诚, 周云岗

同济大学桥梁工程系



摘要:

为了解三塔悬索桥刚性中塔不同结构的鞍缆防滑效能,提出5个方案,即在跨中设置中央扣、改变矢跨比、在塔根和主缆间设置扣索、在塔顶处设置钢结构构件、在索鞍两侧主缆上添加辅助拉索.有限元法和解析法的结果显示,中央扣和扣索方案的效果甚微,其余3个方案则十分有效.据此给出相应设计建议.

关键词:  三塔悬索桥  刚性中塔  索鞍  主缆  抗滑

DOI：10.11918/j.issn.0367-6234.2011.02.026

分类号:U442

基金项目:国家高技术研究发展计划项目(2006AA11Z120);高等学校博士学科点专项科研基金项目(20050247029)



Anti-slip technology between main cable and saddle on rigid middle tower of three-tower suspension bridge

LI Yang, XIAO Ru-cheng, ZHOU Yun-gang

Department of Bridge Engineering,Tongji University,200092 Shanghai,China,

Abstract:

To understand the effects of anti-slip techniques between main cable and saddle of a three-tower suspension bridge with a rigid middle tower,five structural schemes are proposed,which are adding a central buckle,changing the rise-span-ratio,installing a buckling cable between tower and main cable,setting a steel structure on the top of tower and fabricating an assistant cable near the saddle.The calculated results by finite element method and analytical method show that the central buckling scheme and buckling cable scheme have little anti-slip effect,but the other three schemes are very effective.Based on these some design recommendations are given.

Key words:  three-tower suspension bridge  rigid middle tower  saddle  main cable  anti-slip