摘要
为探究中央扣对大跨度三塔悬索桥抖振的控制作用,本文以泰州大桥为研究对象,基于有限元时域分析方法,研究了不同刚度中央扣对大跨度三塔悬索桥抖振性能的影响。研究结果表明:相比跨中短吊杆,采用中央扣后主梁竖向抖振响应显著降低,且刚性中央扣对于主梁整体竖向位移的控制效果更优;中央扣对主梁侧弯模态频率的影响较小,因而主梁侧向的抖振位移减幅不大;增设中央扣会增大中塔附近的主梁扭转抖振响应值,但同时也能减小边塔附近的主梁扭转抖振响应。研究结果可为中央扣在多塔悬索桥中的应用提供参考。
This paper presents an investigation of the control effect of the central buckle with different stiffnesses on buffeting performance of a long-span three-tower suspension bridge,namely,the Taizhou Yangtze River Bridge,by the finite element time-domain analysis method.The results show that the vertical buffeting response of the deck is influenced significantly by the central buckle in comparison with the short hanger at the mid-span and that the rigid central buckle control effect on the vertical buffeting displacement is much better.The application of the central buckle has little influence on the lateral dynamic characteristics of the bridge,which leads to little effect on the lateral buffeting displacement control.The central buckle can increase the torsional buffeting displacement of the deck near the middle tower while also reducing the torsional buffeting response of the main girder near the side tower.The results can provide a reference for the application of the central buckle on the multiple-tower suspension bridge.
作者
张寒
王浩
姚程渊
陶天友
ZHANG Han;WANG Hao;YAO Chengyuan;TAO Tianyou(Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2021年第3期382-387,共6页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51438002)
国家重点基础研究发展计划青年科学家专题项目(2015CB060000)
国家万人计划青年拔尖人才项目(W03070080).
关键词
三塔悬索桥
刚性中央扣
柔性中央扣
动力特性
抖振性能
数值模拟
有限元方法
时域分析
triple-tower suspension bridge
rigid central buckle
flexible central buckle
dynamic characteristic
buffeting performance
numerical simulation
finite element method
time-domain analysis
