摘要
以宜宾长江大桥为工程背景,针对其H形桥塔采用底座天平进行了独塔状态下的测力试验,发展了基于塔底气动力推算塔柱断面气动力系数的近似方法,讨论了桥塔气动力的雷诺数效应及不同风向角情况下两塔柱间相互的气动干扰,桥塔气动力的测试结果将为该桥的抗风设计提供参数。结果表明,气动力系数整体随风速增大而略有减小,不同风向角情况下两塔柱间的气动干扰效应较为明显。
Yibin Yangze River Bridge is regarded as a typical example in this paper. Aerodynamic force on a H-shape pylon has been measured in wind tunnel by a balance installed under the pylon. The approximate method is developed to obtain the aerodynamic coefficients of pylon column section on the basis of aerodynamic forces at the bottom of the pylon. The effects of Reynolds number on aerodynamic forces is investigated and the aerodynamic interaction between two pylon columns at various yaw angles is discussed. The measured aerodynamic coefficients can be applied in the wind-resistant design. It is shown that the aerodynamic coefficients slightly decrease with the increase in wind speed, and the aerodynamic interference between two pylon columns at different yaw angles is obvious.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第13期64-68,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50508036
50778155)
教育部新世纪优秀人才支持计划(NCET-06-0802)
西南交通大学科技发展基金(2005A05)
四川省交通厅科技计划项目(SC20050042)
关键词
斜拉桥
H形桥塔
风洞试验
气动力系数
气动干扰
cable-stayed bridge
H-shape pylon
wind tunnel test
aerodynamic coefficient
aerodynamic interference
