摘要
以某特大跨径桁架加劲梁悬索桥为例,利用节段模型风洞试验,探讨研究桥面板中央开槽孔、加裙板、气动翼扳等各种气动控制措施对颤振临界风速的影响。试验结果表明,桥面板中央开槽、设置裙板、气动翼板都能够使桁架加劲梁桥颤振稳定性得到改善,但是都不能使各个攻角下的颤振临界风速都有所提高。气动翼板和桥面板中央开槽组合气动措施,且气动翼板的安装位置在桁架加劲梁弦杆,是最优化气动措施组合,可为类似大跨度桁架加劲梁桥抗风设计做参考。
Taken a grand long-span suspension bridge with truss girder for example, the influences of various aerodynamie controlling measures such as central-slotting in bridge deck plate, apron board and pneumatic winglets on the critical flutter wind speed of the girder was discussed through sectional model wind tunnel test. The test results indicate that （ 1 ） the flutter stability of bridges with truss girder can be improved by use of central-slotting in bridge deck plate, apron boards and pneumatic winglets, however, any of these measures cannot increase the critical flutter wind speed of the girder at all of angles of attack; （2） the combination of central-slotting in bridge deck plate and pneumatic winglets which is located on stiffening chord is the optimalest one. This research can provide a reference for the wind resistant design of long-span bridge with truss girder.
出处
《公路交通科技》
CAS
CSCD
北大核心
2010年第2期48-53,共6页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金资助项目(50808148)
关键词
桥梁工程
气动优化
风洞试验
节段模型
颤振稳定性
颤振临界风速
气动翼板
bridge engineering
aerodynamic optimization measure
wind tunnel test
segmental model
flutter stability
critical flutter wind speed
pneumatic winglet
