摘要
为解决5 000 m超大跨径海峡悬索桥的抗风稳定性问题,文中提出双曲抛物面空间混合缆索体系的超大跨径悬索桥。平行钢丝缆索承担竖向荷载,双曲抛物面形碳纤维空间缆索提高悬索桥的抗扭刚度,启用临时抗风缆索抵御百年一遇超级强台风。研究表明,5 000 m级双曲抛物面空间混合缆索悬索桥的颤振临界校验风速为71.78 m/s,启用临时辅助抗风缆后,颤振临界风速数值可以达到104.5 m/s,可从根本上解决5 000 m级超大跨径悬索桥的抗风稳定性问题。
In order to solve the problem of wind stability of 5 000 m super long-span strait suspension bridge, a super long-span suspension bridge with hyperbolic paraboloid space hybrid cable system is proposed in this paper. The parallel steel cable bears the vertical load, the hyperbolic paraboloid carbon fiber space cable improves the torsional stiffness of the suspension bridge, and the temporary wind resistant cable is used to resist the once-in-a-century super strong typhoon. The research shows that the flutter critical verification wind speed of 5 000 m hyperbolic paraboloid space hybrid cable suspension bridge is 71.78 m/s. After using the temporary auxiliary wind resistant cable, the flutter critical wind speed can reach 104.5 m/s, which can fundamentally solve the problem of wind resistance stability of 5 000 m super long-span suspension bridge, and provide a scientific basis for the construction of 5 000 m strait suspension bridge.
作者
王国华
李兵
徐文平
秦韬睿
WANG Guohua;LI Bing;XU Wenping;QIN Taorui(Jiangsu Traffie Engineering Consulting and Supervision Ca.,Ltd.,Nanjing 211800,China;College of Civil Engineering,Southeast Univrsity,Nanjing 211189,China)
出处
《交通科技》
2022年第2期42-46,共5页
Transportation Science & Technology
基金
江苏省自然科学基金(BK2012755)资助。
关键词
超大跨径海峡悬索桥
空间混合缆索
双曲抛物面
动力模态
抗风稳定性
super-long-span strait suspension bridge
spatial mixed cable
hyperbolic paraboloid
dynamic modal
wind stability
