摘要
斜拉桥结构的复杂性和特殊性,使得结构对风十分敏感,在风荷载作用下的响应一直是工程实践中的重要问题。以某预应力混凝土双塔双索面斜拉桥为背景,通过改变梁索塔结合方式得到半飘浮和飘浮体系,对其动力特性和抗风稳定性进行分析比较。通过建立全桥有限元模型进行动力特性分析,得到自振频率及振型等参数,然后进行抗风稳定性分析。可知无论是飘浮体系还是半飘浮体系,在成桥状态下都十分安全,且飘浮体系抗风性能优于半飘浮体系,为同类双塔双索面斜拉桥抗风分析提供了有效的分析方法。
The structure of Cable-stayed Bridge is complexity and specificity,making the bridge is sensitive to the wind,the response of the wind loads has always been an important issue in engineering practice.Taking a prestressed concrete cable-stayed bridge with double pylons and doublecable planes as an example.To analyses and compare dynamic property and wind-resistant stability withfloating system and semi-floating system which was achieved by changingthe binding modes of the girder and the bridge towers.Three-dimensional finite models for a prestressed concrete cable-stayed bridge with double pylons and double cable planes were established in this paper.The parameters can be obtained from the analysis,such as natural frequency and the vibration mode.And the wind-resistant stability is studied.On the basis of the above analysis results,whether floating bridge system or semi-floating system,the whole bridge is safe,and the wind-resistant stability performance of the floating system is superior to the wind-resistant stability performance of semi-floating system,the study can provide valuable efficient method for wind-resistant stability analysis of Cable-stayed Bridge with double pylons and double cable planes.
出处
《南阳理工学院学报》
2013年第3期70-74,共5页
Journal of Nanyang Institute of Technology
关键词
双塔双索面斜拉桥
半飘浮体系
飘浮体系
抗风稳定性
cable-stayed bridge with double pylons and double cable planes
semi-floating system
floating system
wind resistant stability
