潜江铁路支线岳口汉江特大桥抗风性能研究
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摘要
潜江铁路支线岳口汉江特大桥主桥为(32.7+50+93.7+260+38.2)m独塔双索面混合梁斜拉桥,半漂浮结构体系。主梁采用钢-混混合梁形式,钢箱梁与混凝土梁均为单箱三室截面。论文利用数值风洞技术模拟了桥梁断面的三分力系数,从结构动力特性、颤振稳定性分析、抖振振幅估算等方面研究了该桥在成桥运营状态和施工状态的抗风性能。
The main bridge of Yuekou Hanjiang Bridge on Qianjiang Railway Branch Line is a cable-stayed bridge with single tower,double cable planes and with span arrangement(32.7+50+93.7+260+38.2) m, and it is designed into the one of the semi-floating structural system. The main girder is in the form of steel-concrete composite beam. The steel box girder and concrete beam are single-box three-chamber sections. In this paper, numerical wind tunnel technology is used to simulate the aerodynamic coefficients of bridge section.The wind resistance performance of the bridge in the operation state and construction state of the bridge is studied from the aspects of structural dynamic characteristics, flutter stability analysis and buffeting amplitude estimation.
The main bridge of Yuekou Hanjiang Bridge on Qianjiang Railway Branch Line is a cable-stayed bridge with single tower,double cable planes and with span arrangement(32.7+50+93.7+260+38.2) m, and it is designed into the one of the semi-floating structural system. The main girder is in the form of steel-concrete composite beam. The steel box girder and concrete beam are single-box three-chamber sections. In this paper, numerical wind tunnel technology is used to simulate the aerodynamic coefficients of bridge section.The wind resistance performance of the bridge in the operation state and construction state of the bridge is studied from the aspects of structural dynamic characteristics, flutter stability analysis and buffeting amplitude estimation.
引文
[1]JTG/T D60-01-2018公路桥梁抗风设计规范[S].
[2]陈艾荣,项海帆,何宪飞,等.桥梁断面18个颤振导数自由振动识别[J].同济大学学报(自然科学版),2002(5):544-550.
[3]牛华伟,陈政清.桥梁主梁断面18个颤振导数识别的三自由度强迫振动法[J].土木工程学报,2014,47(4):75-83.
[4]王骑,李郁林,李志国,等.不同风攻角下薄平板的颤振导数[J].工程力学,2018,35(10):10-16.
[5]王黎明.基于CFD数值模拟对大跨桥梁主梁断面颤振研究[J].公路工程,2017,42(5):322-326.
[2]陈艾荣,项海帆,何宪飞,等.桥梁断面18个颤振导数自由振动识别[J].同济大学学报(自然科学版),2002(5):544-550.
[3]牛华伟,陈政清.桥梁主梁断面18个颤振导数识别的三自由度强迫振动法[J].土木工程学报,2014,47(4):75-83.
[4]王骑,李郁林,李志国,等.不同风攻角下薄平板的颤振导数[J].工程力学,2018,35(10):10-16.
[5]王黎明.基于CFD数值模拟对大跨桥梁主梁断面颤振研究[J].公路工程,2017,42(5):322-326.