| 斜独塔混合梁斜拉桥风-汽车-桥梁系统耦合振动研究 |
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| 引用本文： | 李永乐,赵凯,吴梦雪,廖海黎.斜独塔混合梁斜拉桥风-汽车-桥梁系统耦合振动研究[J].中国公路学报,2012,25(1):47-54. |
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| 作者姓名： | 李永乐 赵凯 吴梦雪 廖海黎 |
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| 作者单位： | 1. 西南交通大学桥梁工程系,四川成都,610031
2. 西南交通大学桥梁工程系,四川成都610031／中交公路规划设计院有限公司,北京100088 |
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| 基金项目： | 国家自然科学基金项目(50508036,90915006);教育部新世纪优秀人才支持计划项目(NCET-06-0802);四川省杰出青年学科带头人计划项目(20092152406);西南交通大学科技发展基金项目(2005A05) |
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| 摘 要： | 针对公路汽车三维绕流特性显著的特点,按照准定常理论推导了适用于公路汽车的脉动风荷载表达式。将自然风、公路汽车、桥梁作为一个统一的相互作用系统,采用风-汽车-桥梁系统耦合振动分析模型,以某斜独塔混合梁斜拉桥为工程背景,研究侧风作用下汽车-桥梁耦合振动特性,并讨论了汽车-桥梁振动的影响因素。研究结果表明：由于桥梁和汽车的气动特性差异,桥梁的竖向抖振现象较横向抖振现象突出,而汽车的横向振动现象较竖向振动更明显。
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| 关 键 词： | 桥梁工程 风-汽车-桥梁系统 准定常理论 耦合 独塔斜拉桥 |
Study of Coupling Vibration of Wind-vehicle-bridge System for Inclined Single Pylon Cable-stayed Bridge with Hybrid Girder |
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| LI Yong-le,ZHAO Kai,WU Meng-xue,LIAO Hai-li.Study of Coupling Vibration of Wind-vehicle-bridge System for Inclined Single Pylon Cable-stayed Bridge with Hybrid Girder[J].China Journal of Highway and Transport,2012,25(1):47-54. |
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| Authors: | LI Yong-le ZHAO Kai WU Meng-xue LIAO Hai-li |
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| Institution: | 1(1.Department of Bridge Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China; 2.CCCC Highway Consultants Co.,Ltd.,Beijing 100088,China) |
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| Abstract: | A wind load formula for road vehicle which is distinct for the feature of three-dimensional flow was derived based on the quasi-steady theory.Taking natural wind,road vehicle and bridge as unified interaction system,an improved coupling vibration analysis model of wind-vehicle-bridge system was established.In the case study,an inclined single pylon cable-stayed bridge with hybrid girder was explored to investigate the coupling vibration characteristics of vehicle-bridge system under cross wind.Results show that vertical vibration is dominant over transverse vibration for the bridge while transverse vibration is more obvious than vertical vibration for the vehicles due to different aerodynamic characteristics of vehicle and bridge. |
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| Keywords: | bridge engineering wind-vehicle-bridge system quasi-steady theory coupling single pylon cable-stayed bridge |
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