| 自由交通流作为环境振源对斜拉桥动力特性测试 |
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| 引用本文： | 王新岐,杨晓蓉.自由交通流作为环境振源对斜拉桥动力特性测试[J].中国市政工程,2008(5):18-20. |
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| 作者姓名： | 王新岐 杨晓蓉 |
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| 作者单位： | 1. 天津市政工程设计研究院,天津,300051
2. 军事交通学院基础部,天津,300161 |
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| 摘 要： | 以自由交通流作为环境振源对斜拉桥动力特性进行测试,是桥梁模态参数识别未来健康诊断的必然趋势。介绍了利用车辆随机激振测试永和斜拉桥的自振特性的原理及具体实施方法,并对其使用15a后的模态参数进行了识别。该方法避免了由于禁止车辆通行、采样时间长等问题给环境随机振动测试带来的困难。其测试数据可以作为斜拉桥破损状态下的动力指纹。
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| 关 键 词： | 斜拉桥 自由交通流 振动测试 模态参数 |
Free Traffic Flows Used for Environmental Vibration Source in Testing Dynamic Characteristics of Cable-stayed Bridges |
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| WANG Xin-qi,YANG Xiao-rong.Free Traffic Flows Used for Environmental Vibration Source in Testing Dynamic Characteristics of Cable-stayed Bridges[J].China Municipal Engineering,2008(5):18-20. |
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| Authors: | WANG Xin-qi YANG Xiao-rong |
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| Affiliation: | 1. Tianjin Municipal Engineering Design and Research Institute;Tianjin 300051;China;2. Dept. of Basic Courses;Academy of Military Transportation;Tianjin 300161;China |
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| Abstract: | Free traffic flows are used for environmental vibration source to test the dynamic characteristics of Yonghe Cable-stayed Bridge, which is a trend to identify future diagnosis of the bridge with the modal parameters. Mechanism and specific methods are given hereby to test the auto-vibration characteristics of that bridge using vibration excited by vehicles at random, and its modal parameters are identified after its service for 15 years. This method can avoid problems by the test like traffic interruption a... |
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| Keywords: | cable-stayed bridge free traffic flow vibration test modal parameter |
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