| 既有桥墩动力特性分析及其状态评估 |
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| 引用本文： | 刘保东,刘汉夫. 既有桥墩动力特性分析及其状态评估[J]. 公路交通科技, 2006, 23(6): 95-97 |
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| 作者姓名： | 刘保东 刘汉夫 |
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| 作者单位： | 1. 北京交通大学,土木建筑工程学院,北京,100044
2. 铁道科学研究院,铁道建筑研究所,北京,100081 |
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| 基金项目： | 交通部西部交通科技资助项目(200431800058) |
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| 摘 要： | 桥墩在使用荷载和环境因素的综合影响下,其实际状态会随时间发生一定程度的改变,造成桥墩动力特性的变化。基于对实际既有桥墩现状的调查和分析,按照相关规范的规定,用有限元方法建模计算了桥墩基于现状的完整、健康状态下的自振频率,并应用自然脉动法现场实际测量了桥墩的自振频率。通过计算频率与实测频率的对比,应用健全度指标法对桥墩进行了状态评估。计算和分析结果表明,文章提出的计算和评估方法是合理的,评估结果反应既有桥墩的实际状态,可以为采取相应的措施提供有价值的参考。
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| 关 键 词： | 桥墩 状态评估 振动 动力特性 脉动法 |
| 文章编号： | 1002-0268(2006)06-0095-03 |
| 收稿时间： | 2005-10-26 |
| 修稿时间： | 2005-10-26 |
Dynamic Characteristic Analysis and Performance Evaluation of the Existing Piers |
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| LIU Bao-dong,LIU Han-fu. Dynamic Characteristic Analysis and Performance Evaluation of the Existing Piers[J]. Journal of Highway and Transportation Research and Development, 2006, 23(6): 95-97 |
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| Authors: | LIU Bao-dong LIU Han-fu |
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| Affiliation: | 1. College of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China; 2. Railway Engineering Research Institute, Academy of Railway Science, Beijing 100081, China |
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| Abstract: | Under the influence of the load and the environment,the performance of the piers is varying during its service life.Thereby the dynamic characteristics of the piers are changed.Based on the investigation and analysis of the actual state of some existing piers,the Finite Element models are established according to the relative standards and the frequencies of the present undamaged piers are calculated.Comparing with the actual measured data derived by the natural pulsating method,the performance of the existing piers is evaluated by Healthiness Index Method.The calculated and analytical results show that the proposed calculation and evaluation methods are rational and feasible.The evaluation results show the actual performance of the pier and can be a valuable reference for taking required measures. |
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| Keywords: | piers performance evaluation vibration dynamic characteristics pulsating method |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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