[1]李爱群,丁幼亮,费庆国,等.润扬大桥斜拉桥模态频率识别的环境变异性[J].东南大学学报(自然科学版),2007,37(2):245-250.[doi:10.3969/j.issn.1001-0505.2007.02.013]
 Li Aiqun,Ding Youliang,Fei Qingguo,et al.Environmental variability in modal frequency identification of Runyang Cable-Stayed Bridge[J].Journal of Southeast University (Natural Science Edition),2007,37(2):245-250.[doi:10.3969/j.issn.1001-0505.2007.02.013]
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润扬大桥斜拉桥模态频率识别的环境变异性()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第2期
页码:
245-250
栏目:
土木工程
出版日期:
2007-03-20

文章信息/Info

Title:
Environmental variability in modal frequency identification of Runyang Cable-Stayed Bridge
作者:
李爱群 丁幼亮 费庆国 缪长青
东南大学混凝土及预应力混凝土结构教育部重点实验室,南京 210096
Author(s):
Li Aiqun Ding Youliang Fei Qingguo Miao Changqing
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
斜拉桥 动力特性 环境振动 结构健康监测
Keywords:
cable-stayed bridge dynamic property ambient vibration structural health monitoring
分类号:
TU311.41
DOI:
10.3969/j.issn.1001-0505.2007.02.013
摘要:
为了研究大跨斜拉桥振动特性的环境时变特征,对润扬大桥斜拉桥的实测加速度响应进行了模态参数识别.采用峰值法识别了润扬大桥斜拉桥的主要模态频率,并详细地考察了日常运营条件下实测模态频率的环境变异性.分析结果表明,实际环境条件(交通荷载、环境温度和台风荷载)与斜拉桥实测模态频率存在较为明显的相关关系,主要表现为环境温度的变化对模态频率的影响是长期性的趋势,而交通荷载和风荷载对模态频率的影响则由于荷载的非平稳性呈现瞬时的颤动变化.环境激励下润扬大桥斜拉桥整体振动的模态频率在1天内可以发生约1%~4%的变化,其日平均值在1年中可以发生约1%~2.5%的变化.
Abstract:
In order to investigate the environmental variability in the dynamic properties of long-span Cable-Stayed Bridges, the modal parameters identification of Runyang Cable-Stayed Bridge is performed using the measured acceleration responses. The modal frequencies of the bridge are identified using the peak-picking method and which the environmental variability of the modal frequencies is discussed in detail under daily traffic conditions. The analysis results reveal that the actual environmental conditions including traffic loadings, environmental temperature and typhoon loadings have remarkable correlations with the measured modal frequencies of Runyang Cable-Stayed Bridge. The changes of environmental temperature have a long-term trend influence on the modal frequencies, while the effect of traffic and typhoon loadings on the measured modal frequencies of the bridge presents instantaneous changes because of the nonstationary properties of the loadings. It is indicated that the natural frequencies of vibration modes of the bridge under ambient vibrations vary approximately within 1% to 4% in one day and the average natural frequencies per-day vary approximately within 1% to 2.5% in one year.

参考文献/References:

[1] 李爱群,缪长青,李兆霞,等.润扬长江公路大桥结构健康监测系统研究[J].东南大学学报:自然科学版,2003,33(5):544-548.
  Li Aiqun,Miao Changqing,Li Zhaoxia,et al.Health monitoring system for the Runyang Yangtse River Bridge [J].Journal of Southeast University:Natural Science Edition,2003,33(5):544-548.(in Chinese)
[2] Li A Q,Miao C Q,Zhao L.The health monitoring system of the Runyang Yangtse River Bridge[C] //Proceedings of the First International Conference on Structural Health Monitoring and Intelligent Infrastructure.Tokyo,Japan,2003:1017-1023.
[3] 缪长青,李爱群,韩晓林,等.润扬大桥结构健康监测策略[J].东南大学学报:自然科学版,2005,35(5):780-785.
  Miao Changqing,Li Aiqun,Han Xiaolin,et al.Monitor strategy for the structural health monitoring system of Runyang Bridge[J].Journal of Southeast University:Natural Science Edition,2005,35(5):780-785.(in Chinese)
[4] 丁幼亮,李爱群,缪长青,等.基于小波包能量谱的大跨桥梁结构损伤预警指标[J].中国公路学报,2006,19(5):34-40.
  Ding Youliang,Li Aiqun,Miao Changqing,et al.Structural damage alarming indices for long-span bridges based on wavelet packet energy spectrum[J].China Journal of Highway and Transport,2006,19(5):34-40.(in Chinese)
[5] 郭彤,李爱群,缪长青,等.数值模拟联合算法及其在润扬大桥可靠度评估中的应用[J].土木工程学报,2006,39(9):87-93.
  Guo Tong,Li Aiqun,Miao Changqing,et al.Combined numerical simulation method and its application on the reliability assessment of the Runyang Bridge[J].China Civil Engineering Journal,2006,39(9):87-93.(in Chinese)
[6] James G H,Garne T G..The natural excitation technique(NExT)for modal parameter extraction from ambient operating structure [J]. The International Journal of Analytical and Experimental Modal Analysis,1995,10(4):260-277.
[7] Arici Y L,Mosalam K M.Modal identification of bridge systems using state-space methods[J].Structural Control and Health Monitoring,2005,12(3/4):381-404.
[8] Ni Y Q,Fan K Q,Zheng G,et al.Automatic modal identification and variability in measured modal vectors of a cable-stayed bridge[J].Structural Engineering and Mechanics,2005,19(2):123-139.

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 Zhang Hengping (Departement of Civil Engineering) Shunji Inomata Tetsuhiko Aoki (Aizhi Institute of Technology,Japan).Creep Analysis for Cable Stayed Concrete Bridge during Cantilever-Construction[J].Journal of Southeast University (Natural Science Edition),1988,18(2):105.[doi:10.3969/j.issn.1001-0505.1988.01.012]
[9]颜玉玲,张建周.大跨度拱型结构的动力特性[J].东南大学学报(自然科学版),1987,17(3):1.[doi:10.3969/j.issn.1001-0505.1987.03.001]
 Yah Yuling Zhang Jianzhou (Department of Mathematics and Mechanics).The Dynamic Characteristics of Long Span Arch Structure[J].Journal of Southeast University (Natural Science Edition),1987,17(2):1.[doi:10.3969/j.issn.1001-0505.1987.03.001]
[10]徐祥和,钱一呈.蜗形凸轮转位设备动力特性的计算机解析[J].东南大学学报(自然科学版),1982,12(2):37.[doi:10.3969/j.issn.1001-0505.1982.02.004]
 Xu Xiang-he,and Qian Yi-cheng.Computerized Analysis of Dynamic Characteristics for the Rotary Index Machine with Index Barrel Cam[J].Journal of Southeast University (Natural Science Edition),1982,12(2):37.[doi:10.3969/j.issn.1001-0505.1982.02.004]
[11]丁幼亮,李爱群,韩晓林,等.润扬大桥斜拉桥结构安全评估的有限元建模与修正[J].东南大学学报(自然科学版),2006,36(1):92.[doi:10.3969/j.issn.1001-0505.2006.01.019]
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备注/Memo

备注/Memo:
基金项目: 教育部高等学校科技创新工程重大项目培育资金资助项目(704024)、国家高技术研究发展计划(863计划)资助项目(2006AA04Z416)、国家自然科学基金资助项目(50378017).
作者简介: 李爱群(1962—)男,博士,教授,博士生导师,aiqunli@seu.edu.cn.
更新日期/Last Update: 2007-03-20