[1]吴佰建,李兆霞,王滢,等.桥梁结构动态应变监测信息的分离与提取[J].东南大学学报(自然科学版),2008,38(5):767-773.[doi:10.3969/j.issn.1001-0505.2008.05.006]
　Wu Baijian,Li Zhaoxia,Wang Ying,et al.Separation and extraction of bridge dynamic strain data[J].Journal of Southeast University (Natural Science Edition),2008,38(5):767-773.[doi:10.3969/j.issn.1001-0505.2008.05.006]
点击复制

桥梁结构动态应变监测信息的分离与提取()
分享到：

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第5期
页码:
767-773
栏目:
交通运输工程
出版日期:
2008-09-20

文章信息/Info

Title:
Separation and extraction of bridge dynamic strain data
作者:
吴佰建1;  李兆霞1;  王滢1;  T.H.T.Chan2
1 东南大学土木工程学院, 南京 210096; 2 香港理工大学土木及结构工程系,香港
Author(s):
Wu Baijian1;  Li Zhaoxia1;  Wang Ying1;  T.H.T. Chan2
1 School of Civil Engineering, Southeast University, Nanjing 210096,China
2 Department of Civil and Structural Engineering, Hong Kong Polytechnic University, Hong Kong, China
关键词:
结构健康监测;  结构应变;  信息分离;  信息提取;  疲劳评估
Keywords:
structural health monitoring(SHM);  structural strain;  information separation;  information extraction;  fatigue assessment
分类号:
U441
DOI:
10.3969/j.issn.1001-0505.2008.05.006
摘要:
对工作应变传感器和温度应变传感器的数据进行了对比分析,利用能量谱比指标将监测系统输出的原始应变数据按照温度、应力和测量噪声3种类型在频域中进行分类,分别确定了温度变形与结构应变的分界频率.提出了一个多分辨递阶方法, 可将3类不同信息分离并提取出由结构应力导致的应变信息,在分离信息基础上考察了干扰部分和温度应力部分对疲劳评估的影响.研究结果表明,2个分界频率值对同类桥梁有较强的参考价值,提出的算法具有多分辨和递阶的特征,适合于海量应变数据的压缩与预处理,便于在结构健康监测系统软件中集成.虽然变温变形部分的能量很大,但其对疲劳评估产生的误差很小; 而干扰信息虽然能量很小,但对疲劳评估产生的影响很大,其主要原因是干扰信息使得应力应变中提取的应变幅发生偏移.
Abstract:
Through comparing the measured data of dynamic strains due to loading and temperature by the strain gauge and temperature sensor at the same location, the information in the strain data was divided into three parts in the frequency domain by using the defined index named PSD(power spectral density)-ratio. The three parts are dominated respectively by temperature varying, stresses and noises and can be distinguished from the determined values of the separatrix frequencies. Then a simple algorithm was developed to separate the three types of information, and to extract the strain caused mainly by structural stresses. As an application of the proposed method, the influence of strain deformation and noises on the fatigue assessment was investigated based on the separated data. The results show that, the determined values of separatrix frequencies are valuable for the monitoring data from other bridges. The algorithm is a multi resolution and hierarchical method, which has been validated as a simple and effective method for data analyses, and is suitable for the compression and preprocessing of the great amount monitoring data and easy to be integrated into the SHM’s(structural health monitoring)software system. The strain due to temperature varying attributes only a little to the errors of fatigue assessment, however, the noises or random disturbance existed in the monitoring data have much responsibility for the errors, the main reason is that the random disturbance shifts the real strain/stress amplitude picked up by real structural stress or strain.

参考文献/References:

[1] Sohn H,Farar C R,Hemez F M,et al.A review of structural health monitoring:1996—2001 [R].Los Alamos:Los Alamos National Laboratory,2003.
[2] Chang P C,Flatau A,Liu S C.Health monitoring of civil infrastructure [J].Structural Health Monitoring,2003,2(3):257-267.
[3] Li Z X,Chan T H T,Ko J M.Fatigue analysis and life prediction of bridges with structural health monitoring data Part Ⅰ:methodology and strategy [J]. International Journal of Fatigue,2001,23(1):45-53.
[4] Chan T H T,Li Z X,Ko J M.Fatigue analysis and life prediction of bridges with structural health monitoring data part Ⅱ:applications [J].International Journal of Fatigue,2001,23(1):55-64.
[5] 郑蕊,李兆霞.基于结构健康监测系统的桥梁疲劳寿命可靠性评估 [J].东南大学学报:自然科学版,2001,31(6):71-73.
　 Zheng Rui,Li Zhaoxia.Reliable evaluation of bridge fatigue life based on structural health monitoring system [J].Journal of Southeast University:Natural Science Edition,2001,31(6):71-73.(in Chinese)
[6] 郭建,顾正维.基于小波分析的桥梁健康监测方法 [J].工程力学,2006,23(12):129-135.
　 Guo Jian,Gu Zhengwei.Method of bridge health monitoring based on wavelet analysis [J]. Engineering Mechanics,2006,23(12):129-135.(in Chinese)
[7] Lau C K,Wong K Y,Chan W Y K,et al.The structural health monitoring system and structural health monitoring of cable-supported bridges [C] //Proceedings of the International Conference on Current and Future Trends in Bridge Design Construction and Maintenance.Singapore,1999:3-14.
[8] Downing S,Socie D F.Simple rainflow counting algorithms [J]. International Journal of Fatigue,1982,11(4):31-40.
[9] Richlik I.A new definition of the rainflow cycle counting method [J]. International Journal of Fatigue,1987,22(9):119-121.
[10] British Standards Institution.BS5400:part 10,code of practice for fatigue [S].London:BSI,1980.

相似文献/References:

[1]滕军,卢伟.基于多类型传感器信息的结构损伤识别方法[J].东南大学学报(自然科学版),2010,40(3):538.[doi:10.3969/j.issn.1001-0505.2010.03.020]
　Teng Jun,Lu Wei.Structural damage identification method based on multi-type sensors[J].Journal of Southeast University (Natural Science Edition),2010,40(5):538.[doi:10.3969/j.issn.1001-0505.2010.03.020]
[2]丁幼亮,王晓晶,王高新,等.珠江黄埔大桥钢箱梁温度长期监测与分析[J].东南大学学报(自然科学版),2012,42(5):945.[doi:10.3969/j.issn.1001-0505.2012.05.027]
　Ding Youliang,Wang Xiaojing,Wang Gaoxin,et al.Long-term temperature monitoring and analysis of steel box girders of Pearl River Huangpu Bridge[J].Journal of Southeast University (Natural Science Edition),2012,42(5):945.[doi:10.3969/j.issn.1001-0505.2012.05.027]
[3]孙正华,李兆霞,陈鸿天.结构行为一致多尺度有限元模型修正及验证[J].东南大学学报(自然科学版),2009,39(1):85.[doi:10.3969/j.issn.1001-0505.2009.01.016]
　Sun Zhenghua,Li Zhaoxia,Chan Hungtin Tommy.Updating and verification for multi-scale finite element model of structure behavior[J].Journal of Southeast University (Natural Science Edition),2009,39(5):85.[doi:10.3969/j.issn.1001-0505.2009.01.016]
[4]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.[doi:10.3969/j.issn.1001-0505.2005.05.027]
　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.[doi:10.3969/j.issn.1001-0505.2005.05.027]
[5]邓扬,李爱群,丁幼亮,等.基于长期监测数据的大跨桥梁结构伸缩缝损伤识别[J].东南大学学报(自然科学版),2011,41(2):336.[doi:10.3969/j.issn.1001-0505.2011.02.024]
　Deng Yang,Li Aiqun,Ding Youliang,et al.Damage identification of expansion joints in long span bridge using long-term monitoring data[J].Journal of Southeast University (Natural Science Edition),2011,41(5):336.[doi:10.3969/j.issn.1001-0505.2011.02.024]
[6]丁幼亮,李爱群,耿方方.考虑环境因素影响的悬索桥整体状态预警方法[J].东南大学学报(自然科学版),2010,40(5):1052.[doi:10.3969/j.issn.1001-0505.2010.05.032]
　Ding Youliang,Li Aiqun,Geng Fangfang.Monitoring and warning of health conditions for suspension bridges under varying environmental conditions[J].Journal of Southeast University (Natural Science Edition),2010,40(5):1052.[doi:10.3969/j.issn.1001-0505.2010.05.032]
[7]周广东,等.基于实测数据的润扬大桥悬索桥全寿命评估随机温度场模拟[J].东南大学学报(自然科学版),2013,43(5):912.[doi:10.3969/j.issn.1001-0505.2013.05.002]
　Zhou Guangdong,Li Aiqun,et al.Simulation of stochastic temperature field for Runyang suspension bridge life-cycle evaluation based on monitoring data[J].Journal of Southeast University (Natural Science Edition),2013,43(5):912.[doi:10.3969/j.issn.1001-0505.2013.05.002]
[8]丁幼亮,王超,王景全,等.高速铁路钢桁拱桥吊杆振动长期监测与分析[J].东南大学学报(自然科学版),2016,46(4):848.[doi:10.3969/j.issn.1001-0505.2016.04.029]
　Ding Youliang,Wang Chao,Wang Jingquan,et al.Long-term monitoring and analysis of hanger vibration on high-speed railway steel truss arch bridge[J].Journal of Southeast University (Natural Science Edition),2016,46(5):848.[doi:10.3969/j.issn.1001-0505.2016.04.029]

备注/Memo

备注/Memo:
作者简介: 吴佰建(1983—),男,硕士生; 李兆霞(联系人),女,博士,教授,博士生导师,zhxli@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(10672038).
引文格式: 吴佰建,李兆霞,王滢,等.桥梁结构动态应变监测信息的分离与提取[J].东南大学学报:自然科学版,2008,38(5):767-773.
更新日期/Last Update: 2008-09-20