环境激励下大跨悬索桥实测损伤预警指标的变异性

邓扬; 李爱群; 丁幼亮

doi:10.13409/j.cnki.jdpme.2013.06.002

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环境激励下大跨悬索桥实测损伤预警指标的变异性

综述 | 更新时间：2025-12-11

- 环境激励下大跨悬索桥实测损伤预警指标的变异性
- Variability of Measured Damage Alarming Index of a Long-span Suspension Bridge under Ambient Excitation
- 防灾减灾工程学报 2013年33卷第6期页码：624-630
- 作者机构：
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目（51308073、51378081）;教育部博士点新教师基金项目（20124316120002）;桥梁工程安全控制省部共建教育部重点实验室开放基金重点项目（12KB02）;湖南省自然科学青年基金项目（14JJ3087）资助
- DOI：10.13409/j.cnki.jdpme.2013.06.002
  中图分类号： 448.25;U441
- 纸质出版：2013
- 稿件说明：
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[1]邓扬,李爱群,丁幼亮.环境激励下大跨悬索桥实测损伤预警指标的变异性[J].防灾减灾工程学报,2013,33(06):624-630.

邓扬, 李爱群, 丁幼亮. Variability of Measured Damage Alarming Index of a Long-span Suspension Bridge under Ambient Excitation[J]. 2013, 33(6): 624-630.
[1]邓扬,李爱群,丁幼亮.环境激励下大跨悬索桥实测损伤预警指标的变异性[J].防灾减灾工程学报,2013,33(06):624-630. DOI： 10.13409/j.cnki.jdpme.2013.06.002.

邓扬, 李爱群, 丁幼亮. Variability of Measured Damage Alarming Index of a Long-span Suspension Bridge under Ambient Excitation[J]. 2013, 33(6): 624-630. DOI： 10.13409/j.cnki.jdpme.2013.06.002.

摘要

基于小波包分析技术从悬索桥的加速度振动响应中提取出小波包能量比

进而定量地分析了由环境激励所引起的实测小波包能量比的变异性。首先

采用多样本平均技术消除了由识别算法所带来的小波包能量比的固有随机性

得到了小波包能量比的日平均值;其次

通过建立季节相关性模型得到了温度对小波包能量比影响的定量评价;最后

分别建立交通荷载和风与小波包能量比的相关性模型

并定量评价了交通荷载和风对小波包能量比的影响。分析结果表明

温度和固有随机性是小波包能量比变异性的最主要来源

而交通荷载和风所引起的变异性较小。由于温度和小波包能量比的季节相关性模型可以有效地消除温度和固有随机性对小波包能量比的影响

因此当季节相关性模型偏离这种正常状态的模型时

就可以对悬索桥做出损伤预警。

Abstract

This paper addresses the quantitative evaluation of environmental variability of wavelet packet energy spectrum（WPES）extracted from the ambient dynamic responses of a suspension bridge using wavelet packet transform（WPT）.The daily averaged WPES are first obtained to eliminate the inherent randomness arising from the identification algorithm.Then the effect of temperature on the measured WPES is quantified using the seasonal correlation models.The traffic-induced and wind-induced variability are further quantitatively evaluated by the traffic-WPES and wind-WPES correlation models.The results reveal that temperature and inherent randomness are the governing sources of WPES variability.And the WPES variability caused by wind speed and traffic loadings is negligible compared to temperature and inherent randomness.Considering seasonal correlation models of temperature-WPES can effectively eliminate the temperature effect and inherent randomness

so it is suitable for structural damage alarming of long-span bridges if future seasonal correlation models deviate from these normal models.

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references

苏通大桥结构健康状态评估技术研究与应用（2）:主梁损伤预警 [J]. 李爱群,丁幼亮,邓扬,姚蓓,杨军,周建华. 防灾减灾工程学报 . 2010(03)

环境激励下基于小波包分析的结构损伤预警方法 [J]. 丁幼亮,李爱群,缪长青. 应用力学学报 . 2008(03)

基于小波包能量谱的结构损伤预警方法研究 [J]. 丁幼亮,李爱群,缪长青. 工程力学 . 2006(08)

Research on seasonal correlation of wavelet packet energy spectrum and temperature of Runyang Suspension Bridge [J] . YouLiang Ding,AiQun Li,Jun Sun,Yang Deng. Science in China Series E: Technological Sciences . 2009 (6)

Environmental variability study on the measured responses of Runyang Cablestayed Bridge using wavelet packet analysis [J] . YouLiang Ding,AiQun Li,Tao Liu. Science in China Series E: Technological Sciences . 2008 (5)

Statistical Wavelet-Based Method for Structural Health Monitoring [J] . Z. Sun,C. C. Chang. Journal of Structural Engineering . 2004 (7)

Traffic‐induced variability in dynamic properties of cable‐stayed bridge [J] . Q. W.Zhang,L. C.Fan,W. C.Yuan. Earthquake Engng. Struct. Dyn. . 2002 (11)

Structural Damage Assessment Based on Wavelet Packet Transform [J] . Z. Sun,C. C. Chang. Journal of Structural Engineering . 2002 (10)

Online detection of crack damage in composite plates using embedded piezoelectric actuators/sensors and wavelet analysis [J] . Y.J. Yan,L.H. Yam. Composite Structures . 2002 (1)

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