[1]刘涛,李爱群,丁幼亮.基于小波包能量谱的大跨斜拉桥拉索损伤预警方法[J].东南大学学报(自然科学版),2007,37(2):270-274.[doi:10.3969/j.issn.1001-0505.2007.02.017]
 Liu Tao,Li Aiqun,Ding Youliang.Alarming method for cable damage of long-span cable-stayed bridges based on wavelet packet energy spectrum[J].Journal of Southeast University (Natural Science Edition),2007,37(2):270-274.[doi:10.3969/j.issn.1001-0505.2007.02.017]
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基于小波包能量谱的大跨斜拉桥拉索损伤预警方法()
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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:
270-274
栏目:
土木工程
出版日期:
2007-03-20

文章信息/Info

Title:
Alarming method for cable damage of long-span cable-stayed bridges based on wavelet packet energy spectrum
作者:
刘涛 李爱群 丁幼亮
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):
Liu Tao Li Aiqun Ding Youliang
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Nanjing 210096, China
关键词:
小波包能量谱 大跨斜拉桥 拉索损伤
Keywords:
wavelet packet energy spectrum long-span cable-stayed bridges cable damage
分类号:
TU311.41
DOI:
10.3969/j.issn.1001-0505.2007.02.017
摘要:
为了实现对大跨斜拉桥拉索损伤的有效预警,将小波包分析应用于结构损伤预警中.在基于小波包能量谱的结构损伤预警理论的基础上,提出了大跨斜拉桥拉索损伤的预警方法,并以润扬大桥斜拉桥为例,研究了这种方法的损伤适用性和损伤敏感性.数值分析结果表明,与频率等动力参数相比,采用基于小波包能量谱的结构损伤预警指标能更有效地发现大跨斜拉桥拉索的早期损伤,且通过对多测点损伤预警指标的分析与比较能初步实现拉索的损伤定位.可见,该结构损伤预警方法具有实用性,对结构损伤定位亦有帮助.
Abstract:
For the purpose of improving validity of cable damage alarming of long-span cable-stayed bridges, wavelet packet analysis is imported into structural damage alarming methods. On the basis of the structural damage alarming theory based on wavelet packet energy spectrum, the damage alarming method for cable damage of long-span cable-stayed bridges is put forward in this paper. Through the Runyang cable-stayed bridge, damage alarming capacity of the presented method is discussed in detail with respect to damage location and damage extent. The analysis results reveal that, compared with other dynamic parameters, such as frequency, initial cable damages can be detected more effectively and more efficiently by the damage alarming index based on wavelet packet energy spectrum, and determination of the cable damage location can be tentatively realized according to the comparisons of damage alarming indices measured in various locations. Therefore, the structural damage alarming method put forward in this paper is practical and helpful for structural damage localization.

参考文献/References:

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相似文献/References:

[1]丁幼亮,李爱群,邓扬.面向结构损伤预警的小波包能量谱识别参数[J].东南大学学报(自然科学版),2011,41(4):824.[doi:10.3969/j.issn.1001-0505.2011.04.032]
 Ding Youliang,Li Aiqun,Deng Yang.Parameters for identification of wavelet packet energy spectrum for structural damage alarming[J].Journal of Southeast University (Natural Science Edition),2011,41(2):824.[doi:10.3969/j.issn.1001-0505.2011.04.032]

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)、东南大学优秀博士学位论文基金资助项目(0705).
作者简介: 刘涛(1979—),男,博士生; 李爱群(联系人),男,博士,教授,博士生导师, aiqunli@sina.com.
更新日期/Last Update: 2007-03-20