大跨度斜拉桥模态频率的环境影晌因素研究

doi:10.3969/j.issn.1674-0696.2013.06.02

重庆交通大学学报（自然科学版） ›› 2013, Vol. 32 ›› Issue (6): 1106-1110.DOI: 10.3969/j.issn.1674-0696.2013.06.02

大跨度斜拉桥模态频率的环境影晌因素研究

孙利民¹，周毅¹，谢大圻²

1.同济大学土木工程防灾国家重点实验室，上海 200092;2.上海东海大桥管理有限公司，上海 201308

收稿日期:2013-03-15 修回日期:2013-07-01 出版日期:2013-12-15 发布日期:2015-01-22
作者简介:孙利民(1963—)，男，内蒙古包头人，教授，博士生导师，博士，主要从事结构健康监测与振动控制方面的研究。E-mail:lmsun@ tongji.edu.cn
基金资助:
国家重点基础研究发展(973 )计划(2013 CB036305 )

Environmental Effects on Modal Frequency of Long-Span Cable-Stayed Bridges

Sun Limin¹, Zhou Yi¹, Xie Daqi²

1.State Key Laboratory for Disaster Reduction of Civil Engineering , Tongji University , Shanghai 200092 , China; 2.Shanghai Donghai Blidge Management Co.Ltd., Shanghai 201308 , China

Received:2013-03-15 Revised:2013-07-01 Online:2013-12-15 Published:2015-01-22

摘要/Abstract

摘要： 利用东海大桥结构健康监测系统自2007年以来的风速、温度和加速度数据，研究了环境/荷载因素对东海大桥主航道斜拉桥模态频率的影响规律。结果显示:强风、车辆荷载、温度作用对结构的模态频率均有明显的影响，且影响的时间尺度并不相同一一风对频率的影响主要体现在强风期间，车辆荷载则主要在l周、l天、12h的周期上影响频率，温度作用主要在1年、1天的周期上影响频率;车辆荷裁和风荷载很可能通过振动强度(以加速度RMS 值表征)的变化间接影响频率;明确的机理仍有待进一步研究。

关键词: 结构健康监测, 模态频率, 环境因素

Abstract: Based on the data of anemometer , thermometer and accelerometer accumulated from the Donghai Bridge Structural Health Monitoring System (DBSHMS) since 2007 , the correlation between the environmental or loading factors and the lower order modal frequencies of the main navigational channel blidge (MNCB) of Donghai Bridge was investigated. The results show that the strong wind , traffic loading and structural temperature have significant effects on the frequency variation , and these three factors dominate in different time scales. Compared with traffic and temperature factors , wind effects on frequency happen in a much shorter period , i. e. only during the strong wind process. Traffic load affects the frequency mainly in such cycles as 1 week , 1 day and maybe also 12 hours , while temperature dominates in the cycles like 1 year and 1 day. Traffic and wind loading may inf1uence the frequency in an indirect way by changing the vibration amplitude , and the explicit mechanism needs to be further studied.

Key words: structural health monitoring, modal frequency, environmental factors

中图分类号:

TU311

孙利民，周毅，谢大圻. 大跨度斜拉桥模态频率的环境影晌因素研究[J]. 重庆交通大学学报（自然科学版）, 2013, 32(6): 1106-1110.

Sun Limin , Zhou Yi , Xie Daqi. Environmental Effects on Modal Frequency of Long-Span Cable-Stayed Bridges[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(6): 1106-1110.

参考文献

[1] Xia Y,Chen B,Weng S,et al.Temperature effect on vibration properties of civil structures:a literature review and case studies[J].Journal of Civil Structural Health Monitoring,2012,2(1):29-46.
[2] Abe M,Fujino Y,Yanagihara M,et al.Monitoring of hakucho suspension bridge by ambient vibration measurement[C]//Aktan A E,Gosselin S R.Nondestructive Evaluation of Highwayes,Utilities,and Pipelines IV.Newport Beach,CA:Proccdings of SPIE 3995,2000:237-244.
[3] Zhang Q W,Fan L C,Yuan W C.Traffic-induced variability in dynamic properties of cable-stayed bridge[J].Earthquake Engineering&Structural Dynamics,2002,31(11):2015-2021.
[4] 李顺龙,李惠,欧进萍,等.考虑温度和风速影响的桥梁结构模态参数分析[J].土木工程学报,2009,42(4):100-106.
Li Shunlong,Li Hui,Ou Jinping,et al.Identification of modal parameters of bridges considering temperature and wind effects[J].China Civil Engineering Journal,2009,42(4):100-106.
[5] Wenzel H.The influence of environmental factors[C]//Boller C,Chang F,Fujino Y.Encyclopedia of Structural Health Monitoring.West Sussex,United Kingdom:John Wiley&Sons Co.Ltd.,2009:2057-2065. [6] Ralbovsky M,Deix S,Flesch R.Frequency changes in frequencybased damage identification[J].Structure and Infrastructure Engineering,2010,6(5):611-619.
[7] 邓扬,丁幼亮,李爱群.环境条件影响下悬索桥模态频率变异性的定量评价[J].振动与冲击,2011,30(8):230-236.
Deng Yang,Ding Youliang,Li Aiqun.Quantitative evaluation of variability in modal frequencies of a suspension bridge under environmental conditions[J].Journal of Vibration and Shock,2011,30(8):230-236.
[8] Cross E J,Koo K Y,Brownjohn J M W,et al.Long-term monitoring and data analysis of the Tamar Bridge[J].Mechanical Systems and Signal Processing,2013,35(1/2):16-34.
[9] 闵志华,孙利民,淡丹辉.影响斜拉桥模态参数变化的环境因素分析[J].振动与冲击,2009,28(10):99-105.
Min Zhihua,Sun Limin,Dan Danhui.Effect analysis of environmental factors on structural modal parameters of a cable-stayed bridge[J].Journal of Vibration and Shock,2009,28(10):99-105.
[10] Sun L M,Sun Z,Dan D H,et al.Large-span bridge and their health monitoring systems in China[C]//Fan Lichu,Sun Limin,Sun Zhi.Proceedings of 2007 International Symposium on Integrated Life-Cycle Design and Management of Infrastructure.Shanghai,China:Tongji University Press,2007:79-95.

大跨度斜拉桥模态频率的环境影晌因素研究

Environmental Effects on Modal Frequency of Long-Span Cable-Stayed Bridges

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 5

编辑推荐

Metrics

[1]	梁宗保1，柴洁1，纳守勇2，马天立1，唐玉1. 基于深度学习的桥梁健康监测数据有效性分析[J]. 重庆交通大学学报（自然科学版）, 2021, 40(03): 78-83.
[2]	李嘉1,2，赵昭1，王万鹏1，陈卫1. 模拟自然条件下UHPC-TPO复合构件耐老化性能研究[J]. 重庆交通大学学报（自然科学版）, 2018, 37(07): 46-53.
[3]	张奔牛，范中华，黄锐，张旭，杨光，李星星，吴韬. 基于机敏网的混凝土结构裂缝宽度监测方法研究[J]. 重庆交通大学学报（自然科学版）, 2014, 33(2): 26-29.
[4]	孙利民，周毅，谢大圻. 大跨度斜拉桥模态频率的环境影晌因素研究[J]. 重庆交通大学学报（自然科学版）, 2013, 32(6): 1106-1110.
[5]	刘浪. 影响高等级公路造价的因素研究[J]. 重庆交通大学学报（自然科学版）, 2006, 25(1): 90-92.