Engineering Mechanics ›› 2019, Vol. 36 ›› Issue (2): 186-194.doi: 10.6052/j.issn.1000-4750.2017.12.0954

Previous Articles     Next Articles

REAL-TIME SEPERATION OF TEMPERATURE EFFECT ON DYNAMIC STRAIN MONITORING AND MOVING LOAD IDENTIFICATION OF BRIDGE STRUCTURE

SUN Ya-qiong, ZHAO Zuo-zhou   

  1. Department of Civil Engineering, Tsinghua University, Beijing 100084, China
  • Received:2017-12-18 Revised:2018-10-08 Online:2019-02-22 Published:2019-02-22

Abstract: Strain monitoring is an important content of health monitoring and condition assessment for a bridge structure. However, in practical engineering application, the value of strain monitoring is usually affected greatly by temperature, so that it is not able to distinguish the strain monitoring value caused by a moving load from the total measured strain, which lead to the loss of efficacy of a pre-established early-warning index. Based on the monitoring results of strain and temperature of a cable-stayed bridge in Hefei, an engineering method for the real-time separating temperature effect from strain monitoring is derived. First, the temperature distribution in the girder of the bridge has been analyzed, and a suggestion for temperature sensors distribution is put forward. Then, according to the analysis of the monitoring value of strain, the temperature effect value is obtained by the time-varying average value method. The simple and efficient method can be applied to the real-time temperature correction of monitoring data and the setting of dynamic early-warning index in an online bridge structure health monitoring system. The residual strains of different locations can be used to identify the moving load of a bridge structure.

Key words: structural health monitoring, strain monitoring, temperature effect, real-time separation, moving load identification

CLC Number: 

  • U446
[1] 陈波, 郑瑾, 王建平. 桥梁结构温度效应研究进展[J]. 武汉理工大学学报, 2010, 32(24):79-83. Chen Bo, Zheng Jin, Wang Jianping. State-of-the-art of the temperature effects of bridges[J]. Journal of Wuhan University of Technology, 2010, 32(24):79-83. (in Chinese)
[2] 王高新, 丁幼亮, 李爱群, 等. 基于长期监测数据的润扬大桥斜拉桥钢箱梁横向温差特性研究[J]. 工程力学, 2013, 30(1):163-167. Wang Gaoxin, Ding Youliang, Li Aiqun, et al. Characteristics of transverse temperature differences of steel box girder in runyang cable-stayed bridge using long-term monitoring[J]. Engineering Mechanics, 2013, 30(1):163-167. (in Chinese)
[3] 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.
[4] 李惠, 鲍跃全, 李顺龙, 等. 结构健康监测数据科学与工程[J]. 工程力学, 2015, 32(8):1-7. Li Hui, Bao Yuequan, Li Shunlong, et al. Data science and engineering for structural health monitoring[J]. Engineering Mechanics, 2015, 32(8):1-7. (in Chinese)
[5] 周文松, 李惠, 欧进萍, 等. 大型桥梁健康监测系统的数据采集子系统设计方法[J]. 公路交通科技, 2006, 23(3):83-87. Zhou Wensong, Li Hui, Ou Jinping, et al. Design method of data acquisition system of health monitoring systems for long span bridges[J]. Journal of Highway and Transportation Research and Development, 2006, 23(3):83-87. (in Chinese)
[6] Bendat J S, Piersol A G. Random data:Analysis and measurement procedures[M]. New York:Wiley, 2000:396-398.
[7] 梁宗保, 陈伟民, 符玉梅, 等. 混凝土桥梁结构应变监测的温度效应分离方法研究[J]. 混凝土, 2005(12):3-5. Liang Zongbao, Chen Weimin, Fu Yumei, et al. Method for separating by temperature effect from strain monitoring of concrete bridge structure[J]. Concrete, 2005(12):3-5. (in Chinese)
[8] 陈夏春, 陈德伟. 多元线性回归在桥梁应变监测温度效应分析中的应用[J]. 结构工程师, 2011, 27(2):120-126. Chen Xiachun, Chen Dewei. Application of multiple linear regression model in analysis of temperature effect on strain monitoring for bridge structures[J]. Structural Engineers, 2011, 27(2):120-126. (in Chinese)
[9] Huang N E, Shen Z, Long S R, et al. The empirical mode decomposition and the hilbert spectrum for nonlinear and non-stationary time series analysis[J]. Proceeding of the Royal Society of London A:Mathematical, Physical and Engineering Sciences, 1998, 454:903-995.
[10] 李苗, 任伟新, 黄天立, 等. 基于EMD与IMF能量的桥梁应变温度效应成分的提取[J]. 公路交通科技, 2015, 32(7):62-68. Li Miao, Ren Weixin, Huang Tianli, et al. Extraction of bridge strain temperature effect based on EMD and IMF energy[J]. Journal of Highway and Transportation Research and Development, 2015, 32(7):62-68. (in Chinese)
[11] 刘纲, 邵毅敏, 黄宗明, 等. 长期监测中结构温度效应分离的一种新方法[J]. 工程力学, 2010, 27(3):55-61. Liu Gang, Shao Yimin, Huang Zongming, et al. A new method to separate temperature effect from long-term structural health monitoring data[J]. Engineering Mechanics, 2010, 27(3):55-61. (in Chinese)
[12] Tang L, Liu Z, Jiang B, et al. Features of long-term health monitored strains of a bridge with wavelet packet analysis[J]. Theoretical and Applied Mechanics Letters, 2011, 1(5):27-30.
[13] 涂成枫, 刘泽佳, 张舸, 等. 面向桥梁长期健康监测的大数据处理技术及应用[J]. 实验力学, 2017, 32(5):652-663. Tu Chengfeng, Liu Zejia, Zhang Ge, et al. Processing technique and application of big data oriented to long-term bridge health monitoring[J]. Journal of Experimental Mechanics, 2017, 32(5):652-663. (in Chinese)
[14] 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. 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. (in Chinese)
[15] 周毅, 孙利民, 闵志华. 斜拉桥主梁应变监测数据分析[J]. 振动与冲击, 2011, 30(4):230-235. Zhou Yi, Sun Limin, Min Zhihua. Girder strain analysis of a cable-stayed bridge[J]. Journal of Vibration and Shock, 2011, 30(4):230-235. (in Chinese)
[1] BAI Lu-shuai, LI Gang, JIN Yong-qiang, LI Hong-nan. A STRUCTURAL STATE IDENTIFICATION METHOD FOR TRUSS STRUCTURES WITH SEPARATED DAMAGE [J]. Engineering Mechanics, 2019, 36(1): 53-60.
[2] REN Peng, ZHOU Zhi, BAI Shi, OU Jin-ping. RESEARCH ON A STRAIN RESPONSE ESTIMATION METHOD FOR TRUSS STRUCTURE FATIGUE MONITORING [J]. Engineering Mechanics, 2018, 35(9): 114-125.
[3] ZHOU Yi, SUN Li-min, XIE Mo-wen. TEMPERATURE EFFECTS ON THE MID-SPAN VERTICAL DISPLACEMENT OF A CABLE-STAYED BRIDGE [J]. Engineering Mechanics, 2018, 35(8): 46-54.
[4] DU Yong-feng, ZHENG Wen-zhi, LI Wan-run, LI Hui, WANG Hao. STUDY ON THE DEPENDENCY OF STATIC AND DYNAMIC CHARACTERISTICS WITH ENVIRONMENTAL TEMPERATURE FOR LONG IRREGULAR BASE-ISOLATED STRUCTURES [J]. Engineering Mechanics, 2017, 34(7): 69-78.
[5] ZHANG Huan, ZHOU Guang-dong, WU Er-jun. STATISTICAL MODEL ESTIMATION OF EXTREME THERMAL GRADIENTS IN LONG-SPAN BRIDGES COMBINING PARAMETER UPDATING [J]. Engineering Mechanics, 2017, 34(3): 124-130.
[6] HE Wen-peng, LEI Jia-yan. THE ESTABLISHMENT OF ONLINE MONITORING SYSTEM FOR TIANYUAN BRIDGE AND PRELIMINARY ANALYSIS OF DATA [J]. Engineering Mechanics, 2016, 33(增刊): 234-238.
[7] SONG Biao, LI Hong-nan, REN Liang, FAN Shu-li. STRUCTURAL HEALTH MONITORING AND ANALYZING FOR THE WHOLE HIGH TEMPERATURE CUTTING PROCESS OF A STEEL BEAM [J]. Engineering Mechanics, 2016, 33(9): 69-75.
[8] DONG Man-sheng, LU Jing, LING Tian-qing, SUN Zhi-bin, LI Ling-lin. PARAMETRIC MODEL FOR ASPHALT MIXTURES CONSIDERING TEMPERATURE EFFECT [J]. Engineering Mechanics, 2016, 33(6): 180-185,193.
[9] LI Hui, BAO Yue-quan, LI Shun-long, ZHANG Dong-yu. DATA SCIENCE AND ENGINEERING FOR STRUCTURAL HEALTH MONITORING [J]. Engineering Mechanics, 2015, 32(8): 1-7.
[10] DU Yong-feng, ZHAO Li-jie, ZHANG Tao, ZHENG Wen-zhi, LI Wan-run. STUDY ON CONSTRUCTION MECHANICS OF LONG COMPLICATED ISOLATED STRUCTURES AND LIFE-CYCLE MONITORING [J]. Engineering Mechanics, 2015, 32(7): 1-10.
[11] SUN Xiao-dan, HOU Gang-ling, WANG Yue-min, CHEN Qiang. OPTIMAL PLACEMENT OF MULTI-TYPE SENSOR BASED ON SENSITIVITY FOR PLATE STRUCTURES [J]. Engineering Mechanics, 2015, 32(4): 77-84.
[12] YAN Shi, SONG Bi-cheng, SUN Wei, YAN Han, YU Qi-le. PUSHOVER ANALYSIS ON ROCK ANCHOR FOUNDATION FOR WIND TURBO-GENERATOR AND STRESS STATE MONITORING [J]. Engineering Mechanics, 2014, 31(增刊): 36-40.
[13] CHEN Zhi-wei. FATIGUE RELIABILITY ASSESSMENT OF MULTI-LOADING SUSPENSION BRIDGES BASED ON SHMS [J]. Engineering Mechanics, 2014, 31(7): 99-105.
[14] DENG Yang, LI Ai-qun, DING You-liang. ANALYSIS OF MONITORED MASS STRAIN DATA AND FATIGUE ASSESSEMENT FOR STEEL-BOX-GIRDER BRIDGES [J]. Engineering Mechanics, 2014, 31(7): 69-77.
[15] HE Zhi-quan, ZHOU Li, SUN Hu. REFERENCE-FREE LAMB WAVE CRACK DETECTION BASED ON TRANSFER IMPEDANCE ENERGY [J]. Engineering Mechanics, 2014, 31(7): 250-256.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!