Characterization of Nonstationary Mode Interaction of Bridge by Considering Deterioration of Bearing
As all bridges get deteriorated over time, structural health monitoring of these structures has become very important for the damage identification and maintenance work. Evaluating a bridge’s health condition requires the testing of a variety of physical quantities including bridge dynamic responses...
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2018-01-01
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Series: | Advances in Materials Science and Engineering |
Online Access: | http://dx.doi.org/10.1155/2018/5454387 |
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doaj-a8b91a1f64594c3ca0e3e1287d58538e2020-11-24T22:20:44ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/54543875454387Characterization of Nonstationary Mode Interaction of Bridge by Considering Deterioration of BearingGang S. Chen0Feng Xiao1Wael Zatar2J. Leroy Hulsey3College of Information Technology and Engineering, Marshall University, Huntington, WV, USADepartment of Civil Engineering, Nanjing University of Science and Technology, Nanjing, ChinaCollege of Information Technology and Engineering, Marshall University, Huntington, WV, USADepartment of Civil and Environmental Engineering, University of Alaska Fairbanks, Fairbanks, AK, USAAs all bridges get deteriorated over time, structural health monitoring of these structures has become very important for the damage identification and maintenance work. Evaluating a bridge’s health condition requires the testing of a variety of physical quantities including bridge dynamic responses and the evaluation of the functions of varied bridge subsystems. In this study, both the acceleration of the deck and the dynamic rotational angle of the bearings in a long-span steel girder bridge were measured when the bridge system was excited by passing-by vehicles. The nonstationary dynamical phenomena including vibration mode interactions and coupling are observed in response spectrogram. To elaborate the phenomena, the linear vibration mode properties of the bridge are characterized by finite element analysis and are correlated with the specific modes in test. A theoretical model is presented showing the mechanism of the mode coupling and instability originated from the friction effects in bearing. This study offers some insights into the correlation between complex bridge vibrations and the bearing effects, which lays a foundation for the in situ health monitoring of bridge bearing by using dynamical testing.http://dx.doi.org/10.1155/2018/5454387 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gang S. Chen Feng Xiao Wael Zatar J. Leroy Hulsey |
spellingShingle |
Gang S. Chen Feng Xiao Wael Zatar J. Leroy Hulsey Characterization of Nonstationary Mode Interaction of Bridge by Considering Deterioration of Bearing Advances in Materials Science and Engineering |
author_facet |
Gang S. Chen Feng Xiao Wael Zatar J. Leroy Hulsey |
author_sort |
Gang S. Chen |
title |
Characterization of Nonstationary Mode Interaction of Bridge by Considering Deterioration of Bearing |
title_short |
Characterization of Nonstationary Mode Interaction of Bridge by Considering Deterioration of Bearing |
title_full |
Characterization of Nonstationary Mode Interaction of Bridge by Considering Deterioration of Bearing |
title_fullStr |
Characterization of Nonstationary Mode Interaction of Bridge by Considering Deterioration of Bearing |
title_full_unstemmed |
Characterization of Nonstationary Mode Interaction of Bridge by Considering Deterioration of Bearing |
title_sort |
characterization of nonstationary mode interaction of bridge by considering deterioration of bearing |
publisher |
Hindawi Limited |
series |
Advances in Materials Science and Engineering |
issn |
1687-8434 1687-8442 |
publishDate |
2018-01-01 |
description |
As all bridges get deteriorated over time, structural health monitoring of these structures has become very important for the damage identification and maintenance work. Evaluating a bridge’s health condition requires the testing of a variety of physical quantities including bridge dynamic responses and the evaluation of the functions of varied bridge subsystems. In this study, both the acceleration of the deck and the dynamic rotational angle of the bearings in a long-span steel girder bridge were measured when the bridge system was excited by passing-by vehicles. The nonstationary dynamical phenomena including vibration mode interactions and coupling are observed in response spectrogram. To elaborate the phenomena, the linear vibration mode properties of the bridge are characterized by finite element analysis and are correlated with the specific modes in test. A theoretical model is presented showing the mechanism of the mode coupling and instability originated from the friction effects in bearing. This study offers some insights into the correlation between complex bridge vibrations and the bearing effects, which lays a foundation for the in situ health monitoring of bridge bearing by using dynamical testing. |
url |
http://dx.doi.org/10.1155/2018/5454387 |
work_keys_str_mv |
AT gangschen characterizationofnonstationarymodeinteractionofbridgebyconsideringdeteriorationofbearing AT fengxiao characterizationofnonstationarymodeinteractionofbridgebyconsideringdeteriorationofbearing AT waelzatar characterizationofnonstationarymodeinteractionofbridgebyconsideringdeteriorationofbearing AT jleroyhulsey characterizationofnonstationarymodeinteractionofbridgebyconsideringdeteriorationofbearing |
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