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Condition assessment of elastic bearing supports using vibration data

The performance of structures such as bridges, machine foundations and base isolated buildings are very much affected by the condition of their elastic bearing supports, which eventually deteriorate due to wear and tear or which can be damaged during the service life of the structure. In this study,...

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Main Authors: Fayyadh, M.M., Razak, Hashim Abdul
Format: Article
Language:English
Published: Elsevier 2012
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.um.edu.my/9039/1/Condition_assessment_of_elastic_bearing_supports_using_vibration_data.pdf
http://eprints.um.edu.my/9039/
https://doi.org/10.1016/j.conbuildmat.2011.12.043
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spelling my.um.eprints.90392019-08-07T09:10:13Z http://eprints.um.edu.my/9039/ Condition assessment of elastic bearing supports using vibration data Fayyadh, M.M. Razak, Hashim Abdul TA Engineering (General). Civil engineering (General) The performance of structures such as bridges, machine foundations and base isolated buildings are very much affected by the condition of their elastic bearing supports, which eventually deteriorate due to wear and tear or which can be damaged during the service life of the structure. In this study, the dynamic parameters, namely natural frequencies and mode shapes are used to detect the deterioration of the elastic bearing supports of a simply supported bridge girder. For this purpose, force vibration testing was conducted on a reinforced concrete bridge girder supported at the ends by rubber bearings to simulate the actual conditions in a bridge deck. Three different levels of deteriorations were investigated namely that of no deterioration, partial deterioration, and full deterioration, whereby rubber with different stiffness was used to simulate the different deterioration levels. Vibration data were obtained for two cases i.e. an undamaged girder and a damaged girder after being subjected to a load exceeding its service limit for flexure. A direct relationship was observed between the dynamic parameters and the elastic bearing stiffness. Based on the results obtained in this study, the natural frequency of mode 3 is a good indicator of the deterioration in elastic bearing support conditions while mode 1 is the most sensitive to changes in support conditions. The Modal Assurance Criteria (MAC) index can be a useful indicator to identify different causes of deterioration in the structural system. In order to confirm and verify the observations, further tests were conducted on a different beam with more deterioration levels in the elastic bearing stiffness. The results support the deductions made regarding MAC and bending frequencies. Elsevier 2012 Article PeerReviewed application/pdf en http://eprints.um.edu.my/9039/1/Condition_assessment_of_elastic_bearing_supports_using_vibration_data.pdf Fayyadh, M.M. and Razak, Hashim Abdul (2012) Condition assessment of elastic bearing supports using vibration data. Construction and Building Materials, 30. pp. 616-628. ISSN 0950-0618 https://doi.org/10.1016/j.conbuildmat.2011.12.043 doi:10.1016/j.conbuildmat.2011.12.043
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Fayyadh, M.M.
Razak, Hashim Abdul
Condition assessment of elastic bearing supports using vibration data
description The performance of structures such as bridges, machine foundations and base isolated buildings are very much affected by the condition of their elastic bearing supports, which eventually deteriorate due to wear and tear or which can be damaged during the service life of the structure. In this study, the dynamic parameters, namely natural frequencies and mode shapes are used to detect the deterioration of the elastic bearing supports of a simply supported bridge girder. For this purpose, force vibration testing was conducted on a reinforced concrete bridge girder supported at the ends by rubber bearings to simulate the actual conditions in a bridge deck. Three different levels of deteriorations were investigated namely that of no deterioration, partial deterioration, and full deterioration, whereby rubber with different stiffness was used to simulate the different deterioration levels. Vibration data were obtained for two cases i.e. an undamaged girder and a damaged girder after being subjected to a load exceeding its service limit for flexure. A direct relationship was observed between the dynamic parameters and the elastic bearing stiffness. Based on the results obtained in this study, the natural frequency of mode 3 is a good indicator of the deterioration in elastic bearing support conditions while mode 1 is the most sensitive to changes in support conditions. The Modal Assurance Criteria (MAC) index can be a useful indicator to identify different causes of deterioration in the structural system. In order to confirm and verify the observations, further tests were conducted on a different beam with more deterioration levels in the elastic bearing stiffness. The results support the deductions made regarding MAC and bending frequencies.
format Article
author Fayyadh, M.M.
Razak, Hashim Abdul
author_facet Fayyadh, M.M.
Razak, Hashim Abdul
author_sort Fayyadh, M.M.
title Condition assessment of elastic bearing supports using vibration data
title_short Condition assessment of elastic bearing supports using vibration data
title_full Condition assessment of elastic bearing supports using vibration data
title_fullStr Condition assessment of elastic bearing supports using vibration data
title_full_unstemmed Condition assessment of elastic bearing supports using vibration data
title_sort condition assessment of elastic bearing supports using vibration data
publisher Elsevier
publishDate 2012
url http://eprints.um.edu.my/9039/1/Condition_assessment_of_elastic_bearing_supports_using_vibration_data.pdf
http://eprints.um.edu.my/9039/
https://doi.org/10.1016/j.conbuildmat.2011.12.043
_version_ 1643688452389076992
score 13.211869

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