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Ageing effects on high damping bridge rubber bearing

In recent years high damping rubber (hdr) material has attracted much attention of technologists because it possesses both flexibility and high damping properties. However, it is also known that rubber performance drops due to the ageing effect. Many problems are still not clear, for example, how do...

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Main Authors: Gu, Haosheng, Itoh, Yoshito
Format: Conference or Workshop Item
Language:English
Published: 2006
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/id/eprint/133/1/Haoshenggu2006_Ageingeffectsonhighdamping.pdf
http://eprints.utm.my/id/eprint/133/
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spelling my.utm.1332017-08-22T23:55:31Z http://eprints.utm.my/id/eprint/133/ Ageing effects on high damping bridge rubber bearing Gu, Haosheng Itoh, Yoshito TA Engineering (General). Civil engineering (General) In recent years high damping rubber (hdr) material has attracted much attention of technologists because it possesses both flexibility and high damping properties. However, it is also known that rubber performance drops due to the ageing effect. Many problems are still not clear, for example, how does the property of hdr material change over the time, which environmental factor dominates the degradation of hdr, in what way does ageing progress from the surface to the interior of the hdr bearing, and what influence does ageing produce on the mechanical performance of hdr bridge bearing. In order to solve these problems, in this study a series of accelerated exposure tests are carried out on hdr pieces and blocks. Firstly, different degradation factors such as thermal oxidation, ultraviolet, ozone, low temperature ozone, salt water and acid rain are applied to hdr specimens. The property variations are examined and the thermal oxidation is found to be the predominant degradation factor. Then, thermal oxidation tests are performed on hdr blocks at various elevated temperatures and the development of the property profiles is investigated. An aging model for hdr bearing is developed to predict the mechanical behaviors at any position inside the bearing. Next, based on the predicted material properties, fem analysis is carried out using the constitutive law. Finally, the long-term performance of aged hdr bearing is clarified. Using the arrhenius methodology, the test conditions may be transformed to the real environment, so that the future performance a hdr bridge bearing may be estimated with the site condition taken into consideration. 2006-09 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/133/1/Haoshenggu2006_Ageingeffectsonhighdamping.pdf Gu, Haosheng and Itoh, Yoshito (2006) Ageing effects on high damping bridge rubber bearing. In: 6th Asia-Pacific Structural Engineering and Construction Conference, 5-6 September 2006, Kuala Lumpur, Malaysia.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Gu, Haosheng
Itoh, Yoshito
Ageing effects on high damping bridge rubber bearing
description In recent years high damping rubber (hdr) material has attracted much attention of technologists because it possesses both flexibility and high damping properties. However, it is also known that rubber performance drops due to the ageing effect. Many problems are still not clear, for example, how does the property of hdr material change over the time, which environmental factor dominates the degradation of hdr, in what way does ageing progress from the surface to the interior of the hdr bearing, and what influence does ageing produce on the mechanical performance of hdr bridge bearing. In order to solve these problems, in this study a series of accelerated exposure tests are carried out on hdr pieces and blocks. Firstly, different degradation factors such as thermal oxidation, ultraviolet, ozone, low temperature ozone, salt water and acid rain are applied to hdr specimens. The property variations are examined and the thermal oxidation is found to be the predominant degradation factor. Then, thermal oxidation tests are performed on hdr blocks at various elevated temperatures and the development of the property profiles is investigated. An aging model for hdr bearing is developed to predict the mechanical behaviors at any position inside the bearing. Next, based on the predicted material properties, fem analysis is carried out using the constitutive law. Finally, the long-term performance of aged hdr bearing is clarified. Using the arrhenius methodology, the test conditions may be transformed to the real environment, so that the future performance a hdr bridge bearing may be estimated with the site condition taken into consideration.
format Conference or Workshop Item
author Gu, Haosheng
Itoh, Yoshito
author_facet Gu, Haosheng
Itoh, Yoshito
author_sort Gu, Haosheng
title Ageing effects on high damping bridge rubber bearing
title_short Ageing effects on high damping bridge rubber bearing
title_full Ageing effects on high damping bridge rubber bearing
title_fullStr Ageing effects on high damping bridge rubber bearing
title_full_unstemmed Ageing effects on high damping bridge rubber bearing
title_sort ageing effects on high damping bridge rubber bearing
publishDate 2006
url http://eprints.utm.my/id/eprint/133/1/Haoshenggu2006_Ageingeffectsonhighdamping.pdf
http://eprints.utm.my/id/eprint/133/
_version_ 1643643007039176704
score 13.223943

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