Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes

The natural landscape in China exposes many existing RC buildings to aggressive environments. Such exposure can lead to deterioration in structural performance with regard to resisting events such as earthquakes. Corrosion of embedded reinforcement is one of the most common mechanisms by which such...

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Main Authors: Yu, Xiaohui, Dai, Kuangyu, Li, Yushi, Li, Bing
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/160217
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1602172022-07-15T07:57:05Z Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes Yu, Xiaohui Dai, Kuangyu Li, Yushi Li, Bing School of Civil and Environmental Engineering Engineering::Civil engineering Seismic Resilience Seismic Fragility The natural landscape in China exposes many existing RC buildings to aggressive environments. Such exposure can lead to deterioration in structural performance with regard to resisting events such as earthquakes. Corrosion of embedded reinforcement is one of the most common mechanisms by which such structural degradation occurs. There has been increasing attention in recent years toward seismic resilience in communities and their constituent construction; however, to date, studies have neglected the effect of natural aging. This study aims to examine the effect of reinforcement corrosion on the seismic resilience of RC frames that are designed according to Chinese seismic design codes. A total of twenty RC frames are used to represent design and construction that is typical of coastal China, with consideration given to various seismic fortification levels and elevation arrangements. Seismic fragility relationships are developed for case frames under varying levels of reinforcement corrosion, i.e., corrosion rates are increased from 5% to 15%. Subsequently, the seismic resilience levels of uncorroded and corroded RC frames are compared using a normalized loss factor. It was found that the loss of resilience of the corroded frames is greater than that of their uncorroded counterparts. At the Rare Earthquake hazard level, the corrosion-induced increase in loss of resilience can be more than 200%, showing the significant effect of reinforcement corrosion on structural resilience under the influence of earthquakes. Supported by: National Natural Science Foundation of China under Grant No. 51778198, and the Natural Science Foundation for Excellent Young Scientists of Heilongjiang Province under Grant No.YQ2020E023. 2022-07-15T07:57:05Z 2022-07-15T07:57:05Z 2021 Journal Article Yu, X., Dai, K., Li, Y. & Li, B. (2021). Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes. Earthquake Engineering and Engineering Vibration, 20(2), 303-316. https://dx.doi.org/10.1007/s11803-021-2021-z 1671-3664 https://hdl.handle.net/10356/160217 10.1007/s11803-021-2021-z 2-s2.0-85104357489 2 20 303 316 en Earthquake Engineering and Engineering Vibration © 2021 Institute of Engineering Mechanics, China Earthquake Administration and Springer. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
Seismic Resilience
Seismic Fragility
spellingShingle Engineering::Civil engineering
Seismic Resilience
Seismic Fragility
Yu, Xiaohui
Dai, Kuangyu
Li, Yushi
Li, Bing
Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes
description The natural landscape in China exposes many existing RC buildings to aggressive environments. Such exposure can lead to deterioration in structural performance with regard to resisting events such as earthquakes. Corrosion of embedded reinforcement is one of the most common mechanisms by which such structural degradation occurs. There has been increasing attention in recent years toward seismic resilience in communities and their constituent construction; however, to date, studies have neglected the effect of natural aging. This study aims to examine the effect of reinforcement corrosion on the seismic resilience of RC frames that are designed according to Chinese seismic design codes. A total of twenty RC frames are used to represent design and construction that is typical of coastal China, with consideration given to various seismic fortification levels and elevation arrangements. Seismic fragility relationships are developed for case frames under varying levels of reinforcement corrosion, i.e., corrosion rates are increased from 5% to 15%. Subsequently, the seismic resilience levels of uncorroded and corroded RC frames are compared using a normalized loss factor. It was found that the loss of resilience of the corroded frames is greater than that of their uncorroded counterparts. At the Rare Earthquake hazard level, the corrosion-induced increase in loss of resilience can be more than 200%, showing the significant effect of reinforcement corrosion on structural resilience under the influence of earthquakes.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Yu, Xiaohui
Dai, Kuangyu
Li, Yushi
Li, Bing
format Article
author Yu, Xiaohui
Dai, Kuangyu
Li, Yushi
Li, Bing
author_sort Yu, Xiaohui
title Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes
title_short Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes
title_full Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes
title_fullStr Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes
title_full_unstemmed Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes
title_sort seismic resilience assessment of corroded reinforced concrete structures designed to the chinese codes
publishDate 2022
url https://hdl.handle.net/10356/160217
_version_ 1738844934916538368