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Nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading

Infrastructures are frequently vulnerable to sustained cyclic loads and structural vibration. The accumulated cyclic stresses will induce fatigue in the structures and contribute to their inadequate service lifespan. Consequently, analyzing the present structural health status by the structural stif...

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Main Authors: Zou, Chuanlong, Ibrahim, Zainah, Hashim, Huzaifa, Jamadin, Adiza, Ayough, Pouria
Format: Article
Published: Elsevier 2022
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.um.edu.my/40801/
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spelling my.um.eprints.408012023-09-27T07:27:54Z http://eprints.um.edu.my/40801/ Nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading Zou, Chuanlong Ibrahim, Zainah Hashim, Huzaifa Jamadin, Adiza Ayough, Pouria TA Engineering (General). Civil engineering (General) Infrastructures are frequently vulnerable to sustained cyclic loads and structural vibration. The accumulated cyclic stresses will induce fatigue in the structures and contribute to their inadequate service lifespan. Consequently, analyzing the present structural health status by the structural stiffness measurement is crucial. This study investigated the fatigue performance and dynamic progressive damage behavior of reinforced concrete (RC) slabs under high-cyclic fatigue loadings using nonlinear finite element (FE) analysis. A new model was recommended for predicting the concrete's residual strength. The accuracy of the suggested model and the FE simulation was validated by comparing the predicted natural frequencies, mode shapes, residual strength, and crack characteristics of speci-mens with the experimental results. Finally, a novel model for determining the dynamic stiffness of RC slabs was developed. Results showed that the cumulative degradation of the natural frequency, stiffness, and damage development of steel rebars and concrete increased as the fatigue loading cycle increased, indicating that the dynamic response and fatigue damage for RC slabs in the later stages of high-cyclic fatigue loading were more severe. Additionally, the RC slab's natural frequency was reduced rapidly during the initial steps of fatigue and, after that, slowed noticeably. Validation of the dynamic stiffness model demonstrated its capability in predicting the stiffness of fatigued and damaged RC slabs. The results provide practical insights for analyzing the dynamic behavior of existing structures by considering the nonlinear progressive damage and may improve the effi-ciency of structural damage detection.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Elsevier 2022-11 Article PeerReviewed Zou, Chuanlong and Ibrahim, Zainah and Hashim, Huzaifa and Jamadin, Adiza and Ayough, Pouria (2022) Nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading. Journal of Materials Research and Technology-JMR&T, 21. pp. 992-1012. ISSN 2238-7854, DOI https://doi.org/10.1016/j.jmrt.2022.09.091 <https://doi.org/10.1016/j.jmrt.2022.09.091>. 10.1016/j.jmrt.2022.09.091
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/
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Zou, Chuanlong
Ibrahim, Zainah
Hashim, Huzaifa
Jamadin, Adiza
Ayough, Pouria
Nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading
description Infrastructures are frequently vulnerable to sustained cyclic loads and structural vibration. The accumulated cyclic stresses will induce fatigue in the structures and contribute to their inadequate service lifespan. Consequently, analyzing the present structural health status by the structural stiffness measurement is crucial. This study investigated the fatigue performance and dynamic progressive damage behavior of reinforced concrete (RC) slabs under high-cyclic fatigue loadings using nonlinear finite element (FE) analysis. A new model was recommended for predicting the concrete's residual strength. The accuracy of the suggested model and the FE simulation was validated by comparing the predicted natural frequencies, mode shapes, residual strength, and crack characteristics of speci-mens with the experimental results. Finally, a novel model for determining the dynamic stiffness of RC slabs was developed. Results showed that the cumulative degradation of the natural frequency, stiffness, and damage development of steel rebars and concrete increased as the fatigue loading cycle increased, indicating that the dynamic response and fatigue damage for RC slabs in the later stages of high-cyclic fatigue loading were more severe. Additionally, the RC slab's natural frequency was reduced rapidly during the initial steps of fatigue and, after that, slowed noticeably. Validation of the dynamic stiffness model demonstrated its capability in predicting the stiffness of fatigued and damaged RC slabs. The results provide practical insights for analyzing the dynamic behavior of existing structures by considering the nonlinear progressive damage and may improve the effi-ciency of structural damage detection.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
format Article
author Zou, Chuanlong
Ibrahim, Zainah
Hashim, Huzaifa
Jamadin, Adiza
Ayough, Pouria
author_facet Zou, Chuanlong
Ibrahim, Zainah
Hashim, Huzaifa
Jamadin, Adiza
Ayough, Pouria
author_sort Zou, Chuanlong
title Nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading
title_short Nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading
title_full Nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading
title_fullStr Nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading
title_full_unstemmed Nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading
title_sort nonlinear analysis of reinforced concrete slabs under high-cyclic fatigue loading
publisher Elsevier
publishDate 2022
url http://eprints.um.edu.my/40801/
_version_ 1781704527708160000
score 13.211869

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