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Enhancing the Performance of Knee Beam– Column Joint Using Hybrid Fibers Reinforced Concrete

The knee beam–column joint is a critical location in a Reinforced Concrete (RC) structure particularly when subjected to earthquake vibrations. The current structural design codes dictate the use of high amounts of steel reinforcements in the frame joint to manage large strain demands in seismic-pro...

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Main Authors: Sheikh Mohd Iqbal S Zainal Abidin, Farzad Hejazi, Raizal S. M. Rashid
Format: Article
Language:English
English
Published: Springer Science + Business Media 2021
Subjects:
TA401-492 Materials of engineering and construction. Mechanics of materials
Online Access:https://eprints.ums.edu.my/id/eprint/34613/1/Abstract.pdf
https://eprints.ums.edu.my/id/eprint/34613/2/Full%20text.pdf
https://eprints.ums.edu.my/id/eprint/34613/
https://ijcsm.springeropen.com/articles/10.1186/s40069-021-00457-w
https://doi.org/10.1186/s40069-021-00457-w
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spelling my.ums.eprints.346132022-10-28T07:23:56Z https://eprints.ums.edu.my/id/eprint/34613/ Enhancing the Performance of Knee Beam– Column Joint Using Hybrid Fibers Reinforced Concrete Sheikh Mohd Iqbal S Zainal Abidin Farzad Hejazi Raizal S. M. Rashid TA401-492 Materials of engineering and construction. Mechanics of materials The knee beam–column joint is a critical location in a Reinforced Concrete (RC) structure particularly when subjected to earthquake vibrations. The current structural design codes dictate the use of high amounts of steel reinforcements in the frame joint to manage large strain demands in seismic-prone regions. However, these codes could result in the congestion of steel reinforcements in the limited joint area which can consequently produce numerous construction complications. This study aims to improve the structural performance of Knee Joint (KJ) by reducing the load induced to the embedded steel reinforcements during seismic vibrations. Hence, this study attempted to develop a Hybrid Fiber Reinforced Concrete (HyFRC) by combining multiple synthetic fibers to be introduced onto KJ. Six KJ specimens were cast using five developed HyFRC materials and one Control specimen to be experimentally tested under lateral cyclic loading. The results indicated significant improvements for the HyFRC KJ specimens particularly in energy dissipation capacity, stiffness degradation rate, displacement ductility toughness, steel reinforcement strain and hysteretic behavior. A total of six Finite Element (FE) KJ models were developed using the HyFRC materials to verify the results from the experimental testing. The accuracy of the proposed FE models resulted in average percentage differences of 25.89% for peak load, 3.45% for peak load displacement and 0.18% for maximum displacements from the experimental data. In conclusion, this study developed HyFRC materials that are beneficial in providing cost-efficient alternatives to Reinforced Concrete (RC) KJ structures in areas with low to moderate level of seismic risks. Springer Science + Business Media 2021 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/34613/1/Abstract.pdf text en https://eprints.ums.edu.my/id/eprint/34613/2/Full%20text.pdf Sheikh Mohd Iqbal S Zainal Abidin and Farzad Hejazi and Raizal S. M. Rashid (2021) Enhancing the Performance of Knee Beam– Column Joint Using Hybrid Fibers Reinforced Concrete. International Journal of Concrete Structures and Materials, 15 (20). pp. 1-28. ISSN 1976-0485 (P-ISSN) , 2234-1315 (E-ISSN) https://ijcsm.springeropen.com/articles/10.1186/s40069-021-00457-w https://doi.org/10.1186/s40069-021-00457-w
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
English
topic TA401-492 Materials of engineering and construction. Mechanics of materials
spellingShingle TA401-492 Materials of engineering and construction. Mechanics of materials
Sheikh Mohd Iqbal S Zainal Abidin
Farzad Hejazi
Raizal S. M. Rashid
Enhancing the Performance of Knee Beam– Column Joint Using Hybrid Fibers Reinforced Concrete
description The knee beam–column joint is a critical location in a Reinforced Concrete (RC) structure particularly when subjected to earthquake vibrations. The current structural design codes dictate the use of high amounts of steel reinforcements in the frame joint to manage large strain demands in seismic-prone regions. However, these codes could result in the congestion of steel reinforcements in the limited joint area which can consequently produce numerous construction complications. This study aims to improve the structural performance of Knee Joint (KJ) by reducing the load induced to the embedded steel reinforcements during seismic vibrations. Hence, this study attempted to develop a Hybrid Fiber Reinforced Concrete (HyFRC) by combining multiple synthetic fibers to be introduced onto KJ. Six KJ specimens were cast using five developed HyFRC materials and one Control specimen to be experimentally tested under lateral cyclic loading. The results indicated significant improvements for the HyFRC KJ specimens particularly in energy dissipation capacity, stiffness degradation rate, displacement ductility toughness, steel reinforcement strain and hysteretic behavior. A total of six Finite Element (FE) KJ models were developed using the HyFRC materials to verify the results from the experimental testing. The accuracy of the proposed FE models resulted in average percentage differences of 25.89% for peak load, 3.45% for peak load displacement and 0.18% for maximum displacements from the experimental data. In conclusion, this study developed HyFRC materials that are beneficial in providing cost-efficient alternatives to Reinforced Concrete (RC) KJ structures in areas with low to moderate level of seismic risks.
format Article
author Sheikh Mohd Iqbal S Zainal Abidin
Farzad Hejazi
Raizal S. M. Rashid
author_facet Sheikh Mohd Iqbal S Zainal Abidin
Farzad Hejazi
Raizal S. M. Rashid
author_sort Sheikh Mohd Iqbal S Zainal Abidin
title Enhancing the Performance of Knee Beam– Column Joint Using Hybrid Fibers Reinforced Concrete
title_short Enhancing the Performance of Knee Beam– Column Joint Using Hybrid Fibers Reinforced Concrete
title_full Enhancing the Performance of Knee Beam– Column Joint Using Hybrid Fibers Reinforced Concrete
title_fullStr Enhancing the Performance of Knee Beam– Column Joint Using Hybrid Fibers Reinforced Concrete
title_full_unstemmed Enhancing the Performance of Knee Beam– Column Joint Using Hybrid Fibers Reinforced Concrete
title_sort enhancing the performance of knee beam– column joint using hybrid fibers reinforced concrete
publisher Springer Science + Business Media
publishDate 2021
url https://eprints.ums.edu.my/id/eprint/34613/1/Abstract.pdf
https://eprints.ums.edu.my/id/eprint/34613/2/Full%20text.pdf
https://eprints.ums.edu.my/id/eprint/34613/
https://ijcsm.springeropen.com/articles/10.1186/s40069-021-00457-w
https://doi.org/10.1186/s40069-021-00457-w
_version_ 1760231319067951104
score 13.211869

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