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Comparative study on seismic behavior of corroded RC columns strengthened by ECC combined with steel cage /fiber grid/CFRP

A method for strengthening was proposed to improve the seismic behavior of corroded reinforced concrete (RC) columns by using engineered cementitious composite (ECC) combined with a steel cage/fiber grid/carbon fibre reinforced plastics(CFRP). The corroded RC columns strengthened with ECC combined w...

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Main Authors: Che, Jialing, Liu, Chen, Wu, Ping, Li, Xinping, Liu, Haifeng, Doh, Shu Ing
Format: Article
Language:English
English
Published: Elsevier Ltd 2024
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://umpir.ump.edu.my/id/eprint/42320/1/2024%20Comparative%20study%20on%20seismic%20behavior%20of%20corroded%20RC%20columns.pdf
http://umpir.ump.edu.my/id/eprint/42320/7/Comparative%20study%20on%20seismic%20behavior%20of%20corroded%20RC%20columns.pdf
http://umpir.ump.edu.my/id/eprint/42320/
https://doi.org/10.1016/j.istruc.2024.106866
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spelling my.ump.umpir.423202024-08-13T00:05:17Z http://umpir.ump.edu.my/id/eprint/42320/ Comparative study on seismic behavior of corroded RC columns strengthened by ECC combined with steel cage /fiber grid/CFRP Che, Jialing Liu, Chen Wu, Ping Li, Xinping Liu, Haifeng Doh, Shu Ing TA Engineering (General). Civil engineering (General) A method for strengthening was proposed to improve the seismic behavior of corroded reinforced concrete (RC) columns by using engineered cementitious composite (ECC) combined with a steel cage/fiber grid/carbon fibre reinforced plastics(CFRP). The corroded RC columns strengthened with ECC combined with a steel cage, fiber grid, and CFRP were subjected to low cyclic compression tests at design axial pressure ratios (n) of 0.3 and compared with corroded and uncorroded columns. Experimental results showed that ECC strengthening of corroded RC columns not only significantly improved their load-carrying capacity, displacement ductility, and energy dissipation capacity but also effectively reduced the degree of damage and stiffness degradation. The ductility coefficients of ECC/steel cage composite strengthened columns and ECC/CFRP composite strengthened columns are 35.58 % and 34.13 % higher, respectively, compared to ECC fully strengthened columns, while the ductility coefficient of ECC/fiber grid composite strengthened columns decreased by 4.33 % compared to ECC fully strengthened columns. Among them, the ECC/steel cage composite-strengthened columns exhibited the highest number of hysteresis loops, the strongest energy dissipation capacity, and the best strengthening effect. Additionally, a restoring force model for ECC-strengthened corroded RC columns was established, and its validity was verified through theoretical calculations. Elsevier Ltd 2024 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/42320/1/2024%20Comparative%20study%20on%20seismic%20behavior%20of%20corroded%20RC%20columns.pdf pdf en http://umpir.ump.edu.my/id/eprint/42320/7/Comparative%20study%20on%20seismic%20behavior%20of%20corroded%20RC%20columns.pdf Che, Jialing and Liu, Chen and Wu, Ping and Li, Xinping and Liu, Haifeng and Doh, Shu Ing (2024) Comparative study on seismic behavior of corroded RC columns strengthened by ECC combined with steel cage /fiber grid/CFRP. Structures, 66 (106866). pp. 1-15. ISSN 2352-0124. (Published) https://doi.org/10.1016/j.istruc.2024.106866 10.1016/j.istruc.2024.106866
institution Universiti Malaysia Pahang Al-Sultan Abdullah
building UMPSA Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang Al-Sultan Abdullah
content_source UMPSA Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Che, Jialing
Liu, Chen
Wu, Ping
Li, Xinping
Liu, Haifeng
Doh, Shu Ing
Comparative study on seismic behavior of corroded RC columns strengthened by ECC combined with steel cage /fiber grid/CFRP
description A method for strengthening was proposed to improve the seismic behavior of corroded reinforced concrete (RC) columns by using engineered cementitious composite (ECC) combined with a steel cage/fiber grid/carbon fibre reinforced plastics(CFRP). The corroded RC columns strengthened with ECC combined with a steel cage, fiber grid, and CFRP were subjected to low cyclic compression tests at design axial pressure ratios (n) of 0.3 and compared with corroded and uncorroded columns. Experimental results showed that ECC strengthening of corroded RC columns not only significantly improved their load-carrying capacity, displacement ductility, and energy dissipation capacity but also effectively reduced the degree of damage and stiffness degradation. The ductility coefficients of ECC/steel cage composite strengthened columns and ECC/CFRP composite strengthened columns are 35.58 % and 34.13 % higher, respectively, compared to ECC fully strengthened columns, while the ductility coefficient of ECC/fiber grid composite strengthened columns decreased by 4.33 % compared to ECC fully strengthened columns. Among them, the ECC/steel cage composite-strengthened columns exhibited the highest number of hysteresis loops, the strongest energy dissipation capacity, and the best strengthening effect. Additionally, a restoring force model for ECC-strengthened corroded RC columns was established, and its validity was verified through theoretical calculations.
format Article
author Che, Jialing
Liu, Chen
Wu, Ping
Li, Xinping
Liu, Haifeng
Doh, Shu Ing
author_facet Che, Jialing
Liu, Chen
Wu, Ping
Li, Xinping
Liu, Haifeng
Doh, Shu Ing
author_sort Che, Jialing
title Comparative study on seismic behavior of corroded RC columns strengthened by ECC combined with steel cage /fiber grid/CFRP
title_short Comparative study on seismic behavior of corroded RC columns strengthened by ECC combined with steel cage /fiber grid/CFRP
title_full Comparative study on seismic behavior of corroded RC columns strengthened by ECC combined with steel cage /fiber grid/CFRP
title_fullStr Comparative study on seismic behavior of corroded RC columns strengthened by ECC combined with steel cage /fiber grid/CFRP
title_full_unstemmed Comparative study on seismic behavior of corroded RC columns strengthened by ECC combined with steel cage /fiber grid/CFRP
title_sort comparative study on seismic behavior of corroded rc columns strengthened by ecc combined with steel cage /fiber grid/cfrp
publisher Elsevier Ltd
publishDate 2024
url http://umpir.ump.edu.my/id/eprint/42320/1/2024%20Comparative%20study%20on%20seismic%20behavior%20of%20corroded%20RC%20columns.pdf
http://umpir.ump.edu.my/id/eprint/42320/7/Comparative%20study%20on%20seismic%20behavior%20of%20corroded%20RC%20columns.pdf
http://umpir.ump.edu.my/id/eprint/42320/
https://doi.org/10.1016/j.istruc.2024.106866
_version_ 1822924607996297216
score 13.235362

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