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Flexure Behaviour of Corroded Reinforcement Concrete Beams Under Sustained Loads

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Název: Flexure Behaviour of Corroded Reinforcement Concrete Beams Under Sustained Loads
Autoři: Abed Al-Mortadha O., Daud Sultan A.
Zdroj: Civil and Environmental Engineering, Vol 20, Iss 2, Pp 1162-1173 (2024)
Informace o vydavateli: Walter de Gruyter GmbH, 2024.
Rok vydání: 2024
Témata: non-linear analysis, corrosion, shrinkage, 0211 other engineering and technologies, 02 engineering and technology, TA1-2040, long-term deflection, Engineering (General). Civil engineering (General), creep, 0201 civil engineering
Popis: The long-term behaviour of concrete beams with corroded reinforcement is a critical aspect that demands thorough comprehension to ensure the serviceability and durability of reinforced concrete structures. This paper aims to investigate the long-term performance of reinforced concrete (RC) beams with corroded reinforcement numerically. Two experimental datasets from existing literature were selected to build a nonlinear finite element model. The selected beams were tested under four-points sustained bending load and three bending point flexural test with deferent level of corrosion. A parametric study was then conducted taking into account concrete compressive strength, reinforcement yield strength, ambient temperature, relative humidity and sustained load level to get a better understanding on the factors that effecting the long-term behaviour of concrete beams with corroded reinforcement. Results demonstrated that, Diana FEA has an excellent ability to predicating the long-term behaviour of RC beams with corroded reinforcement. The analysis of the parametric study revealed that increasing relative humidity from 70% to 90% resulted in a 45% to 53% reduction in developed deflections. Whereas once the temperature rose from 20°C to 40°C the developed deflection increased from 13.9% to 17.2%. This outcome demonstrating the significant impact of environmental factors on the long-term behaviour of corroded reinforced concrete beams. Finaly, once the yiled stregth of the steel reinforcement increased from 380 Mpa to 550 Mpa, the developed deflection rate increased from 46% to 54%.
Druh dokumentu: Article
Jazyk: English
ISSN: 2199-6512
DOI: 10.2478/cee-2024-0085
Přístupová URL adresa: https://doaj.org/article/cc2f28d219aa4691a5a64f26ce10ecef
Rights: CC BY
Přístupové číslo: edsair.doi.dedup.....7e56b19fcc275ea2a4590e9ba06280a0
Databáze: OpenAIRE
Popis
Abstrakt:The long-term behaviour of concrete beams with corroded reinforcement is a critical aspect that demands thorough comprehension to ensure the serviceability and durability of reinforced concrete structures. This paper aims to investigate the long-term performance of reinforced concrete (RC) beams with corroded reinforcement numerically. Two experimental datasets from existing literature were selected to build a nonlinear finite element model. The selected beams were tested under four-points sustained bending load and three bending point flexural test with deferent level of corrosion. A parametric study was then conducted taking into account concrete compressive strength, reinforcement yield strength, ambient temperature, relative humidity and sustained load level to get a better understanding on the factors that effecting the long-term behaviour of concrete beams with corroded reinforcement. Results demonstrated that, Diana FEA has an excellent ability to predicating the long-term behaviour of RC beams with corroded reinforcement. The analysis of the parametric study revealed that increasing relative humidity from 70% to 90% resulted in a 45% to 53% reduction in developed deflections. Whereas once the temperature rose from 20°C to 40°C the developed deflection increased from 13.9% to 17.2%. This outcome demonstrating the significant impact of environmental factors on the long-term behaviour of corroded reinforced concrete beams. Finaly, once the yiled stregth of the steel reinforcement increased from 380 Mpa to 550 Mpa, the developed deflection rate increased from 46% to 54%.
ISSN:21996512
DOI:10.2478/cee-2024-0085