A peculiar value of M to Mcr ratio: Reconsidering assumptions of curvature analysis of reinforced concrete beams

The paper critically evaluates design code techniques (ACI 318-14, ACI 318-19, and Eurocode 2) for the instantaneous curvature analysis of reinforced concrete (RC) beams. The study examines the soundness of the assumption that a fully cracked section represents the lower bound of the effective momen...

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Autores principales:	Gintaris Kaklauskas, Aleksandr Sokolov
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	RC beam Curvature Effective moment of inertia Deflection Cracked section Statistics Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/5653314e0fb1429b92b6289a1f132a50
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id	oai:doaj.org-article:5653314e0fb1429b92b6289a1f132a50
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spelling	oai:doaj.org-article:5653314e0fb1429b92b6289a1f132a502021-12-01T05:06:13ZA peculiar value of M to Mcr ratio: Reconsidering assumptions of curvature analysis of reinforced concrete beams2666-496810.1016/j.apples.2021.100053https://doaj.org/article/5653314e0fb1429b92b6289a1f132a502021-09-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666496821000194https://doaj.org/toc/2666-4968The paper critically evaluates design code techniques (ACI 318-14, ACI 318-19, and Eurocode 2) for the instantaneous curvature analysis of reinforced concrete (RC) beams. The study examines the soundness of the assumption that a fully cracked section represents the lower bound of the effective moment of inertia (or bending stiffness) used along with the hypothesis of plane sections. Experimental RC beams were investigated to find a load corresponding to the stiffness of a fully cracked section. The load was identified as a condition when the resultant tension stiffening force, inversely calculated from the test moment-curvature response, equals zero. The conducted analysis showed that for the majority of the experimental beams, the stiffness of a fully cracked section was reached at a bending moment of 3Mcr (with Mcr defined by ACI 318), irrespective of the geometrical and material characteristics of the beams. As these results conflict with the abovementioned hypothesis regarding the lower bound of bending stiffness, the hypothesis was reformulated accordingly, and a new curvature model was proposed. A comparison of the predicted and experimental curvatures of 69 RC beams reported in the literature demonstrates the superiority of the proposed model over the design code techniques.Gintaris KaklauskasAleksandr SokolovElsevierarticleRC beamCurvatureEffective moment of inertiaDeflectionCracked sectionStatisticsEngineering (General). Civil engineering (General)TA1-2040ENApplications in Engineering Science, Vol 7, Iss , Pp 100053- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	RC beam Curvature Effective moment of inertia Deflection Cracked section Statistics Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	RC beam Curvature Effective moment of inertia Deflection Cracked section Statistics Engineering (General). Civil engineering (General) TA1-2040 Gintaris Kaklauskas Aleksandr Sokolov A peculiar value of M to Mcr ratio: Reconsidering assumptions of curvature analysis of reinforced concrete beams
description	The paper critically evaluates design code techniques (ACI 318-14, ACI 318-19, and Eurocode 2) for the instantaneous curvature analysis of reinforced concrete (RC) beams. The study examines the soundness of the assumption that a fully cracked section represents the lower bound of the effective moment of inertia (or bending stiffness) used along with the hypothesis of plane sections. Experimental RC beams were investigated to find a load corresponding to the stiffness of a fully cracked section. The load was identified as a condition when the resultant tension stiffening force, inversely calculated from the test moment-curvature response, equals zero. The conducted analysis showed that for the majority of the experimental beams, the stiffness of a fully cracked section was reached at a bending moment of 3Mcr (with Mcr defined by ACI 318), irrespective of the geometrical and material characteristics of the beams. As these results conflict with the abovementioned hypothesis regarding the lower bound of bending stiffness, the hypothesis was reformulated accordingly, and a new curvature model was proposed. A comparison of the predicted and experimental curvatures of 69 RC beams reported in the literature demonstrates the superiority of the proposed model over the design code techniques.
format	article
author	Gintaris Kaklauskas Aleksandr Sokolov
author_facet	Gintaris Kaklauskas Aleksandr Sokolov
author_sort	Gintaris Kaklauskas
title	A peculiar value of M to Mcr ratio: Reconsidering assumptions of curvature analysis of reinforced concrete beams
title_short	A peculiar value of M to Mcr ratio: Reconsidering assumptions of curvature analysis of reinforced concrete beams
title_full	A peculiar value of M to Mcr ratio: Reconsidering assumptions of curvature analysis of reinforced concrete beams
title_fullStr	A peculiar value of M to Mcr ratio: Reconsidering assumptions of curvature analysis of reinforced concrete beams
title_full_unstemmed	A peculiar value of M to Mcr ratio: Reconsidering assumptions of curvature analysis of reinforced concrete beams
title_sort	peculiar value of m to mcr ratio: reconsidering assumptions of curvature analysis of reinforced concrete beams
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/5653314e0fb1429b92b6289a1f132a50
work_keys_str_mv	AT gintariskaklauskas apeculiarvalueofmtomcrratioreconsideringassumptionsofcurvatureanalysisofreinforcedconcretebeams AT aleksandrsokolov apeculiarvalueofmtomcrratioreconsideringassumptionsofcurvatureanalysisofreinforcedconcretebeams AT gintariskaklauskas peculiarvalueofmtomcrratioreconsideringassumptionsofcurvatureanalysisofreinforcedconcretebeams AT aleksandrsokolov peculiarvalueofmtomcrratioreconsideringassumptionsofcurvatureanalysisofreinforcedconcretebeams
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A peculiar value of M to Mcr ratio: Reconsidering assumptions of curvature analysis of reinforced concrete beams

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