Nonlinear Numerical Assessment of Exterior Beam-Column Connections with Low-Strength Concrete

The ductility and capacity of reinforced concrete beam-column connections depend mainly on the concrete’s strength and the provided reinforcements. This study investigates numerically the role of low-strength concrete in beam-column joints utilizing ABAQUS software. In this simulation, a newly devel...

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Autores principales:	Basem S. Abdelwahed, Mosbeh R. Kaloop, Waleed E. El-Demerdash
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	beam-column joint low-strength concrete extreme loading numerical modeling stirrups shear strength Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/3630e3fc2f3a49ec9c70f437d8416632
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id	oai:doaj.org-article:3630e3fc2f3a49ec9c70f437d8416632
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spelling	oai:doaj.org-article:3630e3fc2f3a49ec9c70f437d84166322021-11-25T17:00:47ZNonlinear Numerical Assessment of Exterior Beam-Column Connections with Low-Strength Concrete10.3390/buildings111105622075-5309https://doaj.org/article/3630e3fc2f3a49ec9c70f437d84166322021-11-01T00:00:00Zhttps://www.mdpi.com/2075-5309/11/11/562https://doaj.org/toc/2075-5309The ductility and capacity of reinforced concrete beam-column connections depend mainly on the concrete’s strength and the provided reinforcements. This study investigates numerically the role of low-strength concrete in beam-column joints utilizing ABAQUS software. In this simulation, a newly developed stress-inelastic strain relationship for both confined and unconfined low-strength concrete is used. This study recommended a specific value of the concrete dilation angle for both substandard and standard joints. Also, stirrups’ yield strength value was found to play an insignificant role in improving the shear resistance of such joints with low-strength. In addition, the joint shear strength prediction using empirical models that implicitly consider the stirrups contribution in improving joint resistance was found to be better than the prediction of other models that explicitly consider the stirrups’ presence. The numerical results also showed that the use of a diagonal steel haunch as a joint retrofitting technique significantly increases the joint shear capacity and changes its brittle shear failure into a ductile beam flexural failure.Basem S. AbdelwahedMosbeh R. KaloopWaleed E. El-DemerdashMDPI AGarticlebeam-column jointlow-strength concreteextreme loadingnumerical modelingstirrupsshear strengthBuilding constructionTH1-9745ENBuildings, Vol 11, Iss 562, p 562 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	beam-column joint low-strength concrete extreme loading numerical modeling stirrups shear strength Building construction TH1-9745
spellingShingle	beam-column joint low-strength concrete extreme loading numerical modeling stirrups shear strength Building construction TH1-9745 Basem S. Abdelwahed Mosbeh R. Kaloop Waleed E. El-Demerdash Nonlinear Numerical Assessment of Exterior Beam-Column Connections with Low-Strength Concrete
description	The ductility and capacity of reinforced concrete beam-column connections depend mainly on the concrete’s strength and the provided reinforcements. This study investigates numerically the role of low-strength concrete in beam-column joints utilizing ABAQUS software. In this simulation, a newly developed stress-inelastic strain relationship for both confined and unconfined low-strength concrete is used. This study recommended a specific value of the concrete dilation angle for both substandard and standard joints. Also, stirrups’ yield strength value was found to play an insignificant role in improving the shear resistance of such joints with low-strength. In addition, the joint shear strength prediction using empirical models that implicitly consider the stirrups contribution in improving joint resistance was found to be better than the prediction of other models that explicitly consider the stirrups’ presence. The numerical results also showed that the use of a diagonal steel haunch as a joint retrofitting technique significantly increases the joint shear capacity and changes its brittle shear failure into a ductile beam flexural failure.
format	article
author	Basem S. Abdelwahed Mosbeh R. Kaloop Waleed E. El-Demerdash
author_facet	Basem S. Abdelwahed Mosbeh R. Kaloop Waleed E. El-Demerdash
author_sort	Basem S. Abdelwahed
title	Nonlinear Numerical Assessment of Exterior Beam-Column Connections with Low-Strength Concrete
title_short	Nonlinear Numerical Assessment of Exterior Beam-Column Connections with Low-Strength Concrete
title_full	Nonlinear Numerical Assessment of Exterior Beam-Column Connections with Low-Strength Concrete
title_fullStr	Nonlinear Numerical Assessment of Exterior Beam-Column Connections with Low-Strength Concrete
title_full_unstemmed	Nonlinear Numerical Assessment of Exterior Beam-Column Connections with Low-Strength Concrete
title_sort	nonlinear numerical assessment of exterior beam-column connections with low-strength concrete
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3630e3fc2f3a49ec9c70f437d8416632
work_keys_str_mv	AT basemsabdelwahed nonlinearnumericalassessmentofexteriorbeamcolumnconnectionswithlowstrengthconcrete AT mosbehrkaloop nonlinearnumericalassessmentofexteriorbeamcolumnconnectionswithlowstrengthconcrete AT waleedeeldemerdash nonlinearnumericalassessmentofexteriorbeamcolumnconnectionswithlowstrengthconcrete
_version_	1718412769247625216

Nonlinear Numerical Assessment of Exterior Beam-Column Connections with Low-Strength Concrete

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