Experimental investigation on exterior RC beam-column connections subjected to cyclic loading using steel and shape memory alloy (SMA) reinforcing bars

In the present Experimental research, the behavior of exterior RC beam-column connections subjected to cyclic loading is studied using steel and shape memory alloy (SMA) reinforcing bars. In this research, 8 specimens of exterior RC beam-column connections were tested in which four specimens include...

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Autores principales:	Hossein Rezaee Azariani, mohammad Reza Esfahani, Hashem Shariatmadar
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	shape memory alloy (sma) reinforced concrete beam-column connection superelastic effect cyclic loading Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/dfdcd0c1559344b8b19d63e9d65e1a44
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spelling	oai:doaj.org-article:dfdcd0c1559344b8b19d63e9d65e1a442021-11-08T15:52:40ZExperimental investigation on exterior RC beam-column connections subjected to cyclic loading using steel and shape memory alloy (SMA) reinforcing bars2476-39772538-261610.22065/jsce.2018.109758.1405https://doaj.org/article/dfdcd0c1559344b8b19d63e9d65e1a442019-08-01T00:00:00Zhttps://www.jsce.ir/article_60362_1ee11f212319a05a4d624a1ef1d2f9c0.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616In the present Experimental research, the behavior of exterior RC beam-column connections subjected to cyclic loading is studied using steel and shape memory alloy (SMA) reinforcing bars. In this research, 8 specimens of exterior RC beam-column connections were tested in which four specimens included SMA reinforcing bars and the remaining four specimens included steel bars. The confinement of beam longitudinal bars was different in the connections. Also, two types of concretes were used with the strengths 30 and 45 MPa, respectively.The specimens were tested under cyclic loading. The results of the research show that the specimens with SMA reinforcing bars can return to their initial shape after tolerating large displacements. In these specimens, the energy dissipation is satisfactory and the decrease in the residual deformation is significant. According to the superelastic behavior of the SMA reinforcing bars, the width of cracks is not significant in the connection core and cyclic loading reduced the cracks in the connection core. As the cyclic loading increased, bending failure occurred in the beam outside of the connection core. As the concrete strength and confinement value increased, bending failure still occurred in the beam outside of the connection core. In the beam-column connection with steel bars, shear failure occurred in the connection core. However, as the concrete strength and confinement increased, bending failure occurred in the beam outside of the connection core. Plastic hinge length in the connecting beams were calculated in the specimens with SMA and steel bars by empirical equations and compared with the test results. It was shown that Paulay and Priestley equations were suitable to be used for concrete connections with different bars.Hossein Rezaee Azarianimohammad Reza EsfahaniHashem ShariatmadarIranian Society of Structrual Engineering (ISSE)articleshape memory alloy (sma)reinforced concretebeam-column connectionsuperelastic effectcyclic loadingBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره ویژه 2, Pp 149-174 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	shape memory alloy (sma) reinforced concrete beam-column connection superelastic effect cyclic loading Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	shape memory alloy (sma) reinforced concrete beam-column connection superelastic effect cyclic loading Bridge engineering TG1-470 Building construction TH1-9745 Hossein Rezaee Azariani mohammad Reza Esfahani Hashem Shariatmadar Experimental investigation on exterior RC beam-column connections subjected to cyclic loading using steel and shape memory alloy (SMA) reinforcing bars
description	In the present Experimental research, the behavior of exterior RC beam-column connections subjected to cyclic loading is studied using steel and shape memory alloy (SMA) reinforcing bars. In this research, 8 specimens of exterior RC beam-column connections were tested in which four specimens included SMA reinforcing bars and the remaining four specimens included steel bars. The confinement of beam longitudinal bars was different in the connections. Also, two types of concretes were used with the strengths 30 and 45 MPa, respectively.The specimens were tested under cyclic loading. The results of the research show that the specimens with SMA reinforcing bars can return to their initial shape after tolerating large displacements. In these specimens, the energy dissipation is satisfactory and the decrease in the residual deformation is significant. According to the superelastic behavior of the SMA reinforcing bars, the width of cracks is not significant in the connection core and cyclic loading reduced the cracks in the connection core. As the cyclic loading increased, bending failure occurred in the beam outside of the connection core. As the concrete strength and confinement value increased, bending failure still occurred in the beam outside of the connection core. In the beam-column connection with steel bars, shear failure occurred in the connection core. However, as the concrete strength and confinement increased, bending failure occurred in the beam outside of the connection core. Plastic hinge length in the connecting beams were calculated in the specimens with SMA and steel bars by empirical equations and compared with the test results. It was shown that Paulay and Priestley equations were suitable to be used for concrete connections with different bars.
format	article
author	Hossein Rezaee Azariani mohammad Reza Esfahani Hashem Shariatmadar
author_facet	Hossein Rezaee Azariani mohammad Reza Esfahani Hashem Shariatmadar
author_sort	Hossein Rezaee Azariani
title	Experimental investigation on exterior RC beam-column connections subjected to cyclic loading using steel and shape memory alloy (SMA) reinforcing bars
title_short	Experimental investigation on exterior RC beam-column connections subjected to cyclic loading using steel and shape memory alloy (SMA) reinforcing bars
title_full	Experimental investigation on exterior RC beam-column connections subjected to cyclic loading using steel and shape memory alloy (SMA) reinforcing bars
title_fullStr	Experimental investigation on exterior RC beam-column connections subjected to cyclic loading using steel and shape memory alloy (SMA) reinforcing bars
title_full_unstemmed	Experimental investigation on exterior RC beam-column connections subjected to cyclic loading using steel and shape memory alloy (SMA) reinforcing bars
title_sort	experimental investigation on exterior rc beam-column connections subjected to cyclic loading using steel and shape memory alloy (sma) reinforcing bars
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/dfdcd0c1559344b8b19d63e9d65e1a44
work_keys_str_mv	AT hosseinrezaeeazariani experimentalinvestigationonexteriorrcbeamcolumnconnectionssubjectedtocyclicloadingusingsteelandshapememoryalloysmareinforcingbars AT mohammadrezaesfahani experimentalinvestigationonexteriorrcbeamcolumnconnectionssubjectedtocyclicloadingusingsteelandshapememoryalloysmareinforcingbars AT hashemshariatmadar experimentalinvestigationonexteriorrcbeamcolumnconnectionssubjectedtocyclicloadingusingsteelandshapememoryalloysmareinforcingbars
_version_	1718441708093440000

Experimental investigation on exterior RC beam-column connections subjected to cyclic loading using steel and shape memory alloy (SMA) reinforcing bars

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