Flexural Strengthening of Continuous RC Beams Using HPFRCC Precast Laminates

In this study, the use of precast laminates, made of high-performance fiber-reinforced cementitious composite (HPFRCC), was investigated for strengthening of continuous reinforced concrete (RC) beams. HPFRCCs are characterized by their high tensile strength and remarkable durability properties. To f...

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Autores principales:	Alireza Bitaraf, Ali Kheyroddin, Mohammad Kazem Sharbatdar
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2021
Materias:	hpfrcc rc continuous beam strengthening load-bearing capacity ductility energy-absorption precast laminate Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/9425af4917624e319d7e09ab5e4187d3
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spelling	oai:doaj.org-article:9425af4917624e319d7e09ab5e4187d32021-11-08T15:55:01ZFlexural Strengthening of Continuous RC Beams Using HPFRCC Precast Laminates2476-39772538-261610.22065/jsce.2019.194981.1909https://doaj.org/article/9425af4917624e319d7e09ab5e4187d32021-08-01T00:00:00Zhttps://www.jsce.ir/article_94036_a2fdc0790ab6d5c456ea72f1bbb1cf3d.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616In this study, the use of precast laminates, made of high-performance fiber-reinforced cementitious composite (HPFRCC), was investigated for strengthening of continuous reinforced concrete (RC) beams. HPFRCCs are characterized by their high tensile strength and remarkable durability properties. To find the effect of strengthening, eight continuous (two-bay) RC beams were tested under monotonic load in the middle of spans; two of which were the control specimens and six of which were strengthened specimens. The HPFRCC laminates were prefabricated with 25 mm thickness and bonded to the tensile surface of beams using epoxy and mechanical anchorage. The longitudinal bars were added to laminates in four specimens to survey their effect on strengthened beams. Comparison of results declared that the load carrying capacity was increased up to 59 % in strengthened beams. Ductility index of the strengthened beams was acceptable, and also up to 35 % growth in energy-absorption capacity was observed. Applying laminates to the tensile surface delayed crack propagation and decreased the midspan deflection. Also, stiffness of specimens in the cracked concrete stage was increased up to 78 % that led to decrease the service deflection. It is concluded that the use of HPFRCC laminates, especially in case of applying longitudinal bars, is an efficient method to enhance the flexural capacity of continuous RC beams.Alireza BitarafAli KheyroddinMohammad Kazem SharbatdarIranian Society of Structrual Engineering (ISSE)articlehpfrccrc continuous beamstrengtheningload-bearing capacityductilityenergy-absorptionprecast laminateBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 8, Iss 6, Pp 221-240 (2021)
institution	DOAJ
collection	DOAJ
language	FA
topic	hpfrcc rc continuous beam strengthening load-bearing capacity ductility energy-absorption precast laminate Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	hpfrcc rc continuous beam strengthening load-bearing capacity ductility energy-absorption precast laminate Bridge engineering TG1-470 Building construction TH1-9745 Alireza Bitaraf Ali Kheyroddin Mohammad Kazem Sharbatdar Flexural Strengthening of Continuous RC Beams Using HPFRCC Precast Laminates
description	In this study, the use of precast laminates, made of high-performance fiber-reinforced cementitious composite (HPFRCC), was investigated for strengthening of continuous reinforced concrete (RC) beams. HPFRCCs are characterized by their high tensile strength and remarkable durability properties. To find the effect of strengthening, eight continuous (two-bay) RC beams were tested under monotonic load in the middle of spans; two of which were the control specimens and six of which were strengthened specimens. The HPFRCC laminates were prefabricated with 25 mm thickness and bonded to the tensile surface of beams using epoxy and mechanical anchorage. The longitudinal bars were added to laminates in four specimens to survey their effect on strengthened beams. Comparison of results declared that the load carrying capacity was increased up to 59 % in strengthened beams. Ductility index of the strengthened beams was acceptable, and also up to 35 % growth in energy-absorption capacity was observed. Applying laminates to the tensile surface delayed crack propagation and decreased the midspan deflection. Also, stiffness of specimens in the cracked concrete stage was increased up to 78 % that led to decrease the service deflection. It is concluded that the use of HPFRCC laminates, especially in case of applying longitudinal bars, is an efficient method to enhance the flexural capacity of continuous RC beams.
format	article
author	Alireza Bitaraf Ali Kheyroddin Mohammad Kazem Sharbatdar
author_facet	Alireza Bitaraf Ali Kheyroddin Mohammad Kazem Sharbatdar
author_sort	Alireza Bitaraf
title	Flexural Strengthening of Continuous RC Beams Using HPFRCC Precast Laminates
title_short	Flexural Strengthening of Continuous RC Beams Using HPFRCC Precast Laminates
title_full	Flexural Strengthening of Continuous RC Beams Using HPFRCC Precast Laminates
title_fullStr	Flexural Strengthening of Continuous RC Beams Using HPFRCC Precast Laminates
title_full_unstemmed	Flexural Strengthening of Continuous RC Beams Using HPFRCC Precast Laminates
title_sort	flexural strengthening of continuous rc beams using hpfrcc precast laminates
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2021
url	https://doaj.org/article/9425af4917624e319d7e09ab5e4187d3
work_keys_str_mv	AT alirezabitaraf flexuralstrengtheningofcontinuousrcbeamsusinghpfrccprecastlaminates AT alikheyroddin flexuralstrengtheningofcontinuousrcbeamsusinghpfrccprecastlaminates AT mohammadkazemsharbatdar flexuralstrengtheningofcontinuousrcbeamsusinghpfrccprecastlaminates
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Flexural Strengthening of Continuous RC Beams Using HPFRCC Precast Laminates

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