Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High-Strength Concrete Hollow Beams

In this study, an experimental work was directed toward comparing the flexural behavior of solid and hollow steel fiber-reinforced concrete beams. For this purpose, eight square cross-sectional beam specimens, four solid and four hollow, were prepared. One concrete mixture with four different steel...

Full description

Bibliographic Details
Main Authors: Ahmmad Abbass, Sallal Abid, Mustafa Özakça
Format: Article
Language:English
Published: Hindawi Limited 2019-01-01
Series:Advances in Civil Engineering
Online Access:http://dx.doi.org/10.1155/2019/8390345
id doaj-aafe877f94464189b2ce6b837ed5bbac
record_format Article
spelling doaj-aafe877f94464189b2ce6b837ed5bbac2020-11-24T21:16:23ZengHindawi LimitedAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/83903458390345Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High-Strength Concrete Hollow BeamsAhmmad Abbass0Sallal Abid1Mustafa Özakça2Department of Civil Engineering, Gaziantep University, Gaziantep, TurkeyDepartment of Civil Engineering, Wasit University, Kut, IraqDepartment of Civil Engineering, Gaziantep University, Gaziantep, TurkeyIn this study, an experimental work was directed toward comparing the flexural behavior of solid and hollow steel fiber-reinforced concrete beams. For this purpose, eight square cross-sectional beam specimens, four solid and four hollow, were prepared. One concrete mixture with four different steel fiber contents of 0, 0.5, 1.0, and 1.5% were used. The side length of the central square hole was 80 mm, whereas the cross-sectional side length was 150 mm. All beams were tested under four-point monotonic loading until failure. In addition to the solid and hollow beams, cylinders were cast to evaluate the compressive strength, splitting tensile strength, and modulus of elasticity, whereas prisms were used to conduct the fracture test. The test results showed that all fibrous beams failed in flexure, whereas those without fiber exhibited flexural-shear failure. In general, the flexural behavior of fibrous-beams was superior to that of beams without fiber. The hollow beams with fiber contents of 0, 0.5, and 1.0% were observed to withstand lower loads at cracking, yielding, and peak stages compared with their corresponding solid beams; this was not the case for the 1.5% fiber hollow beam, which exhibited a higher peak load than its corresponding solid beam. Although all eight beams exhibited ductility indices higher than 3.7, hollow beams exhibited better ductility than solid beams, showing higher ductility index values.http://dx.doi.org/10.1155/2019/8390345
collection DOAJ
language English
format Article
sources DOAJ
author Ahmmad Abbass
Sallal Abid
Mustafa Özakça
spellingShingle Ahmmad Abbass
Sallal Abid
Mustafa Özakça
Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High-Strength Concrete Hollow Beams
Advances in Civil Engineering
author_facet Ahmmad Abbass
Sallal Abid
Mustafa Özakça
author_sort Ahmmad Abbass
title Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High-Strength Concrete Hollow Beams
title_short Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High-Strength Concrete Hollow Beams
title_full Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High-Strength Concrete Hollow Beams
title_fullStr Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High-Strength Concrete Hollow Beams
title_full_unstemmed Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High-Strength Concrete Hollow Beams
title_sort experimental investigation on the effect of steel fibers on the flexural behavior and ductility of high-strength concrete hollow beams
publisher Hindawi Limited
series Advances in Civil Engineering
issn 1687-8086
1687-8094
publishDate 2019-01-01
description In this study, an experimental work was directed toward comparing the flexural behavior of solid and hollow steel fiber-reinforced concrete beams. For this purpose, eight square cross-sectional beam specimens, four solid and four hollow, were prepared. One concrete mixture with four different steel fiber contents of 0, 0.5, 1.0, and 1.5% were used. The side length of the central square hole was 80 mm, whereas the cross-sectional side length was 150 mm. All beams were tested under four-point monotonic loading until failure. In addition to the solid and hollow beams, cylinders were cast to evaluate the compressive strength, splitting tensile strength, and modulus of elasticity, whereas prisms were used to conduct the fracture test. The test results showed that all fibrous beams failed in flexure, whereas those without fiber exhibited flexural-shear failure. In general, the flexural behavior of fibrous-beams was superior to that of beams without fiber. The hollow beams with fiber contents of 0, 0.5, and 1.0% were observed to withstand lower loads at cracking, yielding, and peak stages compared with their corresponding solid beams; this was not the case for the 1.5% fiber hollow beam, which exhibited a higher peak load than its corresponding solid beam. Although all eight beams exhibited ductility indices higher than 3.7, hollow beams exhibited better ductility than solid beams, showing higher ductility index values.
url http://dx.doi.org/10.1155/2019/8390345
work_keys_str_mv AT ahmmadabbass experimentalinvestigationontheeffectofsteelfibersontheflexuralbehaviorandductilityofhighstrengthconcretehollowbeams
AT sallalabid experimentalinvestigationontheeffectofsteelfibersontheflexuralbehaviorandductilityofhighstrengthconcretehollowbeams
AT mustafaozakca experimentalinvestigationontheeffectofsteelfibersontheflexuralbehaviorandductilityofhighstrengthconcretehollowbeams
_version_ 1726015643403157504