Investigation on the Behavior of Concrete with Optimum Percentage of Steel Fiber, Microsilica, Fly Ash and Hybrid Fiber under Different Loading Pattern

While the fibers in concrete cause soft rupture, the compressive and tensile samples are not ruptured after failure. This is one of the benefits of metallic fibers, especially the sinusoidal and hooked fibers: using these gives residents the opportunity to escape during an earthquake. In addition to...

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Autores principales:	Javad Esfandiari, Omid Heidari
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2021
Materias:	buckling restrained braces metal fibers polypropylene fibers ductility energy absorption Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/8561be13ed254a069392599acf650695
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spelling	oai:doaj.org-article:8561be13ed254a069392599acf6506952021-11-08T15:55:01ZInvestigation on the Behavior of Concrete with Optimum Percentage of Steel Fiber, Microsilica, Fly Ash and Hybrid Fiber under Different Loading Pattern2476-39772538-261610.22065/jsce.2020.182908.1840https://doaj.org/article/8561be13ed254a069392599acf6506952021-08-01T00:00:00Zhttps://www.jsce.ir/article_103744_1760bc01f047798196c53f3beb60412d.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616While the fibers in concrete cause soft rupture, the compressive and tensile samples are not ruptured after failure. This is one of the benefits of metallic fibers, especially the sinusoidal and hooked fibers: using these gives residents the opportunity to escape during an earthquake. In addition to positively impacting mechanical properties, metal fibers improve the matrix of concrete, provide ductility and response to impact load, and control crack width and propagation. Fly ash and micro-silica improve the durability and performance of concrete and are effective in protecting the environment: they can, thus, be used to replace cement. In this study, the samples’ compressive and tensile strength was prepared: they were of non-fibrous concrete and concrete containing steel fibers with 6 different percentages (0.4, 0.6, 0.8, 1, 1.2, 1.5). They were also composed of metallic fiber and polypropylene in three different compositions (0.3PP + 0.8SF, 0.4PP + 0.4SF, and 0.15PP + 1.5SF). These were investigated: seismic parameters were extracted after achieving the optimal percentage (the percentage with the highest compressive and tensile strength given economic considerations) under the loading protocol SAC/BD 97.02. This allowed investigation of the curves of hysteresis, energy absorption, lateral displacement, and effects of the use of these fibers. The major properties of pozzolanic materials were considered in the last step of this research: fly ash and microsilica were added to concrete containing metal fibers with the optimum percentage of metallic fibers. These were compared with concrete containing metallic fibers and non-fiber concrete. Thereafter, the appropriate percentage of cement replacement was determined so as to better understand the effect of the use of fly ash and microsilica in preventing the buckling of buckling restrained braces.Javad EsfandiariOmid HeidariIranian Society of Structrual Engineering (ISSE)articlebuckling restrained bracesmetal fiberspolypropylene fibersductilityenergy absorptionBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 8, Iss 6, Pp 130-150 (2021)
institution	DOAJ
collection	DOAJ
language	FA
topic	buckling restrained braces metal fibers polypropylene fibers ductility energy absorption Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	buckling restrained braces metal fibers polypropylene fibers ductility energy absorption Bridge engineering TG1-470 Building construction TH1-9745 Javad Esfandiari Omid Heidari Investigation on the Behavior of Concrete with Optimum Percentage of Steel Fiber, Microsilica, Fly Ash and Hybrid Fiber under Different Loading Pattern
description	While the fibers in concrete cause soft rupture, the compressive and tensile samples are not ruptured after failure. This is one of the benefits of metallic fibers, especially the sinusoidal and hooked fibers: using these gives residents the opportunity to escape during an earthquake. In addition to positively impacting mechanical properties, metal fibers improve the matrix of concrete, provide ductility and response to impact load, and control crack width and propagation. Fly ash and micro-silica improve the durability and performance of concrete and are effective in protecting the environment: they can, thus, be used to replace cement. In this study, the samples’ compressive and tensile strength was prepared: they were of non-fibrous concrete and concrete containing steel fibers with 6 different percentages (0.4, 0.6, 0.8, 1, 1.2, 1.5). They were also composed of metallic fiber and polypropylene in three different compositions (0.3PP + 0.8SF, 0.4PP + 0.4SF, and 0.15PP + 1.5SF). These were investigated: seismic parameters were extracted after achieving the optimal percentage (the percentage with the highest compressive and tensile strength given economic considerations) under the loading protocol SAC/BD 97.02. This allowed investigation of the curves of hysteresis, energy absorption, lateral displacement, and effects of the use of these fibers. The major properties of pozzolanic materials were considered in the last step of this research: fly ash and microsilica were added to concrete containing metal fibers with the optimum percentage of metallic fibers. These were compared with concrete containing metallic fibers and non-fiber concrete. Thereafter, the appropriate percentage of cement replacement was determined so as to better understand the effect of the use of fly ash and microsilica in preventing the buckling of buckling restrained braces.
format	article
author	Javad Esfandiari Omid Heidari
author_facet	Javad Esfandiari Omid Heidari
author_sort	Javad Esfandiari
title	Investigation on the Behavior of Concrete with Optimum Percentage of Steel Fiber, Microsilica, Fly Ash and Hybrid Fiber under Different Loading Pattern
title_short	Investigation on the Behavior of Concrete with Optimum Percentage of Steel Fiber, Microsilica, Fly Ash and Hybrid Fiber under Different Loading Pattern
title_full	Investigation on the Behavior of Concrete with Optimum Percentage of Steel Fiber, Microsilica, Fly Ash and Hybrid Fiber under Different Loading Pattern
title_fullStr	Investigation on the Behavior of Concrete with Optimum Percentage of Steel Fiber, Microsilica, Fly Ash and Hybrid Fiber under Different Loading Pattern
title_full_unstemmed	Investigation on the Behavior of Concrete with Optimum Percentage of Steel Fiber, Microsilica, Fly Ash and Hybrid Fiber under Different Loading Pattern
title_sort	investigation on the behavior of concrete with optimum percentage of steel fiber, microsilica, fly ash and hybrid fiber under different loading pattern
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2021
url	https://doaj.org/article/8561be13ed254a069392599acf650695
work_keys_str_mv	AT javadesfandiari investigationonthebehaviorofconcretewithoptimumpercentageofsteelfibermicrosilicaflyashandhybridfiberunderdifferentloadingpattern AT omidheidari investigationonthebehaviorofconcretewithoptimumpercentageofsteelfibermicrosilicaflyashandhybridfiberunderdifferentloadingpattern
_version_	1718441580937871360

Investigation on the Behavior of Concrete with Optimum Percentage of Steel Fiber, Microsilica, Fly Ash and Hybrid Fiber under Different Loading Pattern

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