Prediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures

Abstract The tensile strength of concrete has a great impact on the performance of concrete structures, especially for members exposed to high temperatures. The inclusion of steel fibers in concrete is one of the measures to retrieve the loss of tensile strength. The previous equations for the predi...

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Autores principales:	Mehrdad Abdi Moghadam, Ramezan Ali Izadifard
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Tensile strength Strength prediction Fiber content High temperature Steel fiber Regression Analysis Systems of building construction. Including fireproof construction, concrete construction TH1000-1725
Acceso en línea:	https://doaj.org/article/705e41295d914ef4bc77912e198b3103
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spelling	oai:doaj.org-article:705e41295d914ef4bc77912e198b31032021-11-28T12:29:52ZPrediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures10.1186/s40069-021-00485-61976-04852234-1315https://doaj.org/article/705e41295d914ef4bc77912e198b31032021-11-01T00:00:00Zhttps://doi.org/10.1186/s40069-021-00485-6https://doaj.org/toc/1976-0485https://doaj.org/toc/2234-1315Abstract The tensile strength of concrete has a great impact on the performance of concrete structures, especially for members exposed to high temperatures. The inclusion of steel fibers in concrete is one of the measures to retrieve the loss of tensile strength. The previous equations for the prediction of the tensile strength, are valid for conventional concrete and can predict the tensile strength after high-temperature exposure. Therefore, they are unsatisfactory for forecasting the tensile strength of plain and steel fiber reinforced concrete under high-temperature exposure. To establish a model that can effectively simulate the tensile strength of plain concrete, specimens with compressive strengths of 20–80 MPa are tested. Then by performing tensile strength tests on the specimens containing various content of steel fiber, an equation for prediction of the tensile strength at the ambient temperature is proposed. Meanwhile, the tensile strength tests are conducted at temperatures of 100–800 °C to develop a model for high-temperature exposure. The results indicate that an increase of compressive strength from 20 to 84 improves the tensile strength by 169.4%, and the incorporation of 0.25 and 0.5% of steel fibers can improve the tensile strength of normal concrete by 58.48 and 80.29% on average at the tested temperatures, respectively. Moreover, the proposed model is able to predict the tensile strength of normal and steel fiber reinforced concrete exposed to high temperatures accurately. This equation would help a wider application of the steel fibers in the construction industry with the risk of a fire accident.Mehrdad Abdi MoghadamRamezan Ali IzadifardSpringerOpenarticleTensile strengthStrength predictionFiber contentHigh temperatureSteel fiberRegression AnalysisSystems of building construction. Including fireproof construction, concrete constructionTH1000-1725ENInternational Journal of Concrete Structures and Materials, Vol 15, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Tensile strength Strength prediction Fiber content High temperature Steel fiber Regression Analysis Systems of building construction. Including fireproof construction, concrete construction TH1000-1725
spellingShingle	Tensile strength Strength prediction Fiber content High temperature Steel fiber Regression Analysis Systems of building construction. Including fireproof construction, concrete construction TH1000-1725 Mehrdad Abdi Moghadam Ramezan Ali Izadifard Prediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures
description	Abstract The tensile strength of concrete has a great impact on the performance of concrete structures, especially for members exposed to high temperatures. The inclusion of steel fibers in concrete is one of the measures to retrieve the loss of tensile strength. The previous equations for the prediction of the tensile strength, are valid for conventional concrete and can predict the tensile strength after high-temperature exposure. Therefore, they are unsatisfactory for forecasting the tensile strength of plain and steel fiber reinforced concrete under high-temperature exposure. To establish a model that can effectively simulate the tensile strength of plain concrete, specimens with compressive strengths of 20–80 MPa are tested. Then by performing tensile strength tests on the specimens containing various content of steel fiber, an equation for prediction of the tensile strength at the ambient temperature is proposed. Meanwhile, the tensile strength tests are conducted at temperatures of 100–800 °C to develop a model for high-temperature exposure. The results indicate that an increase of compressive strength from 20 to 84 improves the tensile strength by 169.4%, and the incorporation of 0.25 and 0.5% of steel fibers can improve the tensile strength of normal concrete by 58.48 and 80.29% on average at the tested temperatures, respectively. Moreover, the proposed model is able to predict the tensile strength of normal and steel fiber reinforced concrete exposed to high temperatures accurately. This equation would help a wider application of the steel fibers in the construction industry with the risk of a fire accident.
format	article
author	Mehrdad Abdi Moghadam Ramezan Ali Izadifard
author_facet	Mehrdad Abdi Moghadam Ramezan Ali Izadifard
author_sort	Mehrdad Abdi Moghadam
title	Prediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures
title_short	Prediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures
title_full	Prediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures
title_fullStr	Prediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures
title_full_unstemmed	Prediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures
title_sort	prediction of the tensile strength of normal and steel fiber reinforced concrete exposed to high temperatures
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/705e41295d914ef4bc77912e198b3103
work_keys_str_mv	AT mehrdadabdimoghadam predictionofthetensilestrengthofnormalandsteelfiberreinforcedconcreteexposedtohightemperatures AT ramezanaliizadifard predictionofthetensilestrengthofnormalandsteelfiberreinforcedconcreteexposedtohightemperatures
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Prediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures

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