Peculiar aspects of cracking in prestressed reinforced concrete T-beams

In order to study the cracking of prestressed reinforced concrete T-shaped beam structures, the authors planned and carried out a full-scale experiment with five variable factors. The following factors were chosen as variable factors: the relative span of the shear, the ratio of the table overhang w...

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Autores principales:	Vasyl Karpiuk, Yuliia Somina, Fedir Karpiuk, Irina Karpiuk
Formato:	article
Lenguaje:	EN
Publicado:	CTU Central Library 2021
Materias:	reinforced concrete prestressing t-beam inclined section normal crack diagonal crack cracking transverse force bending moment Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/69631f61eb1c40d0aa5209cf3f29d9b3
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id	oai:doaj.org-article:69631f61eb1c40d0aa5209cf3f29d9b3
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spelling	oai:doaj.org-article:69631f61eb1c40d0aa5209cf3f29d9b32021-11-18T13:55:36ZPeculiar aspects of cracking in prestressed reinforced concrete T-beams1210-27091805-236310.14311/AP.2021.61.0633https://doaj.org/article/69631f61eb1c40d0aa5209cf3f29d9b32021-10-01T00:00:00Zhttps://ojs.cvut.cz/ojs/index.php/ap/article/view/7041https://doaj.org/toc/1210-2709https://doaj.org/toc/1805-2363In order to study the cracking of prestressed reinforced concrete T-shaped beam structures, the authors planned and carried out a full-scale experiment with five variable factors. The following factors were chosen as variable factors: the relative span of the shear, the ratio of the table overhang width to the thickness of the beam rib, the ratio of the table overhang thickness to the working height of the beam section, the coefficient of transverse reinforcement, the level of prestressing in the working reinforcement. The article describes the cracking process and the destruction of test beams. It was found that the loading level of an opening of inclined cracks is 53% larger than the loading level of a normal crack opening. Mathematical models of bending moments and transverse forces of cracking were built using the “COMPEX” software. Also, the mathematical models of the crack opening width and the projection length of a dangerous inclined crack were obtained. These models are based on the experimental data. Analysing the obtained models, the complex influence of variable factors on the main parameters of crack formation and crack resistance was established. In particular, it was found that the prestress level in the working reinforcement has the greatest effect on the bending moment of cracking. In this case, the value of the shear force of cracking significantly depends on both the prestressing level in the reinforcement and the relative span of the shear. On the basis of the experimental data, the empirical expression is obtained for determining the projection of a dangerous inclined crack for prestressed reinforced concrete T-shaped beams. The resulting equation can be used to calculate a shear reinforcement.Vasyl KarpiukYuliia SominaFedir KarpiukIrina KarpiukCTU Central Libraryarticlereinforced concreteprestressingt-beaminclined sectionnormal crackdiagonal crackcrackingtransverse forcebending momentEngineering (General). Civil engineering (General)TA1-2040ENActa Polytechnica, Vol 61, Iss 5, Pp 633-643 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	reinforced concrete prestressing t-beam inclined section normal crack diagonal crack cracking transverse force bending moment Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	reinforced concrete prestressing t-beam inclined section normal crack diagonal crack cracking transverse force bending moment Engineering (General). Civil engineering (General) TA1-2040 Vasyl Karpiuk Yuliia Somina Fedir Karpiuk Irina Karpiuk Peculiar aspects of cracking in prestressed reinforced concrete T-beams
description	In order to study the cracking of prestressed reinforced concrete T-shaped beam structures, the authors planned and carried out a full-scale experiment with five variable factors. The following factors were chosen as variable factors: the relative span of the shear, the ratio of the table overhang width to the thickness of the beam rib, the ratio of the table overhang thickness to the working height of the beam section, the coefficient of transverse reinforcement, the level of prestressing in the working reinforcement. The article describes the cracking process and the destruction of test beams. It was found that the loading level of an opening of inclined cracks is 53% larger than the loading level of a normal crack opening. Mathematical models of bending moments and transverse forces of cracking were built using the “COMPEX” software. Also, the mathematical models of the crack opening width and the projection length of a dangerous inclined crack were obtained. These models are based on the experimental data. Analysing the obtained models, the complex influence of variable factors on the main parameters of crack formation and crack resistance was established. In particular, it was found that the prestress level in the working reinforcement has the greatest effect on the bending moment of cracking. In this case, the value of the shear force of cracking significantly depends on both the prestressing level in the reinforcement and the relative span of the shear. On the basis of the experimental data, the empirical expression is obtained for determining the projection of a dangerous inclined crack for prestressed reinforced concrete T-shaped beams. The resulting equation can be used to calculate a shear reinforcement.
format	article
author	Vasyl Karpiuk Yuliia Somina Fedir Karpiuk Irina Karpiuk
author_facet	Vasyl Karpiuk Yuliia Somina Fedir Karpiuk Irina Karpiuk
author_sort	Vasyl Karpiuk
title	Peculiar aspects of cracking in prestressed reinforced concrete T-beams
title_short	Peculiar aspects of cracking in prestressed reinforced concrete T-beams
title_full	Peculiar aspects of cracking in prestressed reinforced concrete T-beams
title_fullStr	Peculiar aspects of cracking in prestressed reinforced concrete T-beams
title_full_unstemmed	Peculiar aspects of cracking in prestressed reinforced concrete T-beams
title_sort	peculiar aspects of cracking in prestressed reinforced concrete t-beams
publisher	CTU Central Library
publishDate	2021
url	https://doaj.org/article/69631f61eb1c40d0aa5209cf3f29d9b3
work_keys_str_mv	AT vasylkarpiuk peculiaraspectsofcrackinginprestressedreinforcedconcretetbeams AT yuliiasomina peculiaraspectsofcrackinginprestressedreinforcedconcretetbeams AT fedirkarpiuk peculiaraspectsofcrackinginprestressedreinforcedconcretetbeams AT irinakarpiuk peculiaraspectsofcrackinginprestressedreinforcedconcretetbeams
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Peculiar aspects of cracking in prestressed reinforced concrete T-beams

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