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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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CTU Central Library
2021-10-01
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| Series: | Acta Polytechnica |
| Subjects: | |
| Online Access: | https://ojs.cvut.cz/ojs/index.php/ap/article/view/7041 |
| _version_ | 1819001604911661056 |
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| author | Vasyl Karpiuk Yuliia Somina Fedir Karpiuk Irina Karpiuk |
| author_facet | Vasyl Karpiuk Yuliia Somina Fedir Karpiuk Irina Karpiuk |
| author_sort | Vasyl Karpiuk |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-20T22:51:52Z |
| format | Article |
| id | doaj.art-69631f61eb1c40d0aa5209cf3f29d9b3 |
| institution | Directory Open Access Journal |
| issn | 1210-2709 1805-2363 |
| language | English |
| last_indexed | 2024-12-20T22:51:52Z |
| publishDate | 2021-10-01 |
| publisher | CTU Central Library |
| record_format | Article |
| series | Acta Polytechnica |
| spelling | doaj.art-69631f61eb1c40d0aa5209cf3f29d9b32022-12-21T19:24:14ZengCTU Central LibraryActa Polytechnica1210-27091805-23632021-10-0161563364310.14311/AP.2021.61.06334279Peculiar aspects of cracking in prestressed reinforced concrete T-beamsVasyl Karpiuk0Yuliia Somina1Fedir Karpiuk2Irina Karpiuk3Odesa State Academy of Civil Engineering and Architecture, Faculty of Civil Engineering, Department of Reinforced Concrete Structures and Transport Facilities, Didrihsona Street 4, 65029 Odesa, UkraineOdesa State Academy of Civil Engineering and Architecture, Faculty of Civil Engineering, Department of Reinforced Concrete Structures and Transport Facilities, Didrihsona Street 4, 65029 Odesa, UkraineOdesa State Academy of Civil Engineering and Architecture, Faculty of Civil Engineering, Department of Reinforced Concrete Structures and Transport Facilities, Didrihsona Street 4, 65029 Odesa, UkraineOdesa State Academy of Civil Engineering and Architecture, Faculty of Civil Engineering, Department of Basements and Foundations, Didrihsona Street 4, 65029 Odesa, UkraineIn 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.https://ojs.cvut.cz/ojs/index.php/ap/article/view/7041reinforced concreteprestressingt-beaminclined sectionnormal crackdiagonal crackcrackingtransverse forcebending moment |
| spellingShingle | Vasyl Karpiuk Yuliia Somina Fedir Karpiuk Irina Karpiuk Peculiar aspects of cracking in prestressed reinforced concrete T-beams Acta Polytechnica reinforced concrete prestressing t-beam inclined section normal crack diagonal crack cracking transverse force bending moment |
| title | 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_short | Peculiar aspects of cracking in prestressed reinforced concrete T-beams |
| title_sort | peculiar aspects of cracking in prestressed reinforced concrete t beams |
| topic | reinforced concrete prestressing t-beam inclined section normal crack diagonal crack cracking transverse force bending moment |
| url | https://ojs.cvut.cz/ojs/index.php/ap/article/view/7041 |
| work_keys_str_mv | AT vasylkarpiuk peculiaraspectsofcrackinginprestressedreinforcedconcretetbeams AT yuliiasomina peculiaraspectsofcrackinginprestressedreinforcedconcretetbeams AT fedirkarpiuk peculiaraspectsofcrackinginprestressedreinforcedconcretetbeams AT irinakarpiuk peculiaraspectsofcrackinginprestressedreinforcedconcretetbeams |