Structural reliability of existing rc beams strengthened with UHPFRC tensile layers
A methodology for reliability analysis of reinforced concrete (RC) beams strengthened with ultra high-performance fibre reinforced concrete (UHPFRC) tensile layers is presented. The proposed methodology includes stochastic stress-block analysis of a section, assuming a perfect bond between the RC be...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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CTU Central Library
2022-08-01
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| Series: | Acta Polytechnica CTU Proceedings |
| Subjects: | |
| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/8409 |
| _version_ | 1797995261832724480 |
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| author | Lenganji Simwanda Nico De Koker Celeste Viljoen Adewumi John Babafemi |
| author_facet | Lenganji Simwanda Nico De Koker Celeste Viljoen Adewumi John Babafemi |
| author_sort | Lenganji Simwanda |
| collection | DOAJ |
| description | A methodology for reliability analysis of reinforced concrete (RC) beams strengthened with ultra high-performance fibre reinforced concrete (UHPFRC) tensile layers is presented. The proposed methodology includes stochastic stress-block analysis of a section, assuming a perfect bond between the RC beam and the UHPFRC layer. Annual reliability analysis of the RC beam before and after the strengthening operation is conducted. Deterioration induced by chloride corrosion is incorporated into the analysis via a chloride induced corrosion model based on Fick’s law of diffusion and described stochastically to account for the epistemic uncertainty in the time to corrosion initiation and rate of corrosion. A plot for determining the required thickness of the UHPFRC tensile layer to upgrade to the required reliability level is also given, considering the time from construction to when the strengthening operation is conducted. The proposed approach is easy to apply for routine practice. |
| first_indexed | 2024-04-11T09:58:43Z |
| format | Article |
| id | doaj.art-b6ef5932ea6b40f19fe662a56336e81a |
| institution | Directory Open Access Journal |
| issn | 2336-5382 |
| language | English |
| last_indexed | 2024-04-11T09:58:43Z |
| publishDate | 2022-08-01 |
| publisher | CTU Central Library |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj.art-b6ef5932ea6b40f19fe662a56336e81a2022-12-22T04:30:29ZengCTU Central LibraryActa Polytechnica CTU Proceedings2336-53822022-08-013619119710.14311/APP.2022.36.01915649Structural reliability of existing rc beams strengthened with UHPFRC tensile layersLenganji Simwanda0Nico De Koker1Celeste Viljoen2Adewumi John Babafemi3Stellenbosch University, Department of Civil Engineering, Private Bag X1, Matieland 7602, South AfricaStellenbosch University, Department of Civil Engineering, Private Bag X1, Matieland 7602, South AfricaStellenbosch University, Department of Civil Engineering, Private Bag X1, Matieland 7602, South AfricaStellenbosch University, Department of Civil Engineering, Private Bag X1, Matieland 7602, South AfricaA methodology for reliability analysis of reinforced concrete (RC) beams strengthened with ultra high-performance fibre reinforced concrete (UHPFRC) tensile layers is presented. The proposed methodology includes stochastic stress-block analysis of a section, assuming a perfect bond between the RC beam and the UHPFRC layer. Annual reliability analysis of the RC beam before and after the strengthening operation is conducted. Deterioration induced by chloride corrosion is incorporated into the analysis via a chloride induced corrosion model based on Fick’s law of diffusion and described stochastically to account for the epistemic uncertainty in the time to corrosion initiation and rate of corrosion. A plot for determining the required thickness of the UHPFRC tensile layer to upgrade to the required reliability level is also given, considering the time from construction to when the strengthening operation is conducted. The proposed approach is easy to apply for routine practice.https://ojs.cvut.cz/ojs/index.php/APP/article/view/8409corrosion damagerehabilitation of existing structuresreliability analysisuhpfrc tensile layers |
| spellingShingle | Lenganji Simwanda Nico De Koker Celeste Viljoen Adewumi John Babafemi Structural reliability of existing rc beams strengthened with UHPFRC tensile layers Acta Polytechnica CTU Proceedings corrosion damage rehabilitation of existing structures reliability analysis uhpfrc tensile layers |
| title | Structural reliability of existing rc beams strengthened with UHPFRC tensile layers |
| title_full | Structural reliability of existing rc beams strengthened with UHPFRC tensile layers |
| title_fullStr | Structural reliability of existing rc beams strengthened with UHPFRC tensile layers |
| title_full_unstemmed | Structural reliability of existing rc beams strengthened with UHPFRC tensile layers |
| title_short | Structural reliability of existing rc beams strengthened with UHPFRC tensile layers |
| title_sort | structural reliability of existing rc beams strengthened with uhpfrc tensile layers |
| topic | corrosion damage rehabilitation of existing structures reliability analysis uhpfrc tensile layers |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/8409 |
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