Increasing the Capacity of Existing Bridges by Using Unbonded Prestressing Technology: A Case Study
External posttensioning or unbonded prestressing was found to be a powerful tool for retrofitting and for increasing the life extension of existing structures. Since the 1950s, this technique of reinforcement was applied with success to bridge structures in many countries, and was found to provide a...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2014/840902 |
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| author | Antonino Recupero Nino Spinella Piero Colajanni Cosimo D. Scilipoti |
| author_facet | Antonino Recupero Nino Spinella Piero Colajanni Cosimo D. Scilipoti |
| author_sort | Antonino Recupero |
| collection | DOAJ |
| description | External posttensioning or unbonded prestressing was found to be a powerful tool for retrofitting and for increasing the life extension of existing structures. Since the 1950s, this technique of reinforcement was applied with success to bridge structures in many countries, and was found to provide an efficient and economic solution for a wide range of bridge types and conditions. Unbonded prestressing is defined as a system in which the post-tensioning tendons or bars are located outside the concrete cross-section and the prestressing forces are transmitted to the girder through the end anchorages, deviators, or saddles. In response to the demand for a faster and more efficient transportation system, there was a steady increase in the weight and volume of traffic throughout the world. Besides increases in legal vehicle loads, the overloading of vehicles is a common problem and it must also be considered when designing or assessing bridges. As a result, many bridges are now required to carry loads significantly greater than their original design loads; and their deck results still deteriorated by cracking of concrete, corrosion of rebars, snapping of tendons, and so forth. In the following, a case study about a railway bridge retrofitted by external posttensioning technique will be illustrated. |
| format | Article |
| id | doaj-art-9234c312c4484d9eb5e8665fbedf00bc |
| institution | OA Journals |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-9234c312c4484d9eb5e8665fbedf00bc2025-08-20T02:10:04ZengWileyAdvances in Civil Engineering1687-80861687-80942014-01-01201410.1155/2014/840902840902Increasing the Capacity of Existing Bridges by Using Unbonded Prestressing Technology: A Case StudyAntonino Recupero0Nino Spinella1Piero Colajanni2Cosimo D. Scilipoti3Dipartimento di Ingegneria Civile, Informatica, Edile, Ambientale e Matematica Applicata, Università di Messina, Contrada di Dio, Villaggio S. Agata, 98166 Messina, ItalyDipartimento di Ingegneria Civile, Informatica, Edile, Ambientale e Matematica Applicata, Università di Messina, Contrada di Dio, Villaggio S. Agata, 98166 Messina, ItalyDipartimento di Ingegneria Civile, Ambientale, Aerospaziale e dei Materiali (DICAM), Università di Palermo, Viale delle Scienze, 90128 Palermo, ItalyR&S Engineering S. R. L., Via S. Francesco di Paola 264, Barcellona P.G., 98051 Messina, ItalyExternal posttensioning or unbonded prestressing was found to be a powerful tool for retrofitting and for increasing the life extension of existing structures. Since the 1950s, this technique of reinforcement was applied with success to bridge structures in many countries, and was found to provide an efficient and economic solution for a wide range of bridge types and conditions. Unbonded prestressing is defined as a system in which the post-tensioning tendons or bars are located outside the concrete cross-section and the prestressing forces are transmitted to the girder through the end anchorages, deviators, or saddles. In response to the demand for a faster and more efficient transportation system, there was a steady increase in the weight and volume of traffic throughout the world. Besides increases in legal vehicle loads, the overloading of vehicles is a common problem and it must also be considered when designing or assessing bridges. As a result, many bridges are now required to carry loads significantly greater than their original design loads; and their deck results still deteriorated by cracking of concrete, corrosion of rebars, snapping of tendons, and so forth. In the following, a case study about a railway bridge retrofitted by external posttensioning technique will be illustrated.http://dx.doi.org/10.1155/2014/840902 |
| spellingShingle | Antonino Recupero Nino Spinella Piero Colajanni Cosimo D. Scilipoti Increasing the Capacity of Existing Bridges by Using Unbonded Prestressing Technology: A Case Study Advances in Civil Engineering |
| title | Increasing the Capacity of Existing Bridges by Using Unbonded Prestressing Technology: A Case Study |
| title_full | Increasing the Capacity of Existing Bridges by Using Unbonded Prestressing Technology: A Case Study |
| title_fullStr | Increasing the Capacity of Existing Bridges by Using Unbonded Prestressing Technology: A Case Study |
| title_full_unstemmed | Increasing the Capacity of Existing Bridges by Using Unbonded Prestressing Technology: A Case Study |
| title_short | Increasing the Capacity of Existing Bridges by Using Unbonded Prestressing Technology: A Case Study |
| title_sort | increasing the capacity of existing bridges by using unbonded prestressing technology a case study |
| url | http://dx.doi.org/10.1155/2014/840902 |
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