Analysis of Short-Term Prestress Losses in Post-tensioned Structures Using Smart Strands
Abstract The proper estimation of prestressing force (PF) distribution is critical to ensure the safety and serviceability of prestressed concrete (PSC) structures. Although the PF distribution can be theoretically calculated based on certain predictive equations, the resulting accuracy of the theor...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-01-01
|
| Series: | International Journal of Concrete Structures and Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40069-021-00488-3 |
| _version_ | 1830206663396687872 |
|---|---|
| author | Sang-Hyun Kim Sung Yong Park Sung Tae Kim Se-Jin Jeon |
| author_facet | Sang-Hyun Kim Sung Yong Park Sung Tae Kim Se-Jin Jeon |
| author_sort | Sang-Hyun Kim |
| collection | DOAJ |
| description | Abstract The proper estimation of prestressing force (PF) distribution is critical to ensure the safety and serviceability of prestressed concrete (PSC) structures. Although the PF distribution can be theoretically calculated based on certain predictive equations, the resulting accuracy of the theoretical PF needs to be further validated by comparison with reliable test data. Therefore, a Smart Strand with fiber optic sensors embedded in a core wire was developed and applied to a full-scale specimen and two long-span PSC girder bridges in this study. The variation in PF distribution during tensioning and anchoring was measured using the Smart Strand and was analyzed by comparison with the theoretical distribution calculated using the predictive equations for short-term prestress losses. In particular, the provisions for anchorage seating loss and elastic shortening loss were reviewed and possible improvements were proposed. A new method to estimate the amount of anchorage slip based on real PF distributions revealed that the general assumption of 3–6-mm slip falls within a reasonable range. Finally, the sensitivity of the PF distribution to a few of the variables included in the equation of the elastic shortening loss was examined. The study results confirmed that the developed Smart Strand can be used to improve the design parameters or equations in PSC structures by overcoming the drawbacks of conventional sensing technologies. |
| first_indexed | 2024-12-18T04:17:36Z |
| format | Article |
| id | doaj.art-0f940165f341465897dd2f26a9e9b3eb |
| institution | Directory Open Access Journal |
| issn | 1976-0485 2234-1315 |
| language | English |
| last_indexed | 2024-12-18T04:17:36Z |
| publishDate | 2022-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Concrete Structures and Materials |
| spelling | doaj.art-0f940165f341465897dd2f26a9e9b3eb2022-12-21T21:21:19ZengSpringerOpenInternational Journal of Concrete Structures and Materials1976-04852234-13152022-01-0116111510.1186/s40069-021-00488-3Analysis of Short-Term Prestress Losses in Post-tensioned Structures Using Smart StrandsSang-Hyun Kim0Sung Yong Park1Sung Tae Kim2Se-Jin Jeon3Convergence Technology Research Team, Daewoo Institute of Construction TechnologyDepartment of Structural Engineering Research, Korea Institute of Civil Engineering and Building TechnologyDepartment of Structural Engineering Research, Korea Institute of Civil Engineering and Building TechnologyDepartment of Civil Systems Engineering, Ajou UniversityAbstract The proper estimation of prestressing force (PF) distribution is critical to ensure the safety and serviceability of prestressed concrete (PSC) structures. Although the PF distribution can be theoretically calculated based on certain predictive equations, the resulting accuracy of the theoretical PF needs to be further validated by comparison with reliable test data. Therefore, a Smart Strand with fiber optic sensors embedded in a core wire was developed and applied to a full-scale specimen and two long-span PSC girder bridges in this study. The variation in PF distribution during tensioning and anchoring was measured using the Smart Strand and was analyzed by comparison with the theoretical distribution calculated using the predictive equations for short-term prestress losses. In particular, the provisions for anchorage seating loss and elastic shortening loss were reviewed and possible improvements were proposed. A new method to estimate the amount of anchorage slip based on real PF distributions revealed that the general assumption of 3–6-mm slip falls within a reasonable range. Finally, the sensitivity of the PF distribution to a few of the variables included in the equation of the elastic shortening loss was examined. The study results confirmed that the developed Smart Strand can be used to improve the design parameters or equations in PSC structures by overcoming the drawbacks of conventional sensing technologies.https://doi.org/10.1186/s40069-021-00488-3prestressed concreteprestressing tendonstrandprestressing forceprestress lossfiber optic sensor |
| spellingShingle | Sang-Hyun Kim Sung Yong Park Sung Tae Kim Se-Jin Jeon Analysis of Short-Term Prestress Losses in Post-tensioned Structures Using Smart Strands International Journal of Concrete Structures and Materials prestressed concrete prestressing tendon strand prestressing force prestress loss fiber optic sensor |
| title | Analysis of Short-Term Prestress Losses in Post-tensioned Structures Using Smart Strands |
| title_full | Analysis of Short-Term Prestress Losses in Post-tensioned Structures Using Smart Strands |
| title_fullStr | Analysis of Short-Term Prestress Losses in Post-tensioned Structures Using Smart Strands |
| title_full_unstemmed | Analysis of Short-Term Prestress Losses in Post-tensioned Structures Using Smart Strands |
| title_short | Analysis of Short-Term Prestress Losses in Post-tensioned Structures Using Smart Strands |
| title_sort | analysis of short term prestress losses in post tensioned structures using smart strands |
| topic | prestressed concrete prestressing tendon strand prestressing force prestress loss fiber optic sensor |
| url | https://doi.org/10.1186/s40069-021-00488-3 |
| work_keys_str_mv | AT sanghyunkim analysisofshorttermprestresslossesinposttensionedstructuresusingsmartstrands AT sungyongpark analysisofshorttermprestresslossesinposttensionedstructuresusingsmartstrands AT sungtaekim analysisofshorttermprestresslossesinposttensionedstructuresusingsmartstrands AT sejinjeon analysisofshorttermprestresslossesinposttensionedstructuresusingsmartstrands |