A Numerical Study on Structural Performance of Railway Sleepers Using Ultra High-Performance Concrete (UHPC)
This numerical study investigates the structural performance of railway sleepers made of ultra high-performance concrete (UHPC). First, numerical concrete sleepers are developed, and the tensile stress-strain relationship obtained from the direct tension test on the UHPC coupons is used for the tens...
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MDPI AG
2021-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/11/2979 |
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| author | Moochul Shin Younghoon Bae Sukhoon Pyo |
| author_facet | Moochul Shin Younghoon Bae Sukhoon Pyo |
| author_sort | Moochul Shin |
| collection | DOAJ |
| description | This numerical study investigates the structural performance of railway sleepers made of ultra high-performance concrete (UHPC). First, numerical concrete sleepers are developed, and the tensile stress-strain relationship obtained from the direct tension test on the UHPC coupons is used for the tensile constitutive model after applying a fiber orientation reduction factor. The numerical sleeper models are validated with the experimental data in terms of the force and crack-width relationship. Second, using the developed models, a parametric study is performed to investigate the performance of the UHPC sleepers while considering various design/mechanical/geometrical parameters: steel fiber contents, size of the cross-section, and diameter and strength of prestressing (PS) tendons. The simulation results indicate that the size of the cross-section has the most impacts on the performance, while the effect of yielding strengths of PS tendons is minimal among all the parameters. Engineers need to pay attention to efficiency and an economical factor when using a larger cross-section, since sleepers with larger cross-sections can be an over-designed sleeper. This study suggests an economical design factor for engineers to evaluate what combination of parameters would be economical designs. |
| first_indexed | 2024-03-10T10:51:07Z |
| format | Article |
| id | doaj.art-d06a1411739441de831537b3883cd19a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T10:51:07Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-d06a1411739441de831537b3883cd19a2023-11-21T22:14:32ZengMDPI AGMaterials1996-19442021-05-011411297910.3390/ma14112979A Numerical Study on Structural Performance of Railway Sleepers Using Ultra High-Performance Concrete (UHPC)Moochul Shin0Younghoon Bae1Sukhoon Pyo2Department of Civil and Environmental Engineering, Western New England University, Springfield, MA 01119, USAKorea Railroad Research Institute, 176 Chuldobangmulgwan-ro, Uiwang-si 16105, KoreaDepartment of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, KoreaThis numerical study investigates the structural performance of railway sleepers made of ultra high-performance concrete (UHPC). First, numerical concrete sleepers are developed, and the tensile stress-strain relationship obtained from the direct tension test on the UHPC coupons is used for the tensile constitutive model after applying a fiber orientation reduction factor. The numerical sleeper models are validated with the experimental data in terms of the force and crack-width relationship. Second, using the developed models, a parametric study is performed to investigate the performance of the UHPC sleepers while considering various design/mechanical/geometrical parameters: steel fiber contents, size of the cross-section, and diameter and strength of prestressing (PS) tendons. The simulation results indicate that the size of the cross-section has the most impacts on the performance, while the effect of yielding strengths of PS tendons is minimal among all the parameters. Engineers need to pay attention to efficiency and an economical factor when using a larger cross-section, since sleepers with larger cross-sections can be an over-designed sleeper. This study suggests an economical design factor for engineers to evaluate what combination of parameters would be economical designs.https://www.mdpi.com/1996-1944/14/11/2979ultra high-performance concrete (UHPC)railway sleeperstatic bending testnumerical simulationstructural performance |
| spellingShingle | Moochul Shin Younghoon Bae Sukhoon Pyo A Numerical Study on Structural Performance of Railway Sleepers Using Ultra High-Performance Concrete (UHPC) Materials ultra high-performance concrete (UHPC) railway sleeper static bending test numerical simulation structural performance |
| title | A Numerical Study on Structural Performance of Railway Sleepers Using Ultra High-Performance Concrete (UHPC) |
| title_full | A Numerical Study on Structural Performance of Railway Sleepers Using Ultra High-Performance Concrete (UHPC) |
| title_fullStr | A Numerical Study on Structural Performance of Railway Sleepers Using Ultra High-Performance Concrete (UHPC) |
| title_full_unstemmed | A Numerical Study on Structural Performance of Railway Sleepers Using Ultra High-Performance Concrete (UHPC) |
| title_short | A Numerical Study on Structural Performance of Railway Sleepers Using Ultra High-Performance Concrete (UHPC) |
| title_sort | numerical study on structural performance of railway sleepers using ultra high performance concrete uhpc |
| topic | ultra high-performance concrete (UHPC) railway sleeper static bending test numerical simulation structural performance |
| url | https://www.mdpi.com/1996-1944/14/11/2979 |
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