The improvement of the dynamic behavior of railway bridge transition zone using furnace slag reinforcement: A numerical and experimental study
| Autor: | Guoqing Jing, Haoyu Wang, Morteza Esmaeili, Mohammad Siahkouhi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Mechanical Engineering 0211 other engineering and technologies Mixing (process engineering) Slag Stiffness 02 engineering and technology Structural engineering Track (rail transport) Bridge (interpersonal) Finite element method visual_art 021105 building & construction visual_art.visual_art_medium medicine Direct shear test medicine.symptom business Reinforcement 021101 geological & geomatics engineering |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 236:362-374 |
| ISSN: | 2041-3017 0954-4097 |
| DOI: | 10.1177/09544097211020603 |
| Popis: | Transition zones between railway tracks and bridge decks can cause higher dynamic impacts. A solution is smoothly changing the track stiffness by gradually mixing steel furnace slag into the stone ballast. A nominated bridge transition zone is divided into 5 blocks of 7 meters long, with the mixing percentages of 0%, 25%, 50%, 75% and 100%. The mechanical behaviors of furnace slag-ballast combinations (FS-BCs) were studied using experiments of shear strength test, Los Angles abrasion index and plate load test. Furthermore, the dynamic behavior of bridge transition zone with FS-BCs blocks was investigated using a field validated FEM model. Results show that the 100%, 75%, 50% and 25% furnace slag by weight of ballast can increase the shear strength and ballast layer bending modulus by 13%, 12%, 9% and 7% at speed of 300 km/h compared with those of the stone ballast. The FEM study shows that rail deflections are reduced about 20%, 14%, 21% and 16% at speed of 300 km/h corresponding to 100%, 75%, 50% and 25% FS-BCs and accelerations are significantly reduced as well as increasing FS content of each block in bridge transition zone so that a smooth bridge transition zone can be achieved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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