- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | HE Jiajun, XIANG Huoyue, ZHU Jin, ZHANG Botao, LI Yongle. Experimental Study on Shelter Effect of Bridge Tower on Single-Level Rail-Cum-Road Bridge[J]. Journal of Southwest Jiaotong University, 2023, 58(2): 388-397. doi: 10.3969/j.issn.0258-2724.20210286
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The shelter effect of the bridge tower brings a sudden change of aerodynamic load on road vehicles passing by. For a single-level rail-cum-road bridge with larger scale of bridge tower in the longitudinal direction, the variation of the aerodynamic load is more intense. To explore the aerodynamic characteristics of vehicles near the pylon area on a single-level rail-cum-road bridge, a 1/20 scale wind tunnel test model is built. Based on the optimized test system, the aerodynamic loads of road vehicles passing by the bridge tower are measured. The influence of lane location, the vehicle type, and the bridge tower type on the aerodynamic load is discussed. The results reveal that traveling on a closer lane to the tower increases the variation amplitude in side force coefficient and yawing moment coefficient, and the upward lift force is also larger; thus vehicles are prone to sideslip and lateral-deviation. The vehicle length has a significant impact on the aerodynamic characteristics of the vehicles passing by the bridge tower area. Vehicles with smaller length possess larger variations of side force coefficient, while vehicles with larger length possesses larger variations of rolling moment coefficient, yawing moment coefficient and pitching moment coefficient. Compared with the bridge tower with a rectangular section, the bridge tower with chamfer decreases the sudden variation of side force coefficient of a van by 43.7%, and decreases the sudden variation of side force coefficient and yawing moment coefficient of a track-trailer by 25.8% and 29.2%, respectively.
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