- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
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| Citation: | ZHU Jin, HUANG Xu, XIONG Ziluo, LI Yongle. Study on Driver’s Sight Line Under Vertical Vortex-Induced Vibration of Long Span Suspension Bridges[J]. Journal of Southwest Jiaotong University, 2023, 58(1): 191-201. doi: 10.3969/j.issn.0258-2724.20210260
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In order to study the driver’s sight line under vertical vortex-induced vibration (VVIV) of long span suspension bridges, a numerical framework of coupled wind-vehicle-bridge system considering VVIV (termed as WVB-VIWW) is proposed by introducing a vortex aerodynamic model into the traditional coupled WVB theory. Based on the proposed framework and with the aid of geometric construction method, the equation of driver’s blind region under VIVV is derived based on a vortex vibration mode with three half-sine-waves. Subsequently, the proposed WVB-VIVV framework and equation of driver’s blind region are applied to a long span suspension bridge which has experienced VVIV. The influence of several key factors, i.e., vehicle type, vehicle speed, and the time instant where vehicle enters the bridge, on the maximum height of driver’s blind region, the total time duration of the driver’s blind region, and the ratio of driver’s blind region is investigated. The results indicate that the maximum height of the driver’s blind region varies periodically, and the period is approximately equal to the time required by the vehicle to travel through a half-sine-wave. The vehicle speed has an insignificant effect on the maximum height of driver’s blind region. Because the driver’s sight line height varies with the vehicle type, the lower the driver’s sight line height, the higher the maximum height of the driver’s blind region. Additionally, the vehicle weight could increase the maximum height of the driver’s blind region by increasing the overall deflection of the bridge span. It is also found that the total time duration of driver’s blind region is insensitive to the time instant where vehicle enters the bridge, but the total time duration of driver’s blind region decreases with the increase of the vehicle speed. Furthermore, the time instant where the vehicle enters or the vehicle speed has barely no effect on the ratio of driver’s blind region. However, the vehicle type has remarkable influence on the ratio of driver’s blind region, e.g., the ratio of driver’s blind region for sedan car and megabus is approximately 21% and 12%, respectively.
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Figures(15) / Tables(2)
ZHU Jin, HUANG Xu, XIONG Ziluo, LI Yongle. Study on Driver’s Sight Line Under Vertical Vortex-Induced Vibration of Long Span Suspension Bridges[J]. Journal of Southwest Jiaotong University, 2023, 58(1): 191-201. doi: 10.3969/j.issn.0258-2724.20210260
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