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Wind and Structures
  Volume 17, Number 2, August 2013, pages 163-184
DOI: http://dx.doi.org/10.12989/was.2013.17.2.163
 


Experimental and numerical studies of aerodynamic forces on vehicles and bridges
Yan Han, Jiexuan Hu, C.S. Cai, Zhengqing Chen and Chunguang Li

 
Abstract
    An accurate identification of the aerodynamic characteristics of vehicles and the bridge is the premise for the coupled vibration analysis of a wind-vehicle-bridge system. At present, the interaction of aerodynamic forces between the road vehicles and bridge is ignored in most previous studies. In the present study, an experimental setup was developed to measure the aerodynamic characteristics of vehicles and the bridge for different cases in a wind tunnel considering the aerodynamic interference. The influence of the wind turbulence, the wind speed, the vehicle interference, and the vehicle position on the aerodynamic coefficients of vehicles, and the influence of vehicles on the static coefficients of the bridge were investigated, based on the experimental results. The variations in the aerodynamic characteristics of vehicles and the bridge were studied and the measured results were validated according to the results of surface pressure measurements on the vehicle and the bridge. The measured results were further validated by comparing the measured results with values derived numerically. The measured results showed that the wind turbulence, the vehicle interference, and the vehicle position significantly affected the aerodynamic coefficients of vehicles. However, the influence of the wind speed on the aerodynamic coefficients of the studied vehicle is small. The static coefficients of the bridge were also significantly influenced by the presence of vehicles.
 
Key Words
    wind-vehicle-bridge system; cross winds; aerodynamic characteristics; aerodynamic interference; wind- tunnel tests; numerical simulation
 
Address
Yan Han, Jiexuan Hu, C.S. Caiand Chunguang Li : School of Civil Engineering and Architecture, Changsha University of Science & Technology,Changsha, Hunan, China, 410004
C.S. Cai: Department of Civil and Environmental Engineering, Louisiana State University,Baton Rouge, USA, LA 70803
Zhengqing Chen : Wind Engineering Research Center, College of Civil Engineering, Hunan University, Changsha, Hunan, China, 410082
 

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