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Wind and Structures
  Volume 4, Number 2, April 2001 , pages 131-146

Full-scale study of conical vortices and roof corner pressures
F. Wu, P.P. Sarkar and K.C. Mehta(U.S.A.)rn

    A full-scale synchronized data acquisition system was set up on the roof of the experimentalrnbuilding at the Texas Tech University Wind Engineering Research Field Laboratory to simultaneouslyrncollect approaching wind data, conical vortex images, and roof corner suction pressure data. One-secondrnconditional sampling technique has been applied in the data analysis, which makes it possible to separatelyrnevaluate the influencing effects of the horizontal wind angle of attack, q, and the vertical wind angle ofrnattack, j. Results show a clear cause-and-effect relationship between the incident wind, conical vortices,rnand the induced roof-corner high-suction pressures. The horizontal wind angle of attack, q, is shown tornbe the most significant factor in influencing the overall vortex structure and the suction pressures beneath.rnIt is further revealed that the vertical wind angle of attack, j, plays a critical role in generating therninstantaneous peak suction pressures near the roof corner.
Key Words
    conical vortices; full-scale; low-rise building; roof corner; pressure; suction.
F. Wu, P. P. Sarkar and K. C. Mehta, Wind Engineering Research Center, Department of Civil Engineering, Texas Tech University, Lubbock, Texas, 79409-1023, U.S.A.

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