Effects of Wind Direction on Unsteady Wind Pressure on A Gable Roof Body Under A Short-rise-time Gust

• Takeuchi Takashi

  Kobe University

• Maeda Junji

  Kyushu University

Bibliographic Information

Other Title

• 立ち上がり時間の短い突風下の切妻屋根建物に作用する非定常風圧力に及ぼす風向角の影響に関する研究

Abstract

The effects of wind direction on generation points of unsteady vortices and unsteady wind pressure on a gable roof body under a short-rise-time gust were investigated using a computational fluid dynamics (CFD) simulation with an LES model. The unsteady wind pressure at some points on the body subjected to the gust was compared with the results of wind tunnel tests, and it was confirmed that the overshoot phenomenon of wind pressure occurred in the CFD simulations as well as wind tunnel tests. It was found that an unsteady vortex, which was generated on the surface of the gable body, caused the overshoot phenomenon of wind pressure. The generation points of unsteady vortices changed with wind direction. The overshoot of wind pressure on the roof face and the gable wall face was considerably large in the case of wind directions of 45 degrees and 15 degrees, respectively.

Journal

• PROCEEDINGS OF NATIONAL SYMPOSIUM ON WIND ENGINEERING

  PROCEEDINGS OF NATIONAL SYMPOSIUM ON WIND ENGINEERING 23 (0), 247-, 2014

  Japan Association for Wind Engineering

Keywords

• Short-rise-time gust
• Overshoot of wind pressure
• CFD

Details

• CRID: 1390001205592837120
• NII Article ID: 130005478142
• DOI: 10.14887/kazekosymp.23.0_247
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed