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Database-Assisted Design and Wind Directionality Effects.


pdf icon Database-Assisted Design and Wind Directionality Effects. (503 K)
Rigato, A.; Chang, P. C.; Simiu, E.

Bluff Body Aerodynamics and Applications, 4th International Colloquium. Volume of Abstracts. Proceedings. Organized by Ruhr-University Bochum. September 11-14, 2000, 213-216 pp, 2000.

Keywords:

wind effects; databases; wind direction; steel structures; methodology; building design

Abstract:

We present a simple methodology, developed for use in design assisted by electronic aerodynamic and climatological databases (for short, database-assisted design), that allows a realistic assessment of wind directionality effects. We apply the methodology to typical low-rise industrial steel frame buildings with a rectangular shape in plan, located in hurricane-prone areas. We compare our results with results obtained by the procedure specified in the ASCE 7-98 Standard, which consists, for buildings, of applying a blanket directionality reduction factor Kd=0.85 to wind effects obtained by disregarding directionally. The results show that in hurricane-prone areas, for significant numbers of buildings, the use of the ASCE procedure can result in the underestimation of wind effects corresponding to strength design, and that database-assisted design for wind offers the potential for significantly more risk-consistent, safe, and economical design of buildings with both known and unknown orientation.