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Database-Assisted Design, Standardization, and Wind Direction Effects.


pdf icon Database-Assisted Design, Standardization, and Wind Direction Effects. (104 K)
Rigato, A.; Chang, P.; Simiu, E.

Journal of Structural Engineering, Vol. 127, No. 8, 853-860, August 2001.

Keywords:

wind direction; wind effects; databases; standardization; extreme values; meteorology; structural engineering

Abstract:

The writers 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. The methodology is applied to typical low-rise industrial steel frame buildings with a rectangular shape in plan, located in hurricane-prone areas, and results are compared with results obtained by the procedure specified in the ASCE 7-98 Standard, which, for buildings, consists of applying a blanket directionality reduction factor Kd = 0.85 to wind effects obtained by disregarding directionality. The results show that, for significant numbers of buildings in hurricane-prone areas, the use of the ASCE procedure can result in the underestimation of wind effects corresponding to strength design. They also show that database-assisted design for wind loads offers the potential for significantly more risk-consistent, safer, and economical design for buildings with both known and unknown orientation.