Database-Assisted Design and Wind Directionality Effects.
Database-Assisted Design and Wind Directionality
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.
wind effects; databases; wind direction; steel
structures; methodology; building design
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.