Estimation of Extreme Wind Speeds.
Estimation of Extreme Wind Speeds.
(799 K)
Simiu, E.
Indian Society for Wind Engineering. Sponsored by
University of Roorkee, New Delhi. International
Association for Wind Engineering. State of the Art in
Wind Engineering. Volume 1. Proceedings. International
Conference on Wind Engineering, 9th. Davenport Sixtieth
Birth Anniversary Volume. January 9-13, 1995, New
Delhi, India, Wiley Eastern Limited, New Delhi, India,
109-123 pp, 1995.
Keywords:
wind velocity; building technology; climatology; extreme
value theory; statistics; wind engineering; wind loads
Abstract:
Extreme wind loads used in design include nominal design
wind loads (e.g., the 50-yr wind load) and ultimate wind
loads. This paper briefly reviews the relationship
between extreme wind loads and extreme wind speeds,
assessments of epochal versus 'peak-over-threshold'
approaches for estimating extreme non-tornadic winds in
areas not subjected to tropical storms, and methods for
estimating extremes from short records. Also reviewed
are wind direction effects, and the estimation of
extreme winds due to tropical cyclones (hurricanes) and
tornadoes. We point out uncertainties due to model
shortcomings and insufficient data, safety concerns due
to current inconsistent uses of reliability concepts,
and the implications of these concerns for code writing.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899