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FW: Dynamic Wind Effects

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Check out the references in "Tubular Steel Structures Theory and Design"
by Troitsky published by Lincoln Welding p 5-51 thru 5-53 and on p 6-47.

ASME STS-1-1992, "Steel Stacks"

TIA/EIA-222-F "Structural Standards for Steel Antenna Towers and Antenna
Supporting Structures"

"Wind Effects on Structures" by Simiu and Scanlan

There are several references in "Designing for Wind Effects - The ESDU
Wind Engineering" Abstracts".

There is also the commentary in the ASCE 7-95.

Take care when using the literature in regard to extreme wind
velocities.  As of 1995 the standard for the U.S. is a "peak gust or 3
second gust" which has been the standard for the National Weather
Service for years.  Prior to 1995 the structural engineering community
used the "fastest mile" wind.  The World Meteorologic Organization
typically uses the "10 minute mean".  Also look at the probabilities.
They are not always the same.  Occasionally they will use 50 years, but
may have different exceedance percentages which will result in different
mean recurrence intervals.  It is not easy to compare apples to apples.

Harold Sprague
Black & Veatch
From: BVeit(--nospam--at)
To: seaoc(--nospam--at)
Subject: Dynamic Wind Effects
Date: Wednesday, August 13, 1997 7:33PM

I'm looking for info on dynamic effects (von karman) on tall slender
structures (120' flag poles, transmission towers, etc.)  Any references?
Thanks, Brian Veit, P.E.