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Re: Sloshing Damping
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: Sloshing Damping
- From: "Syed A Masroor" <masroor(--nospam--at)eaworld.com>
- Date: Wed, 22 Nov 2006 12:33:03 +0500
There is nothing secretive about this. The formulae
and graphs are documented in API codes. The forces are much reduced for large
----- Original Message -----
Sent: Wednesday, November 22, 2006 4:29
Subject: RE: Sloshing Damping
I did several tank seismic calculations in the past using some
complicated formulas developed by the petroleum industry to take sloshing into
account. In most cases it reduced the overall lateral force, but in some
increased it from that of the 5% damped levels. I don't know if any of
these formulas are available for use beyond the petroleum industry
however. They were kind of secretive about
It doesn't reduce your seismic shear. Normally
acceleration response spectra is based on 5% damping for buildings.
For sloshing water, the damping is reduced to 0.5%, which in turn
increases the spectral response. The response at 0.5% damping is
1.50 times that at 5% damping.
CH2M HILL /
ASCE 7 allows for 0.5% damping
for sloshing of material in a storage tank. How do I use this number
to reduce the seismic shear?
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