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UBC 97 Drift[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: UBC 97 Drift
- From: Sleiman Serhal <mony(--nospam--at)destination.com.lb>
- Date: Fri, 26 Mar 1999 10:51:52 +0200
When computing Ds for a
shear wall according to the UBC 97, do u use in your mathematical model
an I of 0.35Ig if the wall cracks under elastic forces - due to E only
It seems to me that this would be too penalizing especially that we multiply Ds by the R factor to get Dm which is the value actually used to determine if the allowable drift has been exceeded.
Some engineers tell me they use an I = 1Ig !
And is the 1.2D + f1L + E including P-D
the only combination to use for drift calculations ?
Thanks in advance,
- From: John O'Brien
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