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UBC Section 1634
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- Subject: UBC Section 1634
- From: Sassan Parhizgari <shahkarp(--nospam--at)sums.ac.ir>
- Date: Fri, 11 Sep 1998 21:28:00 +0430
I'm using the UBC 97 code for the first time and since it's been completely revised since the last edition I still have some problems with it. I would appreciate input that would help me understand some of the parts. In section 1634 (Loads on non building structures) article 1634.1.2 states that "... reductions in these forces using the coefficient R is permitted where the design of non building structures provides sufficient strength and ductility....". Does this mean that I could divide the minimum base shears obtained by equations 34-1 or 34-2 by the proper R value? I'm designing a foundation for a skirt supported vertical vessel with a height of 86m and a diameter of 5.87m containing hydrocarbons. The rest of the parameters are as follows: T=1.87s Z=0.2 (Zone 2) R=2.9 Cv=0.4 Ca=0.28 (Soil profile SD) I=1.25 Eq. 30-4 would give V= .09W According to Eq. 34-2 V=0.2W But if my impression of article 1634.1.2 is correct I could reduce the minimum value to .2W/2.9=.07W using the R factor. I'd appreciate any comments on this matter. Thanks S Parhizgari
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