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Re: Direction of Seismic Loading
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- Subject: Re: Direction of Seismic Loading
- From: Neil Moore <nma(--nospam--at)nma-se.com>
- Date: Mon, 14 Feb 2011 16:04:39 -0800
Yes. Section 12.5.4 is for buildings. You should probably be in
Chapter 15 and looking at Table 15.4-2 where they give some guidance
for distribution. I would take 100% of the seismic at what is the
worst direction (depending upon how the anchor bolts or leg supports
are laid out). You might have to do a couple of trials depending on
how you are supporting the vertical tank unless it is symmetrical and
the C.G. is at the center of the tank in plan. Neil Moore, S.E. On 2/14/2011 3:30 PM, Tom.Hunt(--nospam--at)fluor.com wrote: Section 12.5 of ASCE 7-05 provides the requirements for the direction of application of seismic forces and for a typical rectangular building in California (SDC "D") I suspect most engineers would use 100% in one direction and 30% in the other to satisfy ASCE 7 Section 12.5.4. My understanding is that this is to capture the effects of the earthquake forces at some direction other than the principal axis where the loading would impart some level of forces in both orthogonal force resisting systems at the same time. |
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- Direction of Seismic Loading
- From: Tom . Hunt
- Direction of Seismic Loading
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