Need a book? Engineering books recommendations...
RE: Seismic Loading on basement walls[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Seismic Loading on basement walls
- From: Harold Sprague <spraguehope(--nospam--at)hotmail.com>
- Date: Tue, 28 Sep 2010 17:08:40 +0000
Currently there are no building code requirements regarding seismic soil forces on walls. That does not mean it does not exist. There is commentary contained in NEHRP Resource Paper #12 found at:|
This has been a topic kicked around at the BSSC for quite some time. We can't agree to a building code requirement. But just because we can't resolve this into a building code does not mean that there is good data to characterize the problem.
Regards, Harold Sprague
Subject: RE: Seismic Loading on basement walls
Date: Tue, 21 Sep 2010 06:09:57 -0700
Current code with seismic climatic data implies that seismic must be addressed for all “engineered” structures and elements, however, as far as I am aware Part 9 does not yet have that requirement. That said, a 9’ wall becomes an engineered component and seismic must now be addressed. Seems to me that it won’t be a significant issue in your jurisdiction. Care must be taken in which EQ model to use. For certain walls, Monookabe is very conservative and should be used with discretion. OTOH there is discussion at present here in BC on the loads being developed on parkade walls by the 2006 code requirements and there is, as yet, no agreed resolution …
I’ll check and see if there is any progres with the committee working on it.
Thor A. Tandy P.Eng, C.Eng, Struct.Eng, MIStructE, MSCSE
From: Gary L. Hodgson and Assoc. [mailto:design(--nospam--at)hodgsoneng.ca]
From my previous post I will say that all the licensing issues appear to have been worked out.
The steel stack that I am working on is not tall being less than 50 ft. There are some breech openings in the stack near the base. The openings are round and will be “stiffened” due to horizontal pipes the same diameter of the opening that will be welded to that location. I have to go to my “archives” located in my not so clean garage to locate a reference that I only think is there. I had to reduce the archived library some time back. Anyway, it has been quite some time since I have done a stack design and I am looking for a reference/example of reinforcing breech openings. I have some pages from ASME with some stack design requirements, but it doesn’t (at least the portion that I have) say a lot about the breech reinforcement.
I will say that in doing some very quick ballpark calcs, I’m not sure the reinforcement is all that critical in my case. If I take the portion of the stack between the breech openings (without stiffeners) and check compression stresses from gravity and wind. The stresses appear to be o.k. that would even be with assuming the width of the compression element does not increase due to the circular nature of the opening and being unstiffened. Anyway, if anyone has some a reference, example or help in general, I would certainly appreciate it.
Joseph R. Grill, PE
Verde Valley Engineering, PLLC
******* ****** ******* ******** ******* ******* ******* *** * Read list FAQ at: http://www.seaint.org/list_FAQ.asp * * This email was sent to you via Structural Engineers * Association of Southern California (SEAOSC) server. To * subscribe (no fee) or UnSubscribe, please go to: * * http://www.seaint.org/sealist1.asp * * Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you * send to the list is public domain and may be re-posted * without your permission. Make sure you visit our web * site at: http://www.seaint.org ******* ****** ****** ****** ******* ****** ****** ********
- Re: Seismic Loading on basement walls
- From: Gary L. Hodgson and Assoc.
- Re: Seismic Loading on basement walls
- Prev by Subject: RE: Seismic Loading on basement walls
- Next by Subject: Re: Seismic Loading on basement walls
- Previous by thread: RE: Seismic Loading on basement walls
- Next by thread: Re: Seismic Loading on basement walls