Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Old Seismic Values

[Subject Prev][Subject Next][Thread Prev][Thread Next]
If I remember correctly, Jason is having to deal
with the military--Kind of like trying to push a
1 ton boulder up a hill with a straw.
Gary (ex-RCAF)


On 12 Aug 2004 at 13:17, Daryl Richardson wrote:

> Jason, Harold,
> 
>         This sounds more like a political problem then a technical
>         problem to
> me.  I don't know very much about the different technologies involved
> here; but I do know that political problems often respond better to
> political solutions than to technical solutions.
> 
>         Might you not save a lot of time and effort by getting a
>         letter from the
> Building Authority Having Jurisdiction stating what will and what will
> not be accepted for the project?  Most businessmen won't get their
> backs up and fight this kind of directive.
> 
>         Another possible solution is to provide two sets of
>         calculations which
> show that both codes are met.
> 
> Respectfully submitted,
> 
> H. Daryl Richardson
> 
> Harold Sprague wrote:
> 
> > Jason,
> >
> > You have got a bit of homework to do.  This is normally in the
> > domain of seismologists.  But if you have the marching orders, the
> > following is your homework: * 1994 NEHRP and Commentary * 1997 NEHRP
> > and Commentary * 2000 NEHRP and Commentary * 2003 NEHRP and
> > Commentary * Neotectonics in Earthquake Evaluation, Krinitzsky and
> > Slemmons, Geological Society of America * DOE STD 1020-94, Natural
> > Phenomena Hazards Design and Evaluation Criteria for DOE Facilities
> >
> > Papers:
> > * The Hazard in Using Probabilistic Seismic Hazard Analysis for
> > Engineering, Krinitzsky, Environmental & Engineering Geoscience
> > Winter 1998 * USACE Paper S-73-1, State of the Art for Assessing
> > Earthquake Hazards in the US, Report 29, Krinitzsky
> >
> > The NEHRP documents were developed by the BSSC
> > http://www.bssconline.org/. Some of their documents are available on
> > line.  Some of the older ones will probably not be available on
> > line.
> >
> > If it were up to me, I would call Geomatrix, URS, USACE, or USGS in
> > Boulder.
> >   You will find guys like Maury Power, C B Crouse, Ellis Krinitzsky,
> >   E V
> > Leyendecker, Art Frankle, Ted Algermissen, and Dave Perkins who are
> > the real movers in the field.  I have been envoloved in seismic
> > engineering for about 17 years and envolved in code development for
> > about 10 years, I would hire one of the guys.
> >
> > What you are needing was the result of a radical evolution that took
> > place over a 10 year period.  In the early days the Algermissen and
> > Perkins charts were what was used for zone development and were 20
> > years old before we went to true seismic spectral ordinates.  Ted
> > Algermissen first proposed a seismic spectral ordinate chart in
> > about 1995.  It just took us a while.
> >
> > Regards,
> > Harold Sprague
> >
> > >From: "Jason W. Kilgore" <jkilgore(--nospam--at)leok.com>
> > >Reply-To: <seaint(--nospam--at)seaint.org>
> > >To: <seaint(--nospam--at)seaint.org>
> > >Subject: RE: Old Seismic Values
> > >Date: Wed, 11 Aug 2004 18:21:17 -0500
> > >
> > > > I don't know why you are even trying to use the old data.
> > >
> > >Because the client said, in effect, "Thou shalt use this document
> > >in your design".  The document specifically states the acceleration
> > >and velocity values I gave earlier.  I *know* that the values are
> > >wrong; my problem is that I have to explain to the client why
> > >they're wrong, how much they're wrong, what are the right values,
> > >and why they are the right values.
> > >
> > >In order to do this efficiently, I need to completely understand
> > >exactly what the old values are, and how they relate to the new
> > >values.
> > >
> > >Again, I realize that these are very low numbers, but the
> > >difference in the report value (5%, 475 yr. return) and new values
> > >(2.1%, 475 yr. return) could mean the difference between adding
> > >bracing to all mechanical units or strengthening existing 20' tall
> > >URM shear walls (in plane and out-of-plane).
> > >
> > >---
> > >Jason Kilgore
> > >Leigh & O'Kane, LLC
> > >Kansas City, Missouri
> > >
> >
> > _________________________________________________________________
> > Express yourself instantly with MSN Messenger! Download today - it's
> > FREE!
> > http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
> >
> > ******* ****** ******* ******** ******* ******* ******* ***
> > *   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
> > ******* ****** ****** ****** ******* ****** ****** ********
> 
> 
> 
> ******* ****** ******* ******** ******* ******* ******* ***
> *   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 
> ******* ****** ****** ****** ******* ****** ****** ******** 



******* ****** ******* ******** ******* ******* ******* ***
*   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 
******* ****** ****** ****** ******* ****** ****** ********