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 -----Original Message-----
From: Joyce Fuss
Sent: Tuesday, June 01, 1999 9:42 AM
To: 'seaint listserve'
Subject: RE: Dynamic Loading

Bill, I couldn't agree more.  IMO, SEAOC would be well-advised to sponsor   
a series of statewide seminars on these topics, which are still not   
well-enough understood.  Education of practicing structural engineers   
will go a long way to encouraging participation in code-developing   
processes and improving structural performance, thus achieving one of the   
"Big Picture" goals of reducing financial impacts (i.e. structural and   
nonstructural damage) due to one type of natural disaster-dynamic   
loading.  Since I'm writing to a list perused by engineers, this is not   
to belittle life safety, nor learning through experience by observing   
actual building performance during earthquakes.  I for one would   
appreciate any opportunity to further my understanding of the principles   
behind sound engineering design and practical methods that go beyond the   

As for the rigid vs. flexible wood diaphragm issue, I agree with John   
Shipp in that structural behavior is a result of the integral stiffnesses   
of all elements; those engineers involved in code development seek to   
represent actual behavior with approximations, and the practicing   
engineering community is obviously not yet satisfied with the procedures.
 Codes are not written in a day-it's a dynamic process, albeit   
frustratingly slow at times-, but I have seen many developments for the   
better evolve over the 17 years during which I have been practicing   
engineering.  I appreciate the opportunity to read the posts on this   
list, and am amazed that more engineers of all people do not have access   
or participate.  It's one of many media for the furthering of structural   
engineering that we should make use of, not to mention the intellectual   
value and even entertainment (yes!).

Joyce Fuss, SE
Lionakis Beaumont Design Group
Sacramento, CA 95814

 -----Original Message-----
From: Bill Polhemus
Sent: Tuesday, June 01, 1999 6:59 AM
To: Joyce; 'seaint(--nospam--at)'
Subject: RE: Dynamic Loading

To me, the typical structural engineer should take a course in   
Vibrations," to start off, and then a course in "Applied Structural
Dynamics" which would take a little time to go over basic theory, and   
jump into practical applications of the theory to common problems.

They ought to learn how to use a response spectrum, also time-history
analyses of impulse loads, wind-induced harmonic effects, etc.

These are all things that would have benefitted me at one time or another
during my seventeen year career.