Need a book? Engineering books recommendations...

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

Delta sub m

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Hi 
Just want to find out how some of you view the displacement value
associated with special seismic load condition outlined in  the seismic
provisions equation 4-1,
1.2D + 0.5 L +omega E for OMRF, two story, R=4.5.  do you consider the
resulting deflection equivalent to delta sub M. i.e.( inelastic)???
My first reaction was to view detla s associated with with equation 12-10,
).9D +E/1.4 or .9 D -E/1.4. as elastic delta s. with corrosponding deltaM =
0.7xRxDelta sub s.  In fact the maginfication factor seems to indicate
inelastic behavior. I am concerned about the vlaue of delta sub M as
compared to allowable drift values.
Your insight is appreciated.
Samir Ghosn, P.E.
Harris & Associates
(1800) 827-4901xt 360



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