Need a book? Engineering books recommendations...

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

Re: Collector Design with 5% ECC & omega

[Subject Prev][Subject Next][Thread Prev][Thread Next]

Just wondering, if you have to derive the forces with the eccentricity on either side of the center of gravity, is it possible for the force in a collector to be less than when the eccentricity is ignored? I usually think about collectors being in flexible diaphragms anyway.

 

Will Haynes

 

>From: "Paul Feather" <pfeather(--nospam--at)SE-Solutions.net>

>Reply-To: <seaint(--nospam--at)seaint.org>
>To: <seaint(--nospam--at)seaint.org>
>Subject: Re: Collector Design with 5% ECC & omega
>Date: Thu, 24 Mar 2005 14:08:24 -0800
>
>MessageHow do you determine the collector force without accounting for the 5% eccentricity?  1612.4 requires Omega E.  E is calculated with and without the eccentricity.  Whichever is the governing force is the one you use.
>
>
>   ----- Original Message -----
>   From: Alex
>   To: seaint(--nospam--at)seaint.org
>   Sent: Thursday, March 24, 2005 12:10 PM
>   Subject: RE: Collector Design with 5% ECC & omega
>
>
>   David,
>
>   "Collector elements, splices, and their connections to resisting elements shall have the design strength to resist the combined loads resulting from the special seismic load of section 1612.4"(UBC1633.2.6)
>   Do you think for collector themselves we should also include both 5%ECC  and omega factor?
>
>
>
>   Alex,PE
>
>
>
>
>   -----Original Message-----
>   From: David Topete [mailto:davetopete(--nospam--at)yahoo.com]
>   Sent: Thursday, March 24, 2005 10:02 AM
>   To: seaint(--nospam--at)seaint.org
>   Subject: Re: Collector Design with 5% ECC & omega
>
>
>   Collectors themselves, include 5%eccen.  Connections
>   of collectors to LFR elements, include the 5% eccen
>   AND Omega factor.  The 5% accidental is only if you
>   have a rigid diaphragm.
>   I'm sure someone will correct me if I'm wrong....  :-P
>   David Topete, SE
>   SF, CA
>   --- Alex <seaosd(--nospam--at)hotmail.com> wrote:
>   > do we have to include 5% ecc with omega factor for
>   > collector
>   > design?(UBC1633.2.6)
>   >
>   >
>   >
>
>
>
>   __________________________________
>   Do you Yahoo!?
>   Yahoo! Mail - Easier than ever with enhanced search. Learn more.
>   http://info.mail.yahoo.com/mail_250
>
>   ******* ****** ******* ******** ******* ******* ******* ***
>   *   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
>   ******* ****** ****** ****** ******* ****** ****** ********
>


Try the new Beta version of MSN Messenger - it's FREE! ******* ****** ******* ******** ******* ******* ******* *** * 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 ******* ****** ****** ****** ******* ****** ****** ********