Need a book? Engineering books recommendations...

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

RE: Cranes: Curved Track Monorail

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Michel,
 
If there is something special in the 1943 paper, I missed it.  Otherwise the materail in the paper is available in standard literature such as the book by Salmon & Johnson. In fact, there is a, more rtecent, ASCE publication specifically devoted to torsion of open sections.
 
Rajendran

Michel Blangy <mblangy(--nospam--at)satco-inc.com> wrote:
I found a nice paper on the subject with some worked examples and
experimental results comparison:

http://naca.larc.nasa.gov/reports/1943/naca-tn-888/index.cgi?thumbnail1#star
t

I wish I had seen this while doing my thesis. I studied and modeled
thin-walled, open-section beams curved in plan, loaded perpendicular to the
plane of curvature (or something like that)..anyway I used Abaqus and
SAP2000 to model. Abaqus has a 3-noded curved beam element that includes
the warping torsion degree of freedom. In SAP I modeled my beam section as
an assemblage of plate elements and varied the geometries to create the
curve - (extremely tedious work). For what it is/was worth I achieved
agreement between the two models within 10%. The SAP model erred on the
un-conservative side.

Michel Blangy


-----Original Message-----
From: David Maynard [mailto:davemaynard(--nospam--at)ceincorp.com]
Sent: Wednesday, January 05, 2005 10:45 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Cranes: Curved Track Monorail


Again, to revisit this issue, I was looking at the torsional analysis needed
for this monorail, and the end conditions got me slightly perplexed. Let me
refresh your memory on the situation. The hoist is an underhung monorail
hoist with a support structure located above the monorail. The monorail
(likely S section) will be hung using bolts through the top flange of the
monorail to the bottom flange of the support structure (likely WF sections).

Torsion of the monorail is an obvious consideration, especially with a hoist
capacity of 10 Tons. Now, with the above hanging connection as described,
what would be the description of the "Physical Condition" and the "Torsional
End Condition" for analysis???

Thanks for the information. I really appreciate it.

Dave Maynard, PE
Gillette, Wyoming
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.296 / Virus Database: 265.6.7 - Release Date: 12/30/2004


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


Do you Yahoo!?
Take Yahoo! Mail with you! Get it on your mobile phone.