Need a book? Engineering books recommendations...

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

Re: LRFD HSS flexure analysis question

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Reference Table B5.1 of the LRFD Specification (1999):

All walls of a rectangular HSS section are "Stiffened Elements".

If you have bending in both directions, all walls at some time will be
subject to the requirements of "flanges of rectangular box and hollow
structural sections ... for uniform compression".  In addition, all walls
at some time will be subject to the requirements of "webs in flexural
compression"

If you have bending in just

Rick Drake, SE
Fluor, Aliso Viejo, CA

*********



                                                                                                                                       
                      "Eric Green"                                                                                                     
                      <EGreen@walterpmoor      To: <seaint(--nospam--at)seaint.org>                                                                 
                      e.com>                                                                                                           
                      01/22/03 09:07 AM        cc:                                                                                     
                      Please respond to                                                                                                
                      seaint                   Subject:  LRFD HSS flexure analysis question                                            
                                                                                                                                       
                                                                                                                                 ..... 
                                                                                                                                       




When designing a HSS for flexure, the wall slenderness ratio is defined as
h/t. My question, is h/t defined relative to the axis of bending, or is is
defiend as the larger of h/t or b/t?

For example, assume a HSS12x8x3/8 is being bent about the strong axis, in
which case h/t = 31.4 (and b/h = 19.9). However, of the same member is bent
about the weak axis, h/t = 19.9 (and b/h = 31.4).  Should 31.4 be used for
both analysis, or 31.4 for the strong axis and 19.9 for the weak?

It seems to me h/t is relative to the axis of bending and different number
should be used for weak and strong axis bending.

Eric Green
- Speaking only for myself, and nobody else.






-----------------------------------------------------------------------------------------------------
The information transmitted is intended only for the person
or entity to which it is addressed and may contain confidential
and/or privileged material. If you are not the intended recipient 
of this message you are hereby notified that any use, review,
retransmission, dissemination, distribution, reproduction or any
action taken in reliance upon this message is prohibited. If you 
received this in error, please contact the sender and delete the 
material from any computer.  Any views expressed in this message
are those of the individual sender and may not necessarily reflect 
the views of the company.  
-------------------------------------------------------------------------------------------------------


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