Discussion Groups

Robot Structural Analysis

Reply
Member
Posts: 5
Registered: ‎04-10-2012

L-shaped cross section imperfections EC3

218 Views, 3 Replies
04-12-2012 02:13 AM

Hello!

 

I'm trying to study the effects of EC3 imperfections applied to a CAEP section (OTUA catalog)

The problem is that when I add an imperfection that follows the cross-section axis parallel to flanges, I obtain a deviated deformation.

I used an imperfection represented by a equivalent distributed force, as explained in figure 5.4 of the EN 1993-1-1:

 

e0 = 3 mm

 

q = 8 * Ned * e0 / L^2 = 8 * 16000 [daN] * 3 [mm] / (1600 [mm])^2 = 0,15 [daN / mm^2]

 

Thanks for the help!

Please use plain text.
Product Support
Posts: 4,440
Registered: ‎04-26-2010

Re: L-shaped cross section imperfections EC3

04-12-2012 03:03 AM in reply to: federico.albertengo

Take a look below (look at loacal coordinate systems). I hope you have used correct section.

 

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Buckling-equal-angles/td-p/3399339

 

disp.jpg

 

imp.jpg



Rafal Gaweda
Please use plain text.
Member
Posts: 5
Registered: ‎04-10-2012

Re: L-shaped cross section imperfections EC3

04-12-2012 03:10 AM in reply to: Rafal.Gaweda

What I want to study is the case of a L-shaped cross section CAEP that presents an in-plane buckling.

That's why I chosed that section and not the CAE section.

Please use plain text.
Product Support
Posts: 4,440
Registered: ‎04-26-2010

Re: L-shaped cross section imperfections EC3

04-12-2012 07:20 AM in reply to: federico.albertengo

It will be very hard to check this for CAEP sections. Take a look at Local Coordinate system. 



Rafal Gaweda
Please use plain text.