Discussion Groups

Robot Structural Analysis

Reply
Distinguished Contributor
dimogrec
Posts: 110
Registered: ‎07-16-2011

welded truss node connection

968 Views, 2 Replies
12-14-2012 04:05 AM

Hello,

I have a T truss connection with only a bending moment of 5KNm applied on the post.

The post is an RHS 100X80X5 and the chord is a SHS100X5

1) How does Robot verify the capacity of weld in this case (I tried to read the documentation here http://docs.autodesk.com/RSA/2012/ENU/filesROBOT/GUID-561050AE-712E-4D27-8168-AD06BBD657D-1075.htm  but honestly I got lost with all these components :smileyfrustrated: )

2) Is "a" the throat thickness of a weld (as described in EC3 1-8 $4.5.2) , the height of the (largest) triangle?

3) Could you explain me the difference of longitudinal and traversal weld (if I'm right longitudinal weld is the one (or two) that has direction parallel to the axes of the chord and transversal weld the weld that is directed perpendicularly to the axes of the chord). If I'm right with this, shouldn't Robot take into account the transversal weld (for bending moment) instead of checking only the longitudinal weld? I mean I have a peripheral weld or not?

4) With manual calculation (of a peripheral weld) the weld capacity is easily satisfied

In the zip you'll find rtd file of the connection and hand calculation of weld.

Thanks in advance

 

 

Please use plain text.
Product Support
Rafal.Gaweda
Posts: 5,604
Registered: ‎04-26-2010

Re: welded truss node connection

12-14-2012 06:11 AM in reply to: dimogrec

2) Is "a" the throat thickness of a weld (as described in EC3 1-8 $4.5.2) , the height of the (largest) triangle?

 

 

height of the (largest) triangle

 

The rest will be checked on Monday



Rafal Gaweda
Please use plain text.
Distinguished Contributor
dimogrec
Posts: 110
Registered: ‎07-16-2011

Re: welded truss node connection

12-18-2012 07:54 AM in reply to: Rafal.Gaweda

Thanks for the reply Rafal

After reading also this http://docs.autodesk.com/RSA/2012/ENU/filesROBOT/GUID-7D953AA2-D6C2-4646-A5FA-A038367FE76-1074.htm  I conclude that Robot assumes the effective length of the weld as described in Cidect. Am I right?

(I also found the answer for question 3 in the help page)

Please use plain text.