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## Robot Structural Analysis

Valued Contributor
Posts: 96
Registered: ‎07-16-2011

# welded truss node connection

882 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 )

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.

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Product Support
Posts: 4,993
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
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Valued Contributor
Posts: 96
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)

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