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Valued Mentor
tony.ridley
Posts: 636
Registered: ‎09-07-2011

Errors in AS4100 steel code design - axial tension and bending

260 Views, 7 Replies
10-25-2012 04:28 AM

Hi guys,

 

Sorry for bad news, but also, a problem with tension members in AS4100.  

 

1.JPG

 

2.JPG

 

 

Robot does not use the correct Mty / Mrz value.  However unlike Patricks' problem this appears to be on the conservative side.

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Artur.Kosakowski
Posts: 4,249
Registered: ‎12-17-2010

Re: Errors in Canadian steel code design - axial tension and bending

10-25-2012 04:34 AM in reply to: tony.ridley

Thank you Tony. We'll check this too.



Artur Kosakowski
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Artur.Kosakowski
Posts: 4,249
Registered: ‎12-17-2010

Re: Errors in Canadian steel code design - axial tension and bending

10-25-2012 05:44 AM in reply to: tony.ridley

Tony,

 

Could you send me the corresponding rtd file please? Thank you.



Artur Kosakowski
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Valued Mentor
tony.ridley
Posts: 636
Registered: ‎09-07-2011

Re: Errors in Canadian steel code design - axial tension and bending

10-25-2012 05:50 AM in reply to: Artur.Kosakowski

tomorrow? when i get to work

 

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Artur.Kosakowski
Posts: 4,249
Registered: ‎12-17-2010

Re: Errors in Canadian steel code design - axial tension and bending

10-25-2012 05:53 AM in reply to: tony.ridley

Sure :smileyhappy:



Artur Kosakowski
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Artur.Kosakowski
Posts: 4,249
Registered: ‎12-17-2010

Re: Errors in AS4100 steel code design - axial tension and bending

10-25-2012 07:48 AM in reply to: tony.ridley

Tony, 

 

1.JPG

 

 

I asume this is the situation when the axial force changes from tension to compression along a bar. At  x = 0.73L N= -399 kN (tension) and this force is used for the Section Strength Check part. In addition Robot makes another check using the largest axial force along a bar (N* = 631 compression this time). This is the force used in the Member Stability Check part. As far as I can see the verification procedure is done correctly yet the verification formula displayed in the result window for the Member Stability Check is wrong. Robot should display the formula 8.5.5.1 instead of 8.4.5.2.

I other words the value of 1.05 displayed for 8.4.5.2 is (correctly) calculated with the use of 8.4.5.1 and what is wrong is the display of the formula (should be 8.4.5.1 instead of 8.5.4.2).

 

The rtd file would be welcomed anyway :smileyhappy:

 

 


 



Artur Kosakowski
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Valued Mentor
tony.ridley
Posts: 636
Registered: ‎09-07-2011

Re: Errors in AS4100 steel code design - axial tension and bending

11-06-2012 05:22 PM in reply to: Artur.Kosakowski

Hi Artur,

 

I've (finally) attached the file mentioned previously. 

The bar I'm looking at in the previous post is #17

 

I agree with your comments;

 As far as I can see the verification procedure is done correctly yet the verification formula displayed in the result window for the Member Stability Check is wrong. Robot should display the formula 8.5.5.1 instead of 8.4.5.2.

I other words the value of 1.05 displayed for 8.4.5.2 is (correctly) calculated with the use of 8.4.5.1 and what is wrong is the display of the formula (should be 8.4.5.1 instead of 8.5.4.2).

 

Cheers,

Tony

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Artur.Kosakowski
Posts: 4,249
Registered: ‎12-17-2010

Re: Errors in AS4100 steel code design - axial tension and bending

11-06-2012 11:22 PM in reply to: tony.ridley

Thank you Tony.



Artur Kosakowski
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