Why is the reduced result for panels NRx value different to the reactions integral value?

[HRahmanMKEP2]

So I have a small building model which for information is not orthogonal to the global work-plane. When I calculate the reactions I am getting discrepancy in results between the integral reaction value and the reduced results for panels NRx value.

For one panel here is the results:

Integral reaction on this panel = 407.92 kN

Same panel the reduced results NRx = -370 kN see below:

I have also took the cut length of the panel to work out line load reaction using the NRx/cut length

and this is still different to the average reaction.

Does anyone know the explanation behind this discrepancy and does the work plane play a role in this? 

[Simau]

Hi @HRahmanMKEP2 

please zip and share your model

[HRahmanMKEP2]

Please see zipped attachment of the robot model without results thanks 🙂

[Simau]

Hi @HRahmanMKEP2 

Work-plane orientation has nothnig to do with the results. Results accurency depends on mesh size.

Some warning messages were fixed

[HRahmanMKEP2]

In the snapshot you have shown for both mesh sizes why is there a difference in the NRx value and the Fz I thought they were the same?

[Simau]

You will never get 100% accurancy. 

The smaller size the better accurancy

[HRahmanMKEP2]

Makes sense. What actually is the difference between Fz and NRx in this case so how is it calculating differently. Is NRx the benchmark to use for design?

[Simau · Accepted solution]

Robot uses NRx to design wallss

[HRahmanMKEP2]

thanks I'll close the thread 🙂