This is the 2m * 1.2m section and the corresponding nonlinear temperature points defined in Modeller
This is the same section and its nonlinear temperature profile that is shown in the Analyzer
1. For the 2nd temperature point counting from the top down, it is in the "red" region, which is in the range of 18-25 degree; for the 3rd temperature point, it is in the "yellow" region, which is abou 12 degree.
While in the modeller, this 2nd point corresponds to 6.7 degree only, and 3rd point corresponds to 0 degree.
Why there are the differences?
2. I made a test:
A 10m long beam with both ends fixed. The section has the above nonlinear temperature profile.
Below are the axial forces from RM Bridge, Lusas and Sofistik
Below are the moments from RM Bridge, Lusas and Sofistik
This is results by hand
As you can see,
the axial force from RM Bridge (3821 kN), while it is 1072 kN from Lusas, Sofistik and hand-calculation
the moment from RM Bridge (3269.5 kNm), while it is 962.5 kNm from Lusas, Sofistik and hand-calculation
RM Bridge model is attached.
RM Bridge.zip
Hi netsonic, Thank you for the file.
If non-linear temperature profile is not well displayed in Analyzer results won't be correct.
Something is going to be investigated by our Development team about this matter.
Although, there is another way for calculating non-linear temperature in RM, that is through "TempVar" schedule action.
Using this way, the diagrams obtained are the below ones:
Let me know if any other help is needed.
Best Regards,
Ana Carla
Ana Carla Peres
Senior Technical Support Engineer
Bentley BrIM
Answer Verified By: netsonic
Hi Ana
Thank you for the tip about "TempVar". But the results from TempVar still do not match those from Lusas, Sofistik and hand-calculation.
Axial force: "TempVar" shows 1136.6, Lusas, Sofistik and hand-calculation all shows 1072
Moment: "TempVar" shows 1146 while Lusas, Sofistik and hand-calculation all shows 962
The model is too sensitive due to the restraint conditions, either.