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calculation too slow

klejdin 2021-09-25 11:42:50

I have the last update of the software
I'm modeling a small building the calculation took 1 h tha verification part

is there any solution about that?

best 429346_1632562964_capture.jpg


klejdin 2021-09-26 02:03:12

is there any way to solve this issue. in the previous software this type of building was made faster



Tony 2021-09-27 12:50:20

Although your structure may seem small from a geometrical point of view, it has over 46,000 FEM elements between shell and beam nodes.
Furthermore, the slowing down in the calculation phase is due to the verification of the torsional deformability with the method by slab floors, which requires further calculations. By activating the "modal" method (even more rigorous because it is based on the vibration modes of the structure) and increasing the pitch of the shells to 80x80, the calculation process can be reasonably reduced.

file with changes attached.


klejdin 2021-09-28 10:38:19

I have recalculated with BIM ONE 2 C (V44) also by floor torsion and it was done 15 min max verification. How is that possible?

How to change the pitch of the shells?



klejdin 2021-09-28 11:14:36

regarding the HP shell i found how to change thanks

the torsional by "modal" where is based on the Eurocode?



Tony 2021-09-29 16:57:14

Yes, the modal method is definitely one of the most rigorous methods that can be adopted for this kind of evaluation. In Fact, the Ω ratio between periods of preponderant translational and preponderant torsional modes of vibration is calculated. This method can be used only in the case of seismic calculations in modal dynamic analysis.

This method has a general validity and provides more correct and rigorous results than the "slab method" which, in the case of inclined decks (such as in roofs), or of split level floor slabs or decks with high dimensional variations between one floor and another (as at your last level), this may lead to incorrect evaluations.


Tony 2021-09-30 16:55:22

The Eurocode only provides the criterion for defining the torsionally deformable structure, it does not provide methods for calculating such ratio.
This method is contained in other international standards, such as the Italian one (which derives from Eurocodes), as well as being a technical reference also available in international literature.