Results of Analysis in ETABS and ROBOT

[a7medamria123]

I have a problem with results of Analysis of structure model. I have founded a large difference in results for floors, beams and columns using ETABS and ROBOTS.

For ex: The max. reaction of column for ETABS equal 148.4433 ton, and for ROBOT equal 79.19 ton

and also the values of Moments in Beams and Floors are different. Knowing that the design code in two software is Euro Code and the design parameters, loads and section properties are same 

So, How I fix this problem ?MAX Reaction In ROBOTMAX Reaction In ETABS

[Krzysztof_Wasik]

Hi @a7medamria123 

Check and compare the sum of reactions in both models for applied load cases/combinations 

[a7medamria123]

There is a difference also in values of Total Base Reactions. 

In Robot, Total Base Reaction = 790.95 ton

In Etabs, Total Base Reaction = 1624.42 ton

@Krzysztof_Wasik 

[Krzysztof_Wasik]

Hi @a7medamria123 

It seems that load applied in ETABS is two times bigger that in Robot

[a7medamria123]

No, The applied loads are same ( Dead and Live ) 

[Krzysztof_Wasik]

HI @a7medamria123 

Maybe applied values are the same but for some reason loads are applied twice to the same objects in ETABS. Maybe you compare combinations with different coefficients defined for load cases. Sum of reactions shows that total applied loads are not the same.