What is most important in the study of structure autodesk robot structural analysis professional or sap20؟؟

to draw a cube.

Load calculation, Properties of RCC component, Bearing capacity of soil.

look well at the rotation stiffness's of all points otherwise all structural parts will help in all directions and your structure will have all internal forces you cannot solve with steel or rebar.

Would you like to get a robotic representation there? I call on Iran. See our website sadrarobot.com

sap

The softwares we have today are used to aid us in the analysis of structures in a shorter period of time. But, even if we have these softwares, we must always apply our knowledge we have as Structural Designers. We must know wether the output the software gives is correct or not. How could you check that if we don't know the basic manual calculations? 

It depends on the structure, I think that the most complicated structures are done by SAP2000, still Robot provides many irresistible functions as reinforcement plans, so it depends on the structure, on what do you want (just moments and efforts or the whole study with documents). I am little bit lazy so I prefer Robot.