Can a BIM software give alternative /optimized design and dimension of the structural member by checking given new/alternative concrete properties?

Answer 1

Yes and no.

BIM software can store and use structural data, but it doesn’t make design decisions by itself. Revit, for example, will update a model if you change the concrete properties, but it won’t automatically calculate the “best” beam size or redesign the structure.

For true optimization, running alternatives, testing loads, and sizing members, you need structural analysis software connected to BIM, like Robot, ETABS, SAP2000, or RISA. Those tools do the engineering math. BIM then becomes the place where the final geometry and information live.

Think of BIM as the brain that remembers everything, and analysis software as the calculator that does the heavy lifting.