Leaderboard

You seem to be approaching your modelling without clear and basic understanding of what constitutes as structural system in this kind of floor. What I see, when I look at this picture is: a floor in which loads are carried directly by beams, which in turn transfer the forces to girders; beams are laterally braced by cross-members. So, you need to model your beams and girders with line elements. And why would you take your modulus of elasticity as 0.00001? E is responsible for providing stiffness. If E is 0, it means do not have any structural member! I am sure that is not the case.