My point of view: Modifiers are very useful for driving the concrete behavior. Modifiers, concrete, steel bars, plans details and constructor technology are necessary guests to obtain the structure born in our mind. Then, initial modifiers suggested for ACI 10.11.1 must be adjusted when we...
Try and see. Model one slab of 240x240in, 4 beams and columns. Modify m22=.01, m12=.01 (don't use zero). Load slab with 0.4096 Kip-ft. Mesh it 6x6. Run model. See M33 on beams. See M11 vs. M22 on slabs. Good luck
