Can a R/C moment frame ever go pass 1% interstory drift without collapsing (NLTHA)

[darrennthnl]

I've iterated over dozens of models, all up to standard (SMF). .All does very well in pushover (ductile)

But then Everytime I do a NLTHA, it either gets low drift (less than 1%) or it collapses, there is no in between, never a LS/CP case. I've analyzed it against various earthquake records, played with the scale factor, the results stays the same, it is always IO or CP.

Please tell me what I'm doing wrong? is it an inherent flaw of R/C frames? I do think 40 mm displacement for a concrete is very huge, so makes sense why it can never go to life safety.