1 - Bug in definition of parameter q (elastic acceleration demand at yielding Sa,e(Ty) over yielding strength Say) in N2 method
q=Sa,e(Ty)/Say
According to Fajfar [2000]
2- The modification for Sdi > 3*demand_Sd_Ty at line 57 and 58, this is not present in the original paper
1 - Bug in definition of parameter q (elastic acceleration demand at yielding Sa,e(Ty) over yielding strength Say) in N2 method q=Sa,e(Ty)/Say According to Fajfar [2000]
2- The modification for Sdi > 3*demand_Sd_Ty at line 57 and 58, this is not present in the original paper
Fajfar [2000] "a nonlinear analysis method for performance based seismic design", Earthquake Spectra, 16(3), http://30let.ikpir.com/data/bibliografije/att/1085537.fulltext.pdf