yes i do make simplified as proposed by Romstad (1970),
Sc = n/(1-n)*4EI/L
you can verified by make simple example and play a role with fixity factors says 0.0 trough 1.0 (increment 0.2) and plot bending moment result, and you'll get clear.
about references you prefer, how do you apply alpha_1 and alpha_2 (p.394 of the books) in SAP2000. did you ever verify?
add shoot,
Sc = n/(1-n)*4EI/L
you can verified by make simple example and play a role with fixity factors says 0.0 trough 1.0 (increment 0.2) and plot bending moment result, and you'll get clear.
about references you prefer, how do you apply alpha_1 and alpha_2 (p.394 of the books) in SAP2000. did you ever verify?
add shoot,