The model you have sent is in CAE format and it is of a higher version of abaqus. It would help if you copy the input file to notepad and send it using txt format. And again providing rotational spring and imperfection will not alter buckling load if you use Linear Perturbation (Buckle...
Dear njain094,
Before starting further studies in buckle analysis, you should know that buckle analysis is very different from general static analysis. End restraints, imperfect members a and member with combined loading can be solved in buckle analysis, but the eigenvalues you get finally...
