No damage.

Minor yields that correspond to minor permanent deformations at critical sections of a small percentage of columns and/or braces.

For class 1 sections according to EC3, moderate yields corresponding to moderate permanent deformations at critical sections of a moderate percentage of columns and/or braces without any global buckling failure of columns.

For class 2 and 3 sections according to EC3, minor-to-moderate yields that correspond to minor-to-moderate permanent deformations at critical sections of a moderate percentage of columns and/or braces without any local buckling at critical sections of columns.

For class 1 sections according to EC3, major yields causing major permanent deformations at critical sections of a large percentage of columns and/or braces with global buckling failure of columns where maximum compression occurs.

For class 2 and 3 sections according to EC3, minor-to-major yields that cause minor-to-major permanent deformations at critical sections of a large percentage of columns and/or braces with local buckling of critical sections at the columns where maximum compression occurs.

Buckling failure with subsequent collapse of the pressure vessel.