RM Bridge Verification Examples: Euler Buckling of a Column can be found at File\Examples\Verification Examples\Euler Buckling of a Column, as shown in the link below.
communities.bentley.com/.../rm-bridge-examples
It is a verification example about the Buckle action that can be assigned in the Schedule\Schedule Actions at any Stage in Analyzer. It adresses the Euler buckling theory derivate from the basic Euler-Bernoulli beam theory. For the Critical Euler buckling load formulae some assumptions and simplifications are made. For example, this one is within the elastic limit:
Pcritical= Pi2*EI/L2
The buckling curve is a relation between buckling stresses and column slenderness. In general, the flexural buckling for columns is defined at the Codes and the buckling shapes are well known curves where the k effective length factor depends on the boundary conditions applied.
More technical information about the data and the specific example and results can be imported from the dataset and accessed at the .pdf for the Verifications documentation.