The Verification Example 4, for a Snap Back Problem, has the objective to verify the load-displacement control method for post-collapse analysis of structures. The structural model is of a plane frame, as shown in the picture below. The load is increased and the results are shown in the deformed shape of the structure below and at the displacements Time History plot.
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.