Using real records of seismic impacts with the maximum amplitude of acceleration and the spectra of these impacts, the reactions of a steel frame idealized as a system with one degree of freedom were calculated on an analog machine. In this case, the reactions were determined in the elastic and elastoplastic stages.
Forces were applied to the prototype, corresponding to the calculated values of deformations of the extreme fibers of the frame columns.
The results of testing all samples at a constant amplitude of deformations are plotted on the graph.