The seismic analysis is carried out by means of a complete modal spectral analysis which resolves each mode as a loadcase and carries out the modal expansion and the modal combination to obtain the forces.

More information at CYPECAD. Seismic analysis:

• Effect of non-structural construction elements on buildings’ seismic behaviour
• Seismic design criteria by capacity for supports and concrete beams
• Base shear correction
• Fundamental period of the structure with user value
• User-specified seismic spectrum

Detailed information on the seismic analyses is also available in the "CYPECAD – Calculation report" manual, which can be accessed from the main CYPE program menu or from the CYPECAD "Help" drop-down menu.