Earthquake check is required for many structures today. This can be done in Focus Konstruksjon by running a response spectrum analysis which includes design check according to Eurocode 8. This analysis is a quick and easy way to find what percentage of capacity the structure loses due to earthquakes.

This is a linear-elastic analysis that is limited to structures with a low ductility class. In other words, the analysis is adapted to Norwegian conditions. In the analysis, you can either use design spectrum or elastic spectrum. The analysis is a modal analysis which ensures fast calculation time. It is possible to specify how many modes to include in the analysis, as well as material stiffness and whether to include geometric stiffness. The analysis works in both 2D and 3D.