With these add-ons, you are on the safe side even in the event of an earthquake.
The Modal Analysis add-on for RFEM 6 / RSTAB 9 allows you to quickly and conveniently analyze natural frequencies and mode shapes of your member, surface, and solid models.
In the Response Spectrum Analysis add-on for RFEM 6 p;/ RSTAB 9, you can perform a seismic analysis using the multi-modal response spectrum analysis. Create the spectra required for this either in accordance with the standards or tailored to your needs. The program uses them to generate the equivalent static forces. Moreover, discover the extensive library of accelerograms from seismic zones included in this add-on that you can use to generate response spectra.
Modal Analysis Add-on for RFEM 6 / RSTAB 9 Response Spectrum Analysis Add-on for RFEM 6 / RSTAB 9