Answer:
When calculating according to the equivalent load method, an equivalent load is determined from the individual mode shapes. After successful determination, you can export these equivalent loads in RFEM. RFEM automatically creates load cases this way.
It is now necessary to superimpose the exported load cases in a result combination. For additional seismic loads, a quadratic superposition must always be applied. Two types of superposition are possible, the common SRSS rule and the CQC rule. All load cases from the earthquake are always assumed to be acting permanently and superimposed according to the respective regulations. The calculation rules are governed by the common standards.
