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FAQ 004237 | When designing seismic equivalent loads with a Response Spectra Analysis (RSA) in RF...
First Steps with RFEM
When designing seismic equivalent loads with a Response Spectra Analysis (RSA) in RFEM, how can I apply the modal response parameters Ie/R according to Sect. 220.127.116.11 in the ASCE 7-16 to my results?
The modal response parameters can be set in the RF-DYNAM PRO - Equivalent Forces add-on module under the Response Spectra tab. In the Code Parameters table > Type of Spectrum > Modal Response Parameters, the default is set to "No Modification". This setting can be seen in Figure 1.
Changing this to "Force Related" in the drop-down window will divide the response spectra by Ie/R based on Sect. 18.104.22.168 . Additionally, in the Code Parameters table > Coefficients, the Seismic Importance Factor (Ie) and the Response Modification Factor (R) can further be set.
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