How is the response factor calculated?
Answer: ETABS and SAP2000 calculate response factor (RF) using the following equation:
- RF = [2.31 – 0.41 log (100 (Case + Link damping, express in ratio))] / [2.31 – 0.41 log (100 (Function damping, express in ratio))] ,
- Newmark, Nathan M.; Hall, William J. Engineering monographs on earthquake criteria, structural design, and strong motion records. Berkeley, CA: Earthquake Engineering Research Institute, 1982. Print.
- Comartin, Craig D.; Niewiarowski, Richard W. ATC-40, Seismic Evaluation and Retrofit of Concrete Buildings, Volume I. Redwood City, CA: Applied Technology Council, 1996. Print.