To calculate the value of Response Modification factor "R" of any structure, a nonlinear static analysis can be done and for that linear static design is usually carried out. During that stage, a vale of R (based on the standard followed) is given to calculate the base shear for design. Doesn't that predefined value affect the final result?
Mahadev Singh Saud
i think this is only valid in linear structure more than 0.95 but in other structure it is lesser up to 0.1.
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Chikh Benazouz
Dear Priyana
In ATC-19 (ATC 1995a), the R-factor is a combined effect of over-strength R_Ω factor, ductility factor R_μ and redundancy factor R_R that influence the structure response during earthquakes.
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