Response Modification Factor (R)

Plain Definition: A code-defined factor that reduces elastic seismic forces to account for inelastic behavior.

Technical Description: R reflects system ductility, overstrength, and redundancy. Higher R = greater inelastic capacity.

Use in Design: Used to calculate reduced design base shear in codes like ASCE 7.

Meta Title: Response Modification Factor (R) | Seismic Force Reduction

Meta Description: Understand how the R factor lowers seismic demands based on system ductility and resilience.