Seismic Demand of Reinforced Concrete Structural Systems

ABSTRACT This paper deals with evaluation of response reduction factor of various reinforced concrete structural systems. The response reduction factor (R) also known by the name response modification factor depending on the perceived seismic damage performance of the structure, characterized by ductile or brittle deformation. The concept of R factor is to de-amplify the seismic force and accounts nonlinearity with the help of over-strength, redundancy and ductility. Pushover analysis was performed for building systems such as OMRF, OMRF with shearwall and OMRF with cross bracing for10, 15, 20 stories using ETABS v15.1.0. Various seismic demand parameters such as overstrength factor, ductility factor, response reduction factor are obtained for different structural systems are calculated for various systems.