Seismic response modification factor for special concrete structures based on pushover &non-linear time history analyses

Abstract

Reinforced concrete (RC) structures are able to dissipate a large amount of energy during earthquake (EQ). RC structures designed to resist EQs must have enough strength and stiffness to prevent any possible collapse as well as to control deflection. Seismic codes include the response reduction/modification factor(R) in calculation of equivalent lateral forces used for EQ resistant buildings design to reduce elastic design spectral acceleration of the RC structure to account for ductility and over strength. Furthermore, the aim of this research is to investigate the variation of seismic response of special RC structures with different configurations, such as elevated metro stations. Consequently, the response reduction factor can be evaluated. Then the calculated response reduction/modification factors (R) for reinforced concrete (RC) structures will be compared to those specified in ECP and the ASCE code. For this purpose, a 3D Finite Element Method was used for modelling RC structure using ABAQUS V.6.14 program.