A parametric study of RC moment resisting frames at joint level by investigating Moment -Curvature relations

Nonlinear analysis can evaluate actual performance of a structure during an earthquake. Among various simplified nonlinear analysis procedures and approximate methods to estimate maximum inelastic displacement demand of structures pushover analysis is a significant one. To perform pushover analysis moment curvature (M-φ) relation at hinge level needs to be defined. M-φ relation of RC frames are complex in nature due to a unique bonding of two materials with completely different mechanical properties. In this paper, numerically derived M-φ relation of beams and columns is used to investigate the effect of different parameters on it. This paper will be helpful in deciding which parameter to alter and the amount of it to get expected strength and ductility. It will also be useful to designers in defining M-φ relation during pushover analysis.