COMPARATIVE SEISMIC RESPONSE OF STIFFENED RCC FRAMES LOCATED IN UTTARAKHAND

Considering the past earthquakes in India, the regions of Chamoli, Uttarkashi, Rudraprayag and numerous other areas in Uttarakhand have been repeatedly jolted by earthquakes. This study compares the seismic response of Reinforced Concrete frames incorporated with diverse steel bracings systems exposed to the ground motions of Chamoli earthquake. The structural response of Moment Resisting frames (MRs), VBraced frames (VBs), Inverted V-Braced frames (IVBs) and X-Braced frames (XBs) are analyzed for storey heights of 4, 8, 12 and 16. The responses of each frame in terms of base shear, displacement, plastic hinge formation are studied by pushover analysis. The time based roof displacement, global damage index, over-strength factor, design factor are studied using time-history analysis. Etabs 2016 software is utilized for carrying over both non-linear pushover and dynamic time-history analysis. Comparative analysis shows enhancement in structural response of RCC frames as expected.