Seismic Behavior Of Multi Storied RCC Building Having Vertical Mass Irregularity

This study presents the procedure for seismic evaluation of vertically mass irregular reinforced concrete frame buildings based on a concept of the capacity spectrum method. When the previous recent earthquakes in many parts of India and globe are concerned this reveals the issue regarding the vulnerability of existing buildings. The existing building structures which were designed and constructed according to earlier code provisions do not satisfy requirement of current seismic code and design practice. Many reinforced concrete buildings in urban regions lying in active seismic zone may suffer moderate to severe damages during future ground motion. Therefore it is essential to lessen unacceptable hazards to property and life of occupant. In this study, 3d analytical model of twelve storied buildings have been generated for vertically mass irregular buildings. Models are analyzed using structural analysis tool ‘ETABS�. The analytical model of the buildings includes influence of the mass at different storey of the structure i.e. at 4th floor, 8th floor and 12th floors respectively. And the results are compared for models having irregular mass at different floors with regular frame. Also the results of Linear Static (Equivalent static method) and Linear dynamic Analysis (Response spectrum Analysis).