Comparative Study of Seismic Analysis between Conventional RC Frame and Flat Slab with Drop

The speed growth of population in urban areas and the consequent pressure on limited space considerably influenced tall building constructions in developing countries like India. These tall buildings can be constructed using various structural systems. At present, normally conventional RC Frame buildings are adopted for the construction. These structures are usually adopted to overcome the large moments developing due to the applied loads. On other hand, the flat slab structural systems in which slab is directly rested on columns have been used in many buildings constructed recently due to the advantage of increased clear floor to floor heights to meet the economical, easier form work, shorter construction period and architectural demands. In the present work conventional RC frame and Flat Slab building of G+3, G+7, and G+11 storey structural models are considered. The vulnerability of purely frame and purely flat slab models for seismic load is analyzed considering different soil conditions and seismic zones. An attempt is made to compare the response of conventional RC frame model and flat slab model for earthquake load. The analysis is carried out with both equivalent static method and response spectrum method. Parameters like lateral displacement, time period, storey drift and base shear are computed using analytical software and comparison is made between both structural systems and the results are presented.