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Multistoried buildings with open ground floor are inherently vulnerable to collapse due to earthquake load, their construction is still widespread in the developing nations due to social and functional need for provide car parking space at ground level. Engineering community warned against such buildings from time to time. Dynamic analysis shall be performed to obtain the design seismic force, and its distribution to different levels along the height of the building. It should be performed for both regular and irregular building. These are provisions in IS 1893 (part 1) 2002, with respect to height of building and according to irregularity of the building. In regular building greater than 40m height in zone IV and V is required and greater than 90m height in zone II and III. In irregular building greater than 12m height in zone IV and V is required and greater than 40m height in zone II and III. In this case study R.C.C. building is modeled and analyzed in four cases. I) Model with bare framed. II) Model with infill walls. III) Model with shear walls at bottom storey. IV) Model with steel bracing system at bottom storey