India is rapidly developing in every aspect now. As aresult of which number of smart cities are now arising. whilebuilding such smart cities major role is played by infrastructuraldevelopment. In this infrastructures, speedy and economicalconstructions are expected to make them more effective. Amongsuch effective construction systems, Flat slab system is the oneand is being widely applied on large scale. Flat slabs are thin solidreinforced concrete slabs which are supported directly by columnswithout beams. Flat slab system is now well adopted forconstructions of high rise multi- storied commercial, residential,institutional buildings. They have adventitious constructive,architectural and economical features including easier formwork,speed of construction, spaciousness, etc. The purpose of thisproject is to study the seismic behavior of Flat Slab Structure fordifferent seismic zones by assessment of Response ReductionFactor using Pushover analysis. Response reduction factor is thefactor by which intensity of seismic waves produced duringearthquake (maximum elastic base shear) can be reduced tocalculate the design base shear. In the project parameters such asbase shear, shear and bending stresses and deflection check in flatslab structure are examined by using ETABS Software