Abstract-The response of engineering structural components to a time varying load is of practical importance for the design of structures. This time varying load may be due to the acceleration imparted to the ground surface during earthquake or due to the wind forces acting on structure which can be approximated as periodic load. In this paper an attempt has been made to determine the response of a G+3 RCC building modeled in STAAD Pro when subjected to periodic loads. The building was subjected to rectangular, triangular and sinusoidal periodic load for 30s with maximum magnitude of 100kN and having time period of 1s. Further a comparative study was conducted to determine the response of such loads on front, roof and side surface of the building. It was observed that the critical deformations were obtained on the front and roof surface of the building. It was also observed that the variation of critical deformation along the height of building is parabolic in nature with maximum deformations at the top surface of the building. Moreover, it was also concluded that the velocity and acceleration with which the surfaces of the building vibrate, when subjected to periodic load was critical.