The rapid increase of the urban population in developing countries such as India has forced the revaluation of the importance of high rise buildings with different size and shape which leads to a different aspect ratio of the buildings. The structural systems of high rise buildings are usually sensitive to the effects of wind & earthquake, the wind-earthquake-structure interactions and then determines the wind loads & earthquake loads as equivalent static loads. It has been proved that the aspect ratio of the building affects the effect of wind and earthquake forces on the building. These thesis study the different cases of the aspect ratio of the building and effect of wind and earthquake forces on the building.