عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Civil engineering structures as well as office or apartment building are affected by earthquakes .A common cause of failure seems to be shear stress .The earthquake forces developed at different floor levels in a building need to be brought down along the height to the ground by the shortest path. Short column phenomena is one of the effective causes of buildings failure in past earthquakes.This destructive phenomenon is due to column height difference in a story level that is predominantly because of locating building on sloppy ground .These buildings have unequal height columns along the slope ,which causes ill effects like twisting and damage in shorter columns. Short columns comparing with slender columns attract high level of earthquake force due to high stiffness. This paper present the results of linear and nonlinear static analysis (Push over) of reinforced concrete structures on flat and slope surface. The results show that in slope structure due to short column phenomenon, earthquake force increase and column need to further reinforcement. Moreover, this phenomenon causes increasing of stiffness and decreasing in drift.