Behavior of Torsional Effects of Asymmetric Pyramid Shape High Rise Building in Seismic Zone

High rise building with general pyramid geometry have been increasing used in new development zones. It is seen that even in high prone areas, there are many high rise building under design and construction. On the other hand, in relevant seismic codes there are no specific criteria for such type of structural systems. The structural systems in these buildings are moment resisting frames with or without bracing frames or shear walls. The structural elements are usually composed of beams and vertical columns in middle part and inclined columns in side faces of buildings. The inclined column element in this type of structure makes the structural behavior in different manner. Nevertheless, there are some special structural aspects of these building, especially due to earthquake events; one of the most important obscurity manners is extremely torsional effects structures of asymmetric pyramid building especially in lower stories. In this paper the results of numerous analytical studies performed for asymmetric, symmetric pyramid structures compared with regular structure and compare to codes requirement are shown.