Analytical Behavior of High and Ultra-High Rise Structures Using Different Lateral Load Carrying Systems

Abstract

A real residential building consists of 15 stories which have been built in Cairo – Egypt is studied against lateral loads, also the linear analysis repeated for the same building after increasing the number of repeated stories reaching 30, 45 and 60 stories,
using two lateral load resisting systems which are outriggers and bracing systems. The ETABS 2015 program is used to analyze
all the buildings by the Egyptian, European and American codes. The most common high rise buildings in Egypt consists of 15 to
30 stories, so linear analysis was conducted to the 30 stories building using Egyptian, European and American codes but in different region and soil type than what they were studied. Seismic demands were studied are the base shear force resulted from
the seismic loads on the structure, the inter-story drift between the stories of the structure, the maximum displacement of the
structure and the weight of reinforced concrete and steel bracing in the structure. Finally, the nonlinear analysis applied to the 30
stories building. It is concluded that the Egyptian code gives base shear, maximum displacement and total weight of the building
more than that of the European and the American codes, the buildings contain outriggers and belts system have more weight than building contain bracing system while the both have the safety requirements for the building, the total weight of the building
increased slightly by changing the region of the building from the seismic region to higher seismic region while the quantity of the lateral load resisting system increased extremely, finally the nonlinear analysis of the buildings give near results to the linear
analysis so the linear analysis can be dependable