Analytical Behavior of High and Ultra-High Rise Structures Using Different Lateral Load Carrying Systems
International Journal of Advances in Scientific Research and Engineering
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
... ngs 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. .In this thesis, structural analysis for buildings consists of 15,30,45 and 60 storeys were made by ETABS (Extended Three Dimensional Analysis of Building Structures) Program to fulfill these objectives: 1. A review of the different structural systems used in constructing high and ultra-high rise buildings will be conducted. 2. The role of frames, structural (shear) walls, outriggers and lateral bracing systems in resisting lateral loads will be studied and presented. 3. Linear and nonlinear structural analysis of selected case study involving different configurations and specifications of these systems will be performed using Egyptian, European and American codes. 4. Different codes requirements for evaluating lateral loads acting on such structures will be discussed. 5. Different code limitations on lateral deformations will be checked against the suggested configurations.