Investigation of nonlinear behavior of reinforced concrete buildings considering torsinol irregularity

Our country is located on the Alpine-Himalayan earthquake zone, which is an effective earthquake zone, it has experienced the earthquake in its most difficult situations with short time intervals. The fact that earthquakes were so effective showed that a certain regulation was required. The first earthquake regulation came into force in 1940 and was renewed at different time intervals. However, with the development of information and technology over time, earthquake regulations have been developed and updated with different time intervals. The last earthquake regulation in Turkey came into force on January 1, 2019. Within the scope of this thesis, new regulation rules were taken into consideration in the search of the earthquake performances of the existing buildings. Depending on the deformation, evaluation and design approach has been used. "Nonlinear Time History Analysis" was selected. In this study, two buildings covering the pre-1998 period were designed to represent the existing building stock. The buildings are modeled in the SAP2000 program using the 2019 TBDY regulation. All properties of the 5-storey buildings with reinforced concrete shear wall-framed carrier system are the same except for the shear wall locations. Shear walls are bearing system elements that provide the greatest resistance against horizontal force under the effect of earthquake, limit displacements and prevent torsions. However, irregular settlements create torsional irregularity in buildings. The effect of shear walls on torsional irregularity was investigated. The earthquake performances of the buildings designed to be regular and irregular have been compared. It has been investigated whether the target earthquake performance level has been achieved by examining the sectional damage. By evaluating the results of the analysis, it was concluded that the irregular placement of the shear walls reduces the earthquake performance in the buildings, creates the torsional irregularity and in this case increases the displacements.