Seismic performance evaluation of tall buildings with different structural system

Rapid urbanization in developing and developed countries and housing and workplace requirements created by the growing population demands more number of storeys for tall buildings. As the number of storeys in the building increases, the earthquake and wind loads are making it even harder and different effects on the building. The requirement for the evaluation of earthquake performance of current buildings and buildings that will be built in near future become apparent because of the fact that our country is located on an active earthquake region, previous earthquakes caused financial damage and the number of deaths due to earthquakes. The purpose of the study is to evaluate the earthquake performance of tall buildings with different structural systems. For the aim, three reinforced concrete tall buildings of 30 storeys are composed different structural systems which core+frame, core+frame+ steel braced elements, core+frames+shear walls. Earthquake performance evaluation of three different buildings were performed by using nonlinear dynamic time history analysis. Structural models were built in SAP2000-V19.2.1 environment considering the material and geometric nonlinearity of the structural components. Dynamic analyses were carried out by using scaled time history records on the basis of the TSC2016 (draft) earthquake design spectra. The study consists of five main chapters. In the first chapter, previous works about performance based design and the purpose of the study are defined. The second chapter of this study, development process of the tall buildings are explained. In this chapter, design trends of tall buildings are examined in chronological order and solutions of the problems that encountered in the design process of structural systems are summarized. Detailed information about the structural system developments and classifications of the tall building systems are given, some important aspect of structural system configurations are reviewed. In the third chapter, the TSC2016 (draft) regulation are summarized the design principles based on linear analysis and performance based analysis. Detailed information about the methods used in the calculations are given. The fourth chapter is devoted to the earthquake performance evaluation of three reinforced concrete tall buildings based on nonlinear time history analysis. In this chapter, detailed information about structural system properties of the building, selection and scaling procedure of earthquake records and recommendations on modeling process of the structural components for nonlinear analysis are given. In addition, some important points when constructing the nonlinear analysis model and suggestions for structural elements modeling in the analysis program are given. The results obtained at the end of the analyzes were evaluated comparatively. Finally, the results obtained from three different models are summarized by using tables and graphs, and then results are examined comparatively. The appendices are given the Appendices chapter of this study. In this chapter, important data entry information used for nonlinear modeling of the structural components and calculated usage ratio tables of the structural components for performance evaluation of the structural system are presented.