Türkiye bina deprem yönetmeliği 2018'e göre tasarlanan merkezi X çaprazlı çelik çerçevelerin sismik performans değerlendirmesi

Concentrically braced steel frame systems are frequently used lateral load resisting frame systems, especially in highly seismic regions. Those systems are preferred due to their significant contribution of lateral stiffness and strength of the structure. Other advantages of CBFs can be expressed as their elastic stiffness that provides to satisfy the serviceability deformation limits compared to other lateral load resisting frames, as well as their contribution to the ductility of the structure by allowing inelastic deformations within the system. However, they must be designed and detailed carefully to maintain the general stability of the system and to avoid a brittle and sudden local failure. These details and related design approaches have been specified by various design regulations and guidelines, including the Turkish Building Earthquake Code 2018 (TBEC 2018) which came to force in January 2019. With this code, not only a number of new design approaches that did not take place in the previous version were introduced, but also various definitions and approaches were revised. These changes can be expected to influence the dynamic behavior and seismic performance of CBFs designed per TBEC 2018. From this perspective, in this research it is aimed to investigate the lateral behavior and seismic performance of CBFs. A set of CBFs were designed to TBEC 2018 and a nonlinear numerical model was developed to simulate the designed CBFs. Afterwards, several nonlinear static and dynamic analysis procedures were followed to obtain and evaluate the dynamic behavior and seismic performance of CBF systems. Results and findings are reported at the end of each study and summarized in the conclusion.