Browsing by Author "Kor, Efecan"

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Seismic performance assessment of concentrically braced steel frames designed to the Turkish Building Earthquake Code 2018
(Elsevier, 2022-06) Kor, Efecan; Özçelik, Ahmet Yiğit; Civil Engineering; ÖZÇELİK, Ahmet Yiğit; Kor, Efecan
The Turkish Building Earthquake Code 2018 (TBEC 2018) came into force in 2019 and superseded the previous code, the Turkish Earthquake Code 2007 (TEC 2007). Compared to TEC 2007, TBEC 2018 includes new design approaches as well as significant changes in the design of steel structures which are likely to notably affect the seismic design and performance of concentrically braced frames (CBFs). This study aims to quantify the seismic performance of CBFs designed to TBEC 2018. To this end, a set of archetypes was designed, covering a wide range of building heights, bay widths, and seismic hazard levels. Nonlinear numerical models of the archetype buildings were built to perform nonlinear static and dynamic analyses. The seismic performance assessment framework outlined in FEMA P-695 was adopted. The effects of build height, bay width, and seismic hazard levels were investigated and reported. The results of the study revealed that CBFs located in moderate-seismic regions showed acceptable performance while CBFs designed to TBEC 2018 performed poorly in high-seismic regions.
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Seismic performance evaluation of concentric X-braced steel frames designed to the Turkish building earthquake code 2018
Kor, Efecan; Özçelik, Yiğit; Özçelik, Yiğit; Altay, Gülay; Müderrisoğlu, Z.; Department of Civil Engineering; Kor, Efecan
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.