The Seismic Performance Evaluation of An Eccentrically Braced Steel Frame by Non-Linear Analyses

Bu calismada, Deprem Bolgelerinde Yapilacak Binalar Hakkinda Yonetmelik-2007 (DBYBHY-2007) ye gore boyutlandirilan alti katli dis merkez caprazli bir celik perdenin deprem performansi, zaman tanim alaninda dogrusal olmayan hesap yontemi kullanilarak degerlendirilmistir. Bu degerlendirmede goreli kat otelemeleri, kat kesme kuvvetleri, capraz ve kolonlarin ic kuvvet istemleri ile bag kirisi kesme kuvveti ve donme istemleri dikkate alinmistir. Zaman tanim alaninda dogrusal olmayan analizler yedi adet deprem ivme kaydi kullanilarak gerceklestirilmistir. Analizler sonucu elde edilen istemlerin ortalama degerleri esas alinarak dis merkez caprazli celik perdelerin kullanildigi orta yukseklikteki binalar icin DBYBHY-2007’de ongorulen kapasite tasarimi yaklasiminin yeterliligi arastirilmistir. The goal of this paper is to investigate the non-linear response and to assess the seismic performance of a six story eccentrically braced steel frame (EBF). For this, split-K-braced EBF with high ductility level designed according to the Turkish Earthquake Code-2007 (TEC-07) is analyzed under seven selected earthquake records. The performance of the EBF is assessed considering drift, story and base shear demands, brace and column axial forces and bending moment demands, link beam shear force and rotation demands. Mean values of the demands are used in the performance assessment. The provisions based on capacity design approach specified in TEC-07 for EBFs with high ductility level are discussed by employing the findings..