Fermuar çapraz kullanılarak çelik binaların deprem performansının iyileştirilmesi

Chevron brace (or inverted V brace) is a common type of the concentric braces. The seismic performance of such system is governed by the buckling of the first story brace in compression. At large, the force redistribution capability of this system has not performed well in severe earthquakes. To solve this problem, the concept of using a zipper brace system was proposed in the literature. In the current study, the effect of using zipper braces on the seismic behavior of 3, 6, and 8 story steel buildings was examined under different ground motions. The case study buildings had the same plan and three bays having equal spans in each direction. For this, two dimensional model for each building was considered in the analysis. To improve the structural response of the existing structures under earthquake loading, single and double zipper braces were used. The nonlinear static and dynamic analysis was performed on the structures with and without zipper braces. In the dynamic analysis, 1994 Northridge, 1999 Hector Mine, and 1999 Chi-Chi earthquake records were employed. It was observed that the use of zipper braces over the frame height was found to have a significant effect on the seismic behavior of the structures. Moreover, the results of analysis showed that the steel structures with zipper braces had lower displacement and drift ratio than the existing ones.