Evaluating the Performance of the Buckling Restrained Braces in Tall Buildings with peripherally braced frames

Document Type: Regular Paper

Authors

1 Department of Civil Engineering, Payame Noor University, Tehran, Iran

2 2. M.Sc. graduated student of Structural Engineering, Department of Civil Engineering, Payame Noor University, Tehran, Iran

Abstract

In recent years, seismic design of structures has been undergoing significant changes due to increasing demand for optimization and minimizing the level of damage and reducing the cost of structural repairs. Development of analytical methods and remarkable improvements of computer performance have been among the factors which influenced the design of structures. A lot of research has been conducted on the development of braces with perfect elastoplastic behaviour. The invention and development of the buckling restrained braces have been the results of these researches. In this study, the performance of the Buckling Restrained Environmental Braces (BRB) in high-rise buildings were evaluated using nonlinear time-history dynamics analysis with three pairs of acceleration and compared with the conventional concentrically braced frame (CBF). The studied structures are 20, 40, and 60 stories building in which braces were utilized peripherally. The obtained results illustrate that the use of Buckling Restrained Brace Frames (BRB) instead of conventional braces frame (CBF) in high-rise steel buildings improves hysteresis behavior of the braces and reduces lateral displacements and also increase the capacity of base shear.

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