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۱Seismic Assessment and comparison of Buckling Restrained Braced Frames
نویسنده(ها): ،
اطلاعات انتشار: چهارمین کنگره ملی مهندسی عمران، سال
تعداد صفحات: ۸
Disadvantages of seismic behavior of common braces such as lack of ductility, buckling and energy dissipation and also unsymmetrical hysteresis performance in tension and compression induced researchers to suggest new generation of braces that are buckling restrained braces and yielding damped braces. The focus of this paper is on the seismic response of three and six story concentrically braced frames utilizing buckling–restrained braces. In this research it is tried to assess seismic behavior and failure causes of these braces through nonlinear push over analyses. Finally Response modification Factor of these braces obtained from this study according to NEHRP are compared by Reduction factor of similar systems in UBC code.<\div>

۲Impact of Number of Stories on Seismic Behavior of Yielding Damped Braced Frames
نویسنده(ها): ،
اطلاعات انتشار: چهارمین کنگره ملی مهندسی عمران، سال
تعداد صفحات: ۸
Concentric braces in braced frames are practical and economical choices to create lateral resistance for steel buildings but they are not usually ductile. Yielding damped braces have been proposed as one of new generations of ductile braces. According to past studies, Response modification Factor for a one degree of freedom frame with this brace is 8. In this paper, it is tried to investigate the seismic behavior of these braced, frames evaluating the effect of an increase in number of stories. For this purpose, first demandcapacity curve is determined by push over analysis and then Response modification Factor of these yielding damped braced frames is numerically investigated in UBC code building ranges.<\div>
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