Seismic study of cable-cylinder bracing under near field records

Recently, the researchers have growingly focused on the cable bracing systems, among which new cable-cylinder bracing can decrease the drift and increase the ductility of structures, comparing to cross-cable bracing. Directivity pulse and fling-step are of exclusive specifications of near filed records. For the first time, overstrength factor, ductility factor and response modification factor of cable-cylinder bracing system are computed by two-dimensional model, in this research. Accordingly, the cable-cylinder bracing system is subjected to 10 near filed earthquake records for conducting incremental dynamic analyses. Moreover, the values of response modification factor are calculated and compared for moment frames with cross-cable bracing and cable-cylinder bracing. Based on the results, cable-cylinder bracing works better than cable bracing, regarding its higher response modification factor, in comparison with that of cross-cable bracing

Keywords:

cable-cylinder bracing , near field records , incremental dynamic analysis , response modification factor , overstrength factor