Journal of Structures / 2014 / Article / Tab 6 / Research Article
Seismic Behavior of Steel Off-Diagonal Bracing System (ODBS) Utilized in Reinforced Concrete Frame Table 6 The values of maximum relative drifts of floors obtained for two-, six-, and fifteen-story frames of flexural type, strengthened with X-bracing system type and strengthened with off-diagonal bracing system type undergoing the earthquakes of Naghan, Tabas, and El Centro (from left to right).
(a) Floor (Interstory drift) (cm) (Naghan/Tabas/El Centro) X-bracing system 2-ST 6-ST 15-ST 1 0.25 0.16 0.21 0.62 0.6 1.4 0.95 0.6 0.8 2 0.1 0.09 0.12 0.7 0.83 1.71 0.9 0.45 0.4 3 0.8 1.15 1.93 0.75 0.39 1.00 4 1.45 2.41 1.68 1.47 0.51 1.1 5 0.72 1.52 0.79 1.68 1.41 2.1 6 0.51 0.89 0.46 1.93 1.50
2.6 7 0.76 0.95 3.01 8 0.93 2.1 1.76 9 0.81 2.05 2.51 10 0.75 2.5 1.12 11 0.6 1.63 0.93 12 0.72 0.95 0.81 13 0.58 0.71 0.6 14 0.49 0.45 0.48 15 0.33 0.2 0.23
(b) Floor (Interstory drift) (cm) (Naghan/Tabas/El Centro) Off-diagonal bracing system 2-story 6-story 15-story 1 0.4 0.28 0.35 2.75 1.9 2.6 5.1 3.1 4.93 2 0.24 0.12 0.2 1.76 1.24 2.1 1.9 2.03 3.1 3 0.85 0.43 0.6 1.71 1.47 2.08 4 1.46 1.05 1.4 1.63 1.2 1.43 5 0.77 0.52 0.7 1.04 0.98 1.76 6 0.68 0.3 0.5 0.98 0.8 1.45 7 1.45 0.77 2.5 8 2.53 0.63 0.23 9 0.8 1.51 0.2 10 0.71 2.33 1.49 11 0.7 1.51 0.7 12 0.62 1.06 0.32 13 0.41 0.43 0.11 14 0.28 0.41 0.1 15 0.14 0.32 0.06
(c) Floor (Interstory drift) (cm) (Naghan/Tabas/El Centro) (flexural) 2-story 6-story 15-story 1 0.3 0.2 0.27 2.95 1.68 2.93 1.4 0.07 0.9 2 0.18 0.1 0.19 1.05 1.98 2.85 3.1 0.51 1.8 3 2.48 1.85 2.33 2.4 1.7 1.93 4 1.49 1.08 1.45 2.1 0.61 3.91 5 1.2 0.9 1.21 1.9 0.53 2.85 6 0.8 0.58 0.86 1.85 0.42 2.7 7 1.61 0.43 2.53 8 1.42 0.94 1.98 9 1.23 0.83 1.45 10 1.2 0.9 2.9 11 2.31 3.4 1.95 12 1.86 1.95 1.43 13 1.03 1.08 1.32 14 0.68 0.81 1.11 15 0.34 0.71 0.95
