Seismic Behavior of Steel Off-Diagonal Bracing System (ODBS) Utilized in Reinforced Concrete Frame

Table 4

Sections characteristics and component properties of the six-story frame modeled for static and dynamic nonlinear analysis.

Components	Floor	Type	Dimensions; (𝑏×ℎ)	Bars and stirrups	Hinges	Acceptance criteria/type
Beams	First and second floors		Rectangular; 35×35 (cm)	4 Ø 18; Ø10 @ 10, 20 cm; (top and bottom)	Flexural; (M3)	0.01 rad; plastic rotation
	Third and fourth floors		Rectangular; 35×30 (cm)	4 Ø 16; Ø8 @ 10, 20 cm; (top and bottom)	Flexural; (M3)	0.01 rad; plastic rotation
	Fifth and sixth floors		Rectangular; 35×25 (cm)	3 Ø 16; Ø8 @ 10, 20 cm; (top and bottom)	Flexural; (M3)	0.01 rad; plastic rotation
Columns	First and second floors		Rectangular; 40×40 (cm)	12 Ø 20; Ø8 @ 8, 16 cm	Flexural + axial; (P-M3)	0.012 rad; plastic rotation
	Third and fourth floors		Rectangular; 35×35 (cm)	8 Ø 20; Ø8 @ 8, 16 cm	Flexural + axial; (P-M3)	0.012 rad; plastic rotation
	Fifth and sixth floors		Rectangular; 30×30 (cm)	8 Ø 18; Ø8 @ 10, 20 cm	Flexural + axial; (P-M3)	0.012 rad; plastic rotation
Braces	Second and third floors	X	Box 10×10×0.7 (cm)	—	Axial; (P)	7Δ𝑇; plastic deformation
	Fourth, fifth, and sixth floors		Box 8×8×0.5 (cm)	—	Axial; (P)	7Δ𝑇; plastic deformation
	First floor	ODBS	Components 1 and 2: Box 10×10×0.7 (cm)	—	Axial; (P)	7Δ𝑇; plastic deformation
			Component 3; Box 3×3×0.3 (cm)			9Δ𝑇; plastic deformation