A Conceptual Design Approach of Coupled Shear Walls

Table 11

Modified Parameters governing the coupling beam characteristics controlled by shear.

Type of coupling beam	Shear Span to Depth Ratio	𝐿𝑏/𝑑𝑏	Type of detailing	Plastic Rotation Capacity (Radians)
				Shear/𝑏𝑤𝑑𝑓^′𝑐	CP
Reinforced concrete coupling beam	𝜙≤2	No limit	Conventional longitudinal reinforcement with conforming transverse reinforcement	≤3	0.015
				≥6	0.010
		<1.5	Diagonal Reinforcement (strength is an overriding consideration and thickness of wall should be greater than 406.4 mm)	—	<0.03
		1.5 to 4.0	Truss Reinforcement (additional experimentation is required)	—	0.03–0.08
Steel coupling beam	𝑒≤1.6𝑀𝑝/𝑉𝑠𝑝		Shear dominant	—	0.15/𝐿𝑏