E – 2092 Design of RC Ductile Coupled Shear Wall System According to ACI 318-19 and ASCE/SEI 7-22 Codes

The objective of this course is to assist a licensed design professional, practicing structural engineers, forensic structural engineers, consulting engineers, building officials,  educators, students and/or a licensed general contractor to deeply know, and understand the seismic analysis, and design of  RC  ductile coupled shear wall system according to ACI 318-19 and ASCE/SEI 7-22 Codes.  The importance of this course also lies in the fact that the new current version of ASCE/SEI 7-22 code   describes this system as a distinct seismic force-resisting system compared to others ones. Thus, the discussion in this course focuses not on just coupled walls but ductile coupled walls consisting of ductile shear walls and ductile coupling beams.  Unfortunately, there are not a sufficient number of references dealing with this topic, so the course was designed to be an important guide for the structural engineers those working in this field.

A ductile coupled wall system of reinforced concrete is now defined in ACI 318-19 (ACI, 2019), and it is recognized as a distinct seismic force-resisting systems in ASCE/SEI 7-22 Table 12.2-1, Design
Coefficients and Factors for Seismic Force-Resisting Systems. Three line items have been added to
the table, featuring the ductile coupled wall system of reinforced concrete. The line items are under:
A. Bearing Wall Systems, B. Building Frame Systems, and D. Dual Systems with Special Moment
Frames. R = 8, Cd = 8, and Ω0 = 2.5 are the design coefficients in all the line items. The height limits
are the same as for corresponding uncoupled isolated wall systems. Several important changes
made in ACI 318-19 for the design and detailing of special structural walls were implemented in the
design of prototypes for the FEMA P695 study supporting the above values.