R-Factors for Coupled Composite Plate Shear Walls–Concrete Filled (Coupled-C-PSW/CF)

Research purpose

This project seeks R-Factors developed from FEMA P-695 studies for Coupled Composite Plate Shear Walls – Concrete Filled (Coupled-C-PSW/CF), for inclusion in ASCE-7, higher than R-factors for corresponding non-coupled walls. C-PSW/CFs is foreseen to become an efficient option for the lateral force resisting system of buildings when relatively large seismic demands lead to the design of concrete shear walls with dense reinforcement and large thickness, or steel plate shear walls with relatively thick web plates and large boundary elements. This system will be predominantly used in high-rise buildings having a core-wall system with coupled beams. Coupled systems are anticipated to be more ductile and have more redundancy, but ASCE currently does not assign them higher R-factors. This study uses the FEMA P-695 methodology to substantiate the R-factors for such Coupled-C-PSW/CF structures.

University at Buffalo (SUNY)
Project Area
Structural Engineering
CPF research grant #
Award amount
Grant period
Jan 2017 - Jun 2018
Grant Status
In Progress
Principal Investigator
Michel Bruneau; Co-PI Amit Varma, Purdue University
Industry champions

John Hooper, Magnusson Klemencic Associates
Jim Malley, Degenkolb Engineers
Rafael Sabelli, Walter P. Moore & 
Tom Sabol, Englekirk Institutional
Larry Kruth, AISC
Bonnie Manley, American 
Iron and Steel Institute

CPF allies
Research deliverables

Interim Report
Final Report