FEMA P695 Study - "Enhanced Ductility" RC Coupled Wall Systems

FEMA P695 Study - "Enhanced Ductility" RC Coupled Wall Systems

The proposed study will examine the application of the FEMA P695 Methodology to ED-RCCW buildings less than 240 ft. in height to determine appropriate values of R, C_d, and Ω₀; for buildings greater than 240 ft. tall, ASCE 7 requires a dual system. The study will follow the same general approach as used for the trial studies outlined in NIST (2010) for RC shear wall buildings as summarized by Gogus and Wallace (2015). A single configuration, with two cantilever walls coupled by a single "column" of coupling beams over the building height will be considered to illustrate findings for a range of building heights and design parameters. Important design variables are anticipated to be coupling beam aspect ratio (ln/h) and strength (Vn), and wall cross section geometry, i.e., planar wall versus flanged wall cross section. The expectation is that trial values of R, C_d, and Ω₀ will be selected, and the objective of either confirming these values or iterating to refine these values. Iteration may be limited to a subset of the initial study.

• Grant Details

  Project

  FEMA P695 Study - "Enhanced Ductility" RC Coupled Wall Systems

  Grantee

  University of California, Los Angeles

  Category

  Performance-Based Design

  Subcategory

  Seismic

  Grant #

  06-17

  Award Amount

  $85,000

  Grant Period

  July 2017 - October 2018

  Grant Status

  Complete

  Principal Investigators

  Professor John W. Wallace - UCLA - Wallacej@UCLA.edu; Co PI - Kristijan Kolozvari, California State University Fullerton - kkolozvari@exchange.fullerton.edu

  Industry Champions

  James Harris, S.K. Ghosh, Laura Lowes, Ron Klemencic, David Fields

  CPF Allies

  American Concrete Institute (ACI), American Society of Civil Engineers (ASCE)

• Resources / Downloads

  • Ductile Reinforced Concrete Coupled Walls: FEMA P695 Study - Final Report, 2019

• Related Research

  • 07-18 Comprehensive Revision of Design Considerations for Column Base Connections in Steel Moment Frames
  • 06-16 Seismic and Wind Behavior and Design of Coupled CF-CPSW Core Walls for Steel Buildings
  • 02-16 Low-Cycle Fatigue Criteria for the Seismic Design of Concrete Structures with High Strength Reinforcing Steel
  • 02-14 Linking Concrete Tensile Performance and Seismic Response of Fiber Reinforced Concrete Coupling Beam
  • 01-16 Update To Performance-Based Seismic Design Guidelines for Tall Buildings
  • 07-11 Effect of Shear Stud Layout on the Seismic Behavior of Slab-Column Connections
  • 02-11 Precast Concrete Cladding Subsystems - Detailing for Regions of High Seismicity
  • 03-10 Post-Tensioned Cast-in-Place Concrete Walls for Seismic Resistance
  • 02-10 Beam Hoop Reinforcement for Large Beams in Special Moment Resisting Frames
  • 03-09 Performance-Based Seismic Design of Concrete Walls
  • 03-08 Hybrid Precast Wall Systems for Seismic Regions
  • 08-07 Development and Design of Untopped Precast Concrete Diaphragm Systems for High Seismic Zones (Extension)
  • 03-07 Guidelines to Performance-Based Seismic Design of Tall Buildings
  • 11-06 Design Procedure for Thin Shear Walls in High Seismic Zones
  • 02-06 Development and Design of Untopped Precast Concrete Diaphragm Systems for High Seismic Zones