Acceptable Elongations and Low-Cycle Fatigue Performance for High-Strength Reinforcing Bars

Research purpose

This project will define acceptable uniform elongations and low-cycle fatigue performance for high-strength reinforcing bars (HSRB) in concrete construction based on bar properties and seismic hazard level. HSRB are defined as bars having a yield strength of 80 ksi or higher. This project will identify key parameters affecting the fatigue performance of HSRB and deliver specification limits that will ensure minimum performance is achieved in production of HSRB.

University of Texas at San Antonio
Project Area
Structural Engineering
CPF research grant #
Award amount
Grant period
Aug 2016 - Oct 2018
Grant Status
In Progress
Principal Investigator
Wassim M. Ghannoum, Ph.D., P.E., F.SEI
Industry champions

Dominic Kelly, Simpson Gumpertz and Heger, Inc., Boston
Andrew Taylor, KPFF, Seattle
Conrad Paulson, WJE, Los Angeles
Loring Wyllie, Degenkolb, San Francisco

CPF allies
Research deliverables

Interim Strain Demand Report and Interim Low-Cycle Fatigue Report
Draft Final Report
Final Report