Title: Damage accumulation in concrete with and without fiber reinforcement

Author(s): Miroslaw Grzybowski and Christian Meyer

Publication: Materials Journal

Volume: 90

Issue: 6

Appears on pages(s): 594-604

Keywords: damage; energy; fatigue (materials); reinforced concrete; Materials Research

DOI: 10.14359/4438

Date: 11/1/1993

Abstract:
Although concrete is known to deteriorate both in strength and stiffness when subjected to large numbers of load applications, especially when stress reversals are involved, relatively little is known about its fatigue behavior and specifically damage accumulation in the low-cycle fatigue range. Herein, the results of an experimental investigation are reported, which had the objective of measuring the energy-dissipation capacity of concrete with and without fiber reinforcement under uniaxial stress cycles. This test program is the first phase of a major investigation currently underway at Columbia University to establish a data base that can be used to develop damage prediction tools and facilitate low-cycle fatigue analysis of concrete and concrete members subjected to arbitrary load histories. A new energy-based damage index is proposed, which is well suited for quantifying the concrete's residual strength and predicting its remaining life.