DAMAGE ACCUMULATION IN CONCRETE WITH AND WITHOUT FIBER REINFORCEMENT

The paper reports the results of an experimental investigation whose objecteve was 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 underway at Columbia University to establsish 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 concrete residual strength and predicting its remaining life.