Title:
Properties of Steel Fiber Reinforced Concrete Under Cyclic Load
Author(s):
Duane E. Otter and Antoine E. Naaman
Publication:
Materials Journal
Volume:
85
Issue:
4
Appears on pages(s):
254-261
Keywords:
compression; cyclic loads; fiber reinforced concretes; metal fibers; modulus of elasticity; strains; stress-strain relationships; toughness; Materials Research
DOI:
10.14359/2116
Date:
7/1/1988
Abstract:
An experimental investigation of the behavior of steel fiber reinforced concrete under cylindrical compressive loading is presented. Cylindrical specimens were cast using normal- and high-strength concrete mixes, four types of steel fiber, and three different volume fractions. Stress-strain responses were obtained for three cyclic loading regimes as well as for monotonic loading. The envelope curve is shown to govern cyclic response. Toughness under cyclic loading is found to be at least as great as that under monotonic loading. Analytical expressions are given for the decay in elastic modulus and the development of plastic strain as cyclic loading progresses. The behavior of fiber reinforced concrete under cyclic loading, when normalized by its monotonic behavior, is very similar to that of plain concrete or concrete confined by steel spirals, indicating that the fibers influence primarily the envelope curve.