Title:
Low-Cycle Fatigue of Plain and Fiber-Reinforced Concrete
Author(s):
Todorka Paskova and Christian Meyer
Publication:
Materials Journal
Volume:
94
Issue:
4
Appears on pages(s):
273-286
Keywords:
compression; compressive strength; cyclic load; damage; fatigue;
energy dissipation capacity; fatigue strength; fiber-reinforced concrete;
plain concrete; uniaxial load;
DOI:
10.14359/309
Date:
7/1/1997
Abstract:
Results of an experimental investigation of the behavior of plain concrete and steel and polypropylene fiber-reinforced concrete under cyclic compressive loading are presented. The parameters of the study were: fiber type, fiber volume, concrete strength, and the stress-to-strength ratio. The tests were conducted under load control. The main emphasis was placed on the fatigue life, Nf, energy absorption characteristics and damage accumulation. Also, the effect of the various parameters on the deformational characteristics (load-deformation histories, strain accumulation and tangent modulus) was studied. The fatigue behavior of plain concrete was found to improve with concrete strength. Fibers up to 1 percent have considerable beneficial effect on the fatigue behavior of concrete. However, beyond N/Nf = 0.8, their effectiveness tends to decrease. At lower stress levels fibers dissipate much more additional energy than at higher stress levels. For volumes up to 1 percent steel fibers are up to two times as effective as polypropylene fibers. The beneficial effect of polypropylene fibers increases at lower stress levels. ¯