Title:
Flexural Fatigue Life Distributions and Failure Probability of Steel Fibrous Concrete
Author(s):
S. P. Singh and S. K. Kaushik
Publication:
Materials Journal
Volume:
97
Issue:
6
Appears on pages(s):
658-667
Keywords:
fatigue; fiber-reinforced concrete; steel.
DOI:
10.14359/9979
Date:
11/1/2000
Abstract:
This paper investigates the fatigue life distributions of steel fiber-reinforced concrete (SFRC) containing different volume fractions of steel fibers for various levels of the applied fatigue stress. An extensive experimental investigation was planned in which 143 flexural fatigue tests and 115 complimentary static flexural tests were conducted on SFRC specimens 100 x 100 x 500 mm in size and containing corrugated steel fibers 30 x 2.0 x 0.6 mm in size in three different volume fractions; that is, 0.5, 1.0, and 1.5%. It has been observed that the probabilistic distribution of fatigue life of SFRC, at a particular stress level S, can be approximately modeled by the two-parameter Weibull distribution with statistical correlation coefficient values exceeding 0.90. The shapes of the Weibull distribution for fatigue life of SFRC are different for different levels of the applied fatigue stress. The graphical method, the method of moments, and method of maximum likelihood estimates have been used to obtain the distribution parameters of the Weibull distribution. The two-parameter Weibull distribution has been employed to incorporate failure probability into the S-N relationships of SFRC.