FATIGUE-LIFE DISTRIBUTIONS OF CONCRETE FOR VARIOUS STRESS LEVELS

The paper presents a study of fatigue-life distributions of concrete for various levels of applied stresses. An experiment was conducted to obtain the fatigue lives of concrete at various given stress levels. The concrete beam specimens were tested under 4-point flexural loading. Three different levels of applied fatigue stresses were considered. The present study indicates that the probabilistic distributions of fatigue life of concrete depend on the level of applied fatigue stress. The shapes of the Weibull distribution to describe the fatigue life of concrete differ for various levels of applied stresses. This effect must be taken into account in realistic fatigue reliablity analysis to secure adequate fatigue resistance of concrete structures. The graphnical method, the method of moment, and the method of maximum likelihood estimation are shown to yield very similar values of distribution parameters for the present fatigue data. The shape parameter of the Weibull distribution for the fatigue life of concrete ranges from 2.0 to 4.0, depending on the level of applied fatigue stress.

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00607446
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 30 1991 12:00AM