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Predicted Fatigue Life Behavior of Stay Cables

by James M. Stallings, Auburn Univ, United States,
Karl H. Frank, Auburn Univ, United States,



Document Type: Proceeding Paper

Part of: Structural Materials

Abstract:

Monte Carlo simulation results are used to illustrate the relationship between the fatigue lives of short prestressing strand test specimens and long strand stay cables. Long stay cables are modeled as a system of parallel wires. The distribution of fatigue lives of the short wires is assumed to be log-normal with parameter values determined from strand fatigue test results. It is illustrated that the average cable life and the coefficient of variation of cable life decrease with increasing cable length. An increase in the number of strands in a cable results in a decrease in the coefficient of variation of cable life while the average cable life is not significantly affected.

Subject Headings: Cables | Cable stayed bridges | Fatigue tests | Monte Carlo method | Fatigue life | Bridge tests | Prestressing

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