Deducción de las curvas de Wöhler de corrosión-fatiga de los aceros de pretensado a partir de la medida de la velocidad de crecimiento de fisuras
Autor(en): |
A. Martín Sanz
J. Llorca Martínez V. Sánchez-Gálvez |
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Medium: | Fachartikel |
Sprache(n): | Englisch, Spanisch |
Veröffentlicht in: | Hormigón y acero, 3. Quartal 1990, n. 176, v. 41 |
Seite(n): | 25-30 |
Abstrakt: |
Prediction of the corrosion-fatigue Wöhler curves of prestressing steel from crack growth rate measurementsCorrosion-fatigue Wöhler's curves obtention of prestressing steels by direct experimental measurements requires a high number of long duration tests, thus being an impractical approach. Therefore, a new mwthod for deriving corrosion-fatigue Wöhler's curves by numerical integration of crack growth rate data in prestressing steels was envisaged. Llorca and Sánchez-Gálvez method was used for numerical integration of ecperimental crack growth rates to derive the number cycles to rupure as a function of stress range. Wöhler's curve obtained a show good agreement with experimental results of corrosion-fatigue tests on smooth samples and can be used for fatigue calculation of prestressed structures subjected to cyclic loading in agressive envoironments. |
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