Prediction of flexural fatigue life and failure probability of normal weight concrete

K.M.A.  Sohel; M.H.S.  Al-Hinai; A.  Alnuaimi; M.  Al-Shahri; S.  El-Gamal

doi:10.3989/mc.2022.03521

Autores/as

K.M.A. Sohel Department of Civil and Architectural Engineering, Sultan Qaboos University https://orcid.org/0000-0003-1144-614X
M.H.S. Al-Hinai Department of Civil and Architectural Engineering, Sultan Qaboos University https://orcid.org/0000-0003-3009-459X
A. Alnuaimi Department of Civil and Architectural Engineering, Sultan Qaboos University https://orcid.org/0000-0002-9515-4250
M. Al-Shahri Department of Civil and Architectural Engineering, Sultan Qaboos University https://orcid.org/0000-0001-7807-2723
S. El-Gamal Department of Civil and Architectural Engineering, Sultan Qaboos University https://orcid.org/0000-0002-0381-032X

DOI:

https://doi.org/10.3989/mc.2022.03521

Palabras clave:

Hormigón, Fatiga, Resistencia a flexión, Durabilidad, Propiedades mecánicas

Resumen

La vida a fatiga debe ser considerada en el diseño de muchas estructuras de hormigón bajo varios niveles de tensión y relaciones de tensión. Muchos resultados de pruebas de fatiga por flexión del hormigón convencional (densidad normal) están disponibles en la literatura y casi todos proporcionan diferentes ecuaciones de fatiga. Sin embargo, es necesario tener una ecuación de fatiga común para predecir la vida a fatiga de diseño de las estructuras de hormigón bajo carga de flexión con una precisión razonable. Por lo tanto, se creó una base de datos de resultados de ensayos de fatiga por flexión para hormigón con resistencias que oscilan entre 25 y 65 MPa; esta base de datos se utilizó para generar nuevas ecuaciones de fatiga (ecuación de fatiga de Wöhler y relación de potencia S-N) para predecir la vida a fatiga por flexión del hormigón de densidad normal. El concepto de vida a fatiga equivalente se introdujo para obtener una ecuación de fatiga utilizando la misma relación de tensión. También se llevó a cabo un análisis probabilístico para desarrollar ecuaciones de fatiga por flexión que incorporen probabilidades de falla.

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