Modelo fenomenológico para el análisis y predicción de la evolución de daño en hormigón en masa y con fibras bajo fatiga en compresión
- S. Blasón 1
- A. Fernández Canteli 2
- G. Ruiz 3
- E. Poveda 3
- R.C. Yu 3
- E. Castillo 4
- 1 Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Alemania
- 2 Dpto. Construcción e Ingeniería de Fabricación, Universidad de Oviedo, España
- 3 Dpto. de Mecánica Aplicada e Ingeniería de Proyectos, Universidad de Castilla La Mancha, España
- 4 Real Academia de Ingeniería y Real Academia de Ciencias de España
ISSN: 2792-4246
Ano de publicación: 2022
Número: 3
Páxinas: 107-112
Tipo: Artigo
Outras publicacións en: Revista española de mecánica de la fractura
Resumo
The total strain in plain and fiber-reinforced concrete under compressive constant fatigue load is modelled and predicted using a phenomenological approach. Two different scenarios are considered for the assessment of the damage process under cyclic creep. The first one, refers to the stochastic cumulative damage evolution represented by a sample function as the total strain in terms of the number of cycles normalized to the failure one. The second one, concerns the variability of the fatigue lifetimes for a prefixed fatigue strain value, which is considered the ultimate limit state. The normalized sample function is identified as a cumulative distribution function (cdf) of the generalized extreme value (GEV) family, in this case justified as the Weibull distribution. The proposal includes the probabilistic lifetime prediction under compression fatigue as well as the expectation of the remaining evolution of the ε-N curve up to failure when the test is prematurely interrupted. In this way, a notable reduction of the test duration and cost of the experimental program is attainable without impairment of the data reliability.