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Fatigue behaviour and damage accumulation in RAC subjected to cyclic compressive loadings
Highlights Fatigue performance is investigated in order to improve the state of knowledge on structural use of RAC. An algorithm for fatigue life estimation developed by the authors for NAC has been modified for application to RAC. A good agreement between experimental results found in the literature and theoretical prediction has been obtained. The proposed procedure and the identified parameters can be used to estimate the fatigue life of RAC. Fatigue strengths of RAC, even if smaller than that of NAC, still meet the provisions of fib Model Code.
Abstract In this paper a constitutive modelling developed by the authors for Natural Aggregate Concrete (NAC) is used to investigate the fatigue behaviour of Recycled Aggregate Concrete (RAC) subjected to compressive constant and variable amplitude stress cycles. The constitutive modelling takes into account the non-linear damage accumulation occurring in the material by using the stress-strain envelope concept. The identification of the parameters that define the constitutive modelling for RAC has been carried out through calibration with the available experimental data found in the literature. The present investigation allows to set up a predictive model that can be used to estimate the fatigue performance of RAC elements taking into account the compressive strength , the replacement percentage of coarse natural aggregates with recycled ones and the concrete mix type. Finally, a comparison between the fatigue experimental data and the provisions of the fib Model Code is carried out.
Fatigue behaviour and damage accumulation in RAC subjected to cyclic compressive loadings
Highlights Fatigue performance is investigated in order to improve the state of knowledge on structural use of RAC. An algorithm for fatigue life estimation developed by the authors for NAC has been modified for application to RAC. A good agreement between experimental results found in the literature and theoretical prediction has been obtained. The proposed procedure and the identified parameters can be used to estimate the fatigue life of RAC. Fatigue strengths of RAC, even if smaller than that of NAC, still meet the provisions of fib Model Code.
Abstract In this paper a constitutive modelling developed by the authors for Natural Aggregate Concrete (NAC) is used to investigate the fatigue behaviour of Recycled Aggregate Concrete (RAC) subjected to compressive constant and variable amplitude stress cycles. The constitutive modelling takes into account the non-linear damage accumulation occurring in the material by using the stress-strain envelope concept. The identification of the parameters that define the constitutive modelling for RAC has been carried out through calibration with the available experimental data found in the literature. The present investigation allows to set up a predictive model that can be used to estimate the fatigue performance of RAC elements taking into account the compressive strength , the replacement percentage of coarse natural aggregates with recycled ones and the concrete mix type. Finally, a comparison between the fatigue experimental data and the provisions of the fib Model Code is carried out.
Fatigue behaviour and damage accumulation in RAC subjected to cyclic compressive loadings
Breccolotti, Marco (author) / Bonfigli, Massimo Federico (author)
2020-07-28
Article (Journal)
Electronic Resource
English
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