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Shear strength of reinforced high-strength concrete beams
In the past decade there has been a rapid growth of interest in high-strength concrete with compressive strength Fc higher than 50 MPa. However, provisions for shear design rely mainly on experimentally derived equations based on members with concrete strength mostly below 40 MPa. Moreover, shear failure surfaces in highstrength concrete members are smoother than in normal-strength concrete members, with cracks propagating through coarse aggregate particles rather than around them. Since one of the shear transfer mechanisms across cracks is by aggregate interlock, this mechanism needs to be re-examined for high-strength concrete. An extensive study has been carried out in order to adapt the current design rules to HSC. It is proposed a new shear design method based on a review of current models, an experimental investigation on high strength concrete beams, and the application of artificial neural networks (ANN) to analyse more than 200 empirical results existing in the literature. It is concluded that the new shear design method predicts satisfactorily the failure shear strength for normal and high-strength concrete beams.
Shear strength of reinforced high-strength concrete beams
In the past decade there has been a rapid growth of interest in high-strength concrete with compressive strength Fc higher than 50 MPa. However, provisions for shear design rely mainly on experimentally derived equations based on members with concrete strength mostly below 40 MPa. Moreover, shear failure surfaces in highstrength concrete members are smoother than in normal-strength concrete members, with cracks propagating through coarse aggregate particles rather than around them. Since one of the shear transfer mechanisms across cracks is by aggregate interlock, this mechanism needs to be re-examined for high-strength concrete. An extensive study has been carried out in order to adapt the current design rules to HSC. It is proposed a new shear design method based on a review of current models, an experimental investigation on high strength concrete beams, and the application of artificial neural networks (ANN) to analyse more than 200 empirical results existing in the literature. It is concluded that the new shear design method predicts satisfactorily the failure shear strength for normal and high-strength concrete beams.
Shear strength of reinforced high-strength concrete beams
Scherfestigkeit von verstärkten hochfesten Betonbalken
Cladera, A. (author) / Mari, A.R. (author)
2002
15 Seiten, 5 Bilder, 4 Tabellen, 36 Quellen
Conference paper
English
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