Shear friction capacity of self-consolidating concrete

Abstract An experimental research was developed to evaluate shear transfer in self-consolidating. Three concrete mixes were prepared, one conventional and two self-consolidating, differing on the proportion of the coarse and fine aggregate used. Nine push-off specimens, containing steel reinforcemen...

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Published inRevista IBRACON de estruturas e materiais Vol. 14; no. 1
Main Authors Savaris, Gustavo, Pinto, Roberto Caldas de Andrade
Format Journal Article
LanguageEnglish
Published IBRACON - Instituto Brasileiro do Concreto 2021
Instituto Brasileiro do Concreto (IBRACON)
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Summary:Abstract An experimental research was developed to evaluate shear transfer in self-consolidating. Three concrete mixes were prepared, one conventional and two self-consolidating, differing on the proportion of the coarse and fine aggregate used. Nine push-off specimens, containing steel reinforcement passing through the shear plane, were tested, to evaluate the ultimate shear stress and shear plane displacements. Shear strength of self-consolidating concrete specimens were higher than conventionally vibrated concrete. The experimental results were compared to the shear strength estimated by literature and code based equations, yielding conservative results of these equations for both types of concrete, especially the models that disregard the compressive strength of concretes. Resumo Um programa experimental foi desenvolvido para avaliar o atrito cisalhamento no concreto autoadensável. Três misturas de concreto foram preparadas, uma convencional e duas autoadensáveis, diferenciadas pela proporção de agregados miúdo e graúdo utilizada. Nove exemplares para ensaios do tipo push-off, contendo armadura transversal ao plano de cisalhamento, foram ensaiados para avaliar a tensão cisalhante última e os deslocamentos do plano de cisalhamento. A resistência ao cisalhamento do concreto autoadensável foi superior aos de concreto convencionalmente vibrado. Os resultados experimentais foram comparados com estimativas calculadas com equações da literatura e de normas de dimensionamento, demonstrando estas equações serem conservadoras para os dois tipos de concreto, especialmente em modelos que desconsideram a resistência à compressão do concreto.
ISSN:1983-4195
1983-4195
DOI:10.1590/s1983-41952021000100002