Open access
Date
2020Type
- Conference Paper
Abstract
The shear transfer capacity of concrete across cracks is highly relevant in situations where the principal concrete stress directions are not aligned with the cracks. Fibres are effective in controlling the crack opening, thereby enhancing aggregate interlock and hence, the ability of transferring shear stresses across cracks. Compared to plain concrete, higher stresses can therefore be transferred across cracks in fibre reinforced concrete (FRC). However, the shear transfer across cracks in FRC has received much less attention over the past decades than the residual tensile stress transfer across orthogonally opening cracks, and no generally accepted model for this behaviour is available today. The shear transfer capacity and the calibration of most existing models are obtained from experimental tests which presume failures occurring in “pure shear”, being the most popular used test setups: (i) Z-type push-off specimen; (ii) modified JSCE-G 553; and (iii) FIP shear test method (asymmetrical four-point bending). However, significant differenced have been observed in the experimental resulting shear strength, depending on the test setup. These differences have not been evaluated systematically until now. In order to address this issue, the authors carried out an experimental campaign on specimens made from identical SFRC mixes with varying fibre dosage, testing each mix in all three mentioned setups. The paper presents the results of this experimental campaign. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000453091Publication status
publishedExternal links
Book title
Fibre Reinforced Concrete: Improvements and Innovations, RILEM-fib International Symposium on FRC (BEFIB) in 2020Journal / series
RILEM BookseriesVolume
Pages / Article No.
Publisher
SpringerEvent
Subject
Steel fibre reinforced concrete; Shear test setup; Push-off test; JSCE shear test; FIP shear test; Experimental testing; Shear transfer; Interface shear; Cracks; Crack kinematics; Aggregate interlockOrganisational unit
09469 - Kaufmann, Walter / Kaufmann, Walter
Notes
Due to the Coronavirus (COVID-19) the conference was conducted virtually.More
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