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Fibres as Replacement of Horizontal Ties in Compressed Reinforced Concrete Elements: Experimental Study
Version 1
: Received: 27 June 2022 / Approved: 28 June 2022 / Online: 28 June 2022 (09:59:27 CEST)
A peer-reviewed article of this Preprint also exists.
Skadiņš, U. Fibres as Replacement of Horizontal Ties in Compressed Reinforced Concrete Elements: Experimental Study. Fibers 2022, 10, 68. Skadiņš, U. Fibres as Replacement of Horizontal Ties in Compressed Reinforced Concrete Elements: Experimental Study. Fibers 2022, 10, 68.
Abstract
Steel fibres provides ductility to concrete structures. This in turn gives possibility to replace or reduce conventional reinforcement in structural elements. In this study the focus is on structural walls and the fibres as potential replacement for horizontal reinforcement in areas where vertical re-bars are needed. An experimental study was conducted, in which prismatic specimens with longitudinal re-bars were subjected to centric loading. Ten samples with 12 specimens in each were tested. The parameters considered were: fibre content, concrete cover for the longitudinal bars, and presence of stirrups. Self-compacting concrete with 30 and 60 kg/m3 steel fibres was used. The influence of fibres on maximum load, stiffness, and ductility of the specimens is evaluated. The results show that fibres eliminated brittle collapse and spalling of concrete at failure. Samples with fibres tend to have reduced maximum force and stiffness but increased ductility. The specimens with fibre content of 60 kg/m3 showed more ductile behaviour than the ones with minimum amount of conventional stirrups. The study suggests that combination of steel fibres and conventional re-bars can lead to less qualitative compactness of the self-compacting concrete, which in turn may reduce load bearing capacity and stiffness of the structure.
Keywords
steel fibres; stirrups; concrete walls; self-compacting concrete; buckling of re-bars
Subject
Engineering, Civil Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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