TY - GEN
T1 - Shear capacity of steel fibre reinforced concrete beams
AU - Abad, Belkis Filian
AU - Lantsoght, Eva O.L.
AU - Yang, Yuguang
N1 - Publisher Copyright:
© fédération internationale du béton (fib). This document may not be copied or distributed without prior permission from fib.
PY - 2019
Y1 - 2019
N2 - The Critical Shear Displacement Theory (CSDT) was developed to determine the shear capacity of reinforced concrete beams based on the different shear-carrying mechanisms (concrete in the compression zone, aggregate interlock, and dowel action). This research aims at extending the CSDT to Steel Fibre Reinforced Concrete (SFRC) by adding the contribution of steel fibres. The model extension was developed based on formulations for the contribution of steel fibres to the shear capacity from the literature. With this extension to the CSDT, the shear strength of steel fibre reinforced concrete beams without stirrups could be estimated. An extensive database is developed from the literature in order to evaluate, compare, and analyse the shear capacity of SFRC beams. The analysis indicates that two models are capable of predicting the shear strength of SFRC beams with reasonable accuracy. The mean, standard deviation, and coefficient of variation are 0.9, 0.28, 0.31 and 1.1, 0.33 and 0.30 respectively. The main geometric variables of the steel fibres that influenced the shear strength are the length, diameter, and fibre type (hooked, crimped, and straight). From the comparison between the results in the database and the proposed extensions to the CSDT it is found that the critical shear displacement of Acr = 0.025 mm, gives reasonable results for SFRC. As such, this proposed method can be used to estimate the shear strength of SDRC based on a mechanical model.
AB - The Critical Shear Displacement Theory (CSDT) was developed to determine the shear capacity of reinforced concrete beams based on the different shear-carrying mechanisms (concrete in the compression zone, aggregate interlock, and dowel action). This research aims at extending the CSDT to Steel Fibre Reinforced Concrete (SFRC) by adding the contribution of steel fibres. The model extension was developed based on formulations for the contribution of steel fibres to the shear capacity from the literature. With this extension to the CSDT, the shear strength of steel fibre reinforced concrete beams without stirrups could be estimated. An extensive database is developed from the literature in order to evaluate, compare, and analyse the shear capacity of SFRC beams. The analysis indicates that two models are capable of predicting the shear strength of SFRC beams with reasonable accuracy. The mean, standard deviation, and coefficient of variation are 0.9, 0.28, 0.31 and 1.1, 0.33 and 0.30 respectively. The main geometric variables of the steel fibres that influenced the shear strength are the length, diameter, and fibre type (hooked, crimped, and straight). From the comparison between the results in the database and the proposed extensions to the CSDT it is found that the critical shear displacement of Acr = 0.025 mm, gives reasonable results for SFRC. As such, this proposed method can be used to estimate the shear strength of SDRC based on a mechanical model.
KW - Beam
KW - Critical shear displacement
KW - Database
KW - Shear
KW - Steel fibre reinforced concrete
UR - http://www.scopus.com/inward/record.url?scp=85134827986&partnerID=8YFLogxK
M3 - Contribución a la conferencia
AN - SCOPUS:85134827986
SN - 9782940643004
T3 - fib Symposium
SP - 1710
EP - 1717
BT - Concrete Innovations in Materials, Design and Structures - Proceedings of the fib Symposium, 2019
A2 - Derkowski, Wit
A2 - Gwozdziewicz, Piotr
A2 - Hojdys, Lukasz
A2 - Krajewski, Piotr
A2 - Pantak, Marek
PB - fib. The International Federation for Structural Concrete
T2 - International fib Symposium on Concrete Innovations in Materials, Design and Structures, 2019
Y2 - 27 May 2019 through 29 May 2019
ER -