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 -