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Structural Engineering and Mechanics
  Volume 65, Number 3, February10 2018 , pages 223-231
DOI: https://doi.org/10.12989/sem.2018.65.3.223
 


Numerical investigation on the structural behavior of two-way slabs reinforced with low ductility steel
Zafer Sakka and R. Ian Gilbert

 
Abstract
    A numerical investigation of the impact of steel ductility on the strength and ductility of two-way corner and edge-supported concrete slabs containing low ductility welded wire fabric is presented. A finite element model was developed for the investigation and the results of a series of concurrent laboratory experiments were used to validate the numerical solution. A parametric investigation was conducted using the numerical model to investigate the various factors that influence the structural behavior at the strength limit state. Different values of steel uniform elongation and ultimate to yield strength ratios were considered. The results are presented and evaluated, with emphasis on the strength, ductility, and failure mode of the slabs. It was found that the ductility of the flexural reinforcement has a significant impact on the ultimate load behavior of two-way corner-supported slabs, particularly when the reinforcement was in the form of cold drawn welded wire fabric. However, the impact of the low ductility WWF has showed to be less prominent in structural slabs with higher levels of structural indeterminacy. The load-deflection curves of corner-supported slabs containing low ductility WWF are brittle, and the slabs have little ability to undergo plastic deformation at peak load.
 
Key Words
    ductility; reinforced concrete slabs; low ductility reinforcement; strength; strain localization
 
Address
Zafer Sakka: Energy and Building Research Center, KISR, P.O. Box 24885 Safat 13109, Kuwait
R. Ian Gilbert: School of Civil and Environmental Engineering, UNSW, Sydney, Australia
 

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