Numerical analysis on displacements of steel-fiber-reinforced concrete beams

Mateus Fereira Pontes,Wanderlei Malaquias Pereira Junior,José Júlio De Cerqueira Pituba

doi:10.1590/s1983-41952020000600007

Mateus Fereira Pontes, Wanderlei Malaquias Pereira Junior + Show 1 more

Open Access

https://doi.org/10.1590/s1983-41952020000600007

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Abstract

abstract: This work deals with parametric analyses of the structural behaviour of steel-fiber-reinforced concrete using a Damage Constitutive Model and homogenization technique. This approach is contemporary once Brazil has not a standard procedure for the design of this type of material. The present study performs a parametric analysis of rectangular beams subjected to flexion at four points, with height variations (h), reinforcement area (As) and span (L) are used to verify the influence of each parameter on the numerical study of the deformability of beams composed by this material. Fiber volume concentrations of 2.00% and 2.50% have been used on the modelling. It is observed that the obtained results were mainly affected by height and span. It is noticeable that the inclusion of steel fibers leads to an increase in the maximum load and ductility of the analyzed beams in this work.

Highlights

Concrete is one of the most used materials as a constituent of structural elements [1], [2] and due to its great importance, several numerical models are developed to simulate its mechanical behaviour [3].In several situations there is a need for the concrete to resist tensile and bending loads, making it necessary to use longitudinal and transverse reinforcements
In the context of studies performed in this work, it was evidenced that the steel fibers have a great potential to improve the mechanical properties of the concrete, which can promote gains in the ductility of the structural elements
The results obtained in this work confirm that height and span length are perhaps the most influential properties on the deformability process of damaged structural elements

Summary

Introduction

Concrete is one of the most used materials as a constituent of structural elements [1], [2] and due to its great importance, several numerical models are developed to simulate its mechanical behaviour [3].In several situations there is a need for the concrete to resist tensile and bending loads, making it necessary to use longitudinal and transverse reinforcements. Concrete is one of the most used materials as a constituent of structural elements [1], [2] and due to its great importance, several numerical models are developed to simulate its mechanical behaviour [3]. New ways of using this material have been developed, as example, the use of metallic fibers in simple and reinforced concrete. Salvador et al [4] says that metal fibers have.

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