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Nonlinear modeling of SFRC beam using multilinear softening function obtained by inverse analysis
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Nonlinear modeling of SFRC beam using multilinear softening function obtained by inverse analysis
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Journal Article
Nonlinear modeling of SFRC beam using multilinear softening function obtained by inverse analysis
2019
Overview
The modeling of steel fiber reinforced concrete (SFRC) is a challenging task in comparison with the conventional reinforced concrete structures. Softening functions used to numerically reproduce SFRC fracture need to describe the effects associated with the post-cracking residual strength induced by the fibers in the concrete matrix. In order to do this, multilinear softening functions can be used to consider these effects. The work presents the results of a study in which the behavior of a SFRC beam tested in four-point bending test is compared with the responses obtained in nonlinear simulations using the finite element method. Multilinear softening functions are obtained through an inverse analysis technique, aiming to reproduce the phenomena of appearance and propagation of cracks. The simulations were performed using ATENA/GiD software. The technique adopted to find the softening function of SFRC allowed to reproduce, with a good agreement, the behavior reported experimentally.
Publisher
IOP Publishing
