Modeling the Compressive Behavior of Steel Fiber Reinforced Concrete Under High Strain Rate Loads

Honeyeh Ramezansefat*, Mohammadali Rezazadeh, Joaquim A.O. Barros, Isabel B. Valente, Mohammad Bakhshi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Concrete is a strain-rate sensitive material and shows relatively low ductility and energy dissipation capacity under high strain rate loads (HSRL) such as blast and impact, representative of terrorist attacks and accidents. Experimental research in the literature has evidenced that introducing steel fibers, into the concrete mixtures can significantly improve the concrete behavior under HSRL. Besides the experimental research, development of design models is an important aspect to provide more confidence for engineers to use SFRC in structural elements when subjected to HSRL. The existing design codes (e.g. CEB-FIP Model Code 1990 and fib Model Code 2010) propose models for the prediction of the strengths of concrete under different HSRL, but they are only function of strain rate. In this regard, the current paper deals with the improvement of design models in the fib Model Code 2010 for the prediction of the compressive behavior of SFRC by considering the effects of the important parameters such as volume fraction, aspect ratio and tensile strength of steel fibers, and concrete compressive strength, besides the strain rate effect. The developed artificial neural network mathematical model is calibrated and its predictive performance is assessed using a database collected from the existing compressive impact tests results on SFRC specimens.

Original languageEnglish
Title of host publicationFibre Reinforced Concrete
Subtitle of host publicationImprovements and Innovations - RILEM-fib International Symposium on FRC BEFIB in 2020
EditorsPedro Serna, Aitor Llano-Torre, José R. Martí-Vargas, Juan Navarro-Gregori
Place of PublicationCham
PublisherSpringer
Pages703-713
Number of pages11
Volume30
ISBN (Electronic)9783030584825
ISBN (Print)9783030584818, 9783030584849
DOIs
Publication statusPublished - 2021
Externally publishedYes
EventRILEM-fib International Symposium on FRC, BEFIB 2020 - Valencia, Spain
Duration: 21 Sep 202023 Sep 2020

Publication series

NameRILEM Bookseries
Volume30
ISSN (Print)2211-0844
ISSN (Electronic)2211-0852

Conference

ConferenceRILEM-fib International Symposium on FRC, BEFIB 2020
CountrySpain
CityValencia
Period21/09/2023/09/20

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