Title:
Numerical Compressive Toughness of Steel Fiber-Based Reinforced Concrete with Various Densities
Author(s):
Hak-Young Kim, Hye-Jin Lee, Keun-Hyeok Yang, and Seung-Jun Kwon
Publication:
Materials Journal
Volume:
120
Issue:
6
Appears on pages(s):
61-70
Keywords:
compressive toughness; concrete density; fiber reinforcing index; stress-strain relationship
DOI:
10.14359/51739114
Date:
12/1/2023
Abstract:
A reliable compressive stress-strain model was established for
concrete with varying densities reinforced with either steel fibers
alone, or a combination of steel fibers and micro-synthetic fibers.
Moreover, a simple equation was presented to determine the
compressive toughness index of fiber-reinforced concrete in a
straightforward manner. The fiber reinforcing index was introduced
to explain the effect of various parameter conditions of fibers
on the enhancement of the concrete properties under compression.
Numerical and regression analyses were performed to derive equations to determine the key parameter associated with the slope at the pre- and post-peak branches and compressive toughness index
through extensive parametric studies. The proposed models are
promising tools to accurately predict the stress-strain relationships
of fiber-reinforced concrete with different densities, resulting
in less-scattered values between experiments and predictions,
and reasonably assess the efficiency of fiber reinforcements in
enhancing the compressive response of concrete.
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