Calibration of group effect parameters through genetic algorithms for micromechanical modeling of UHPFRC

Ribeiro, Paula de Oliveira; Krahl, Pablo Augusto; Carrazedo, Ricardo

doi:10.1016/j.compstruct.2021.114933

Cited by 1 publication

(2 citation statements)

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“…The interfacial parameter β can be achieved by fitting the experimental fiber pullout curve. Furthermore, research suggests that the β parameter is influenced by the fiber inclination and fiber content in the matrix (Lei et al, 2021 [33]; Ribeiro, Krahl and Carrazedo, 2022 [34]). The pullout test provides parameters used in the constitutive models for UHPFRC.…”

Section: Fiber Pulloutmentioning

confidence: 99%

“…Similar expressions are still used to predict the tensile behavior of UHPFRC (Abrishambaf, Pimentel and Nunes, 2019 [17]). Recently, Ribeiro, Krahl, and Carrazedo (2022) [34] solved the integral for the analytical model P(w,l e ) that includes the interfacial parameter β, the group effect coefficient ξ, and any orientation. Hence, the fiber contribution to the composite strength can be calculated from Equation (11):…”

Section: Fiber Bridging Actionmentioning

confidence: 99%

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Modeling the Tensile Behavior of Fiber-Reinforced Strain-Hardening Cement-Based Composites: A Review

et al. 2023

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Strain-Hardening Cement-Based Composites (SHCCs) exhibit high toughness and durability, allowing the design of resilient structures. Despite the exceptional properties of SHCC and the current modeling techniques, the widespread use of the composite is limited. One limiting factor is developing and validating analytical models that could be used for optimizing mixes and designing structural elements. Furthermore, the composite mechanical response is complex and depends on several phenomena, such as fiber pullout, fiber orientation and distribution, size effect, fiber content, group effect, embedding length, fiber dimensions, and matrix strength. In this context, this research presents the state-of-the-art on the micro- and mesomechanisms occurring in SHCC during cracking and robust techniques to predict its tensile behavior accounting for such phenomena already proved experimentally. The study is relevant for designers and the scientific community because it presents the gaps for the research groups to develop new investigations for consolidating SHCC, which is a material to produce resilient structures.

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Section: Fiber Pulloutmentioning

confidence: 99%