Interfacial Transition Zone in Mature Fiber-Reinforced Concretes

Roig-Flores, Marta; Šimicevic, Filipa; Maričić, Ana; Serna, Pedro

doi:10.14359/51702419

Cited by 1 publication

(1 citation statement)

References 17 publications

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“…According to their study, there are mainly two different mechanisms of adhesion between the matrix and the fibers, namely, physiochemical adhesion and static friction mechanism at the contact surface. The first mechanism is mainly defined by the properties of Interfacial Transition Zone (ITZ), which depends on the surface characteristics and the chemical reaction of the fibers with the matrix [12][13][14]. The second mechanism is highly dependent on the geometric shape of the fibers.…”

Section: Introductionmentioning

confidence: 99%

On the Pull-out Behavior of Hooked-End Shape Memory Alloys Fibers Embedded in Ultra-High Performance Concrete

Baghal

Maleki

Vafaei

2021

Int. j. eng. technol. innov.

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This study presents a three-dimensional non-linear finite element investigation on the pull-out behavior of straight and hooked-end Shape Memory Alloys (SMA) and steel fibers embedded in Ultra-High Performance Concrete (UHPC) using a single fiber pull-out model. A bilinear cohesive zone model is used to characterize the interfacial traction separation relationships. The Concrete Damage Plasticity (CDP) model is used to simulate UHPC, and the mechanical behavior is obtained through experimental tests. Parametric studies are conducted to evaluate the effects of fiber materials, fiber diameters, and hook angles on the load-displacement behavior. A good agreement between the numerical and experimental results is obtained. It is found that the hooked-end fibers with a smaller diameter and a hook angle of 40° can be a better choice for structural application. Furthermore, it is observed that the use of SMA fibers significantly improves the pull-out performance between fibers and UHPC.

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Section: Introductionmentioning

confidence: 99%