Flexural fatigue behaviour of a heated ultra-high-performance fibre-reinforced concrete

Ríos, José D.; Cifuentes, Héctor; Blasón, S.; Aenlle, Manuel López; Concha, Antonio Martínez-De La

doi:10.1016/j.conbuildmat.2020.122209

Cited by 18 publications

(4 citation statements)

References 67 publications

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“…Comprehensive studies of the fatigue performance of NC beams were developed by researchers [35,36], and that of UHPC beams was studied as well [37,38]. For actual structures, UHPC members in service are subjected to the greater stress ranges attributed to its superior mechanical properties; as a consequence, UHPC members tend to be more sensitive to fatigue load levels in service life compared with NC members [39]. The effects of load range on the flexural performance of UHPC-NC composite beams under repeated loading were reported in published studies.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Fatigue Behavior of Reinforced UHPC-NC Composite Beams under Cyclic Loading

Wang,

Ji,

et al. 2024

Materials

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Ultra-high-performance concrete (UHPC), a new cement-based material that offers high mechanical strength and good durability, has been widely applied in construction and rehabilitation projects in recent years. An optimum bending system is achieved by positioning the UHPC layer at the bottom tensile zone of the composite beam and placing the normal-strength concrete (NC) layer at the upper compression zone, which is described as the UHPC-NC composite beam. The fatigue behavior of reinforced UHPC-NC composite beams was described in this study, with an emphasis on the effects of UHPC layer thickness and fatigue load level on the fatigue life of the beam, deformation of the interface between UHPC and NC layers, as well as the bending stiffness of the beam. A total of 9 reinforced UHPC-NC composite beams were tested under cyclic loading. The test variables include UHPC layer thicknesses (zero, 200, and 360 mm), reinforcement ratios (1.184% and 1.786%), and the upper load levels (0.39~0.65). The results showed that good bonding had been achieved without delamination between UHPC and NC layers prior to the final fatigue failure of the beam, and the bending stiffness of the composite beam experienced a three-stage reduction under cyclic loading. Furthermore, an equation was proposed to predict the stiffness reduction coefficient of UHPC-NC composite beams under cyclic loading.

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Section: Introductionmentioning

confidence: 99%

Experimental Research on Fatigue Behavior of Reinforced UHPC-NC Composite Beams under Cyclic Loading

Wang,

Ji,

et al. 2024

Materials

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“…The results of calculations for three- and four-point flexural fatigue were largely in agreement. According to Rios et al [ 9 ], a high steel-fiber content decreased overall matrix porosity and pore size, which shortened UHPC fatigue life and increased fatigue strength by roughly 78%. Although hybrid PP fiber increases fatigue life dispersion, it has little impact on fatigue strength.…”

Section: Introductionmentioning

confidence: 99%

Study on Flexural Fatigue Properties of POM Fiber Airport Pavement Concrete

et al. 2022

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Polyoxymethylene (POM) fiber is a new polymer fiber with the potential to improve the performance of airport pavement concrete. The effect of POM fiber on the flexural fatigue properties of concrete is an important issue in its application for airport pavement concrete. In this study, four-point flexural fatigue experiments were conducted using ordinary performance concrete (OPC) and POM fiber airport pavement concrete (PFAPC) with fiber volume contents of 0.6 and 1.2%, at four stress levels, to examine the flexural fatigue characteristics of these materials. A two-parameter Weibull distribution test of flexural fatigue life was performed, after examining the change in flexural fatigue deformation using the cycle ratio (n/N). A flexural fatigue life equation was then constructed considering various failure probabilities (survival rate). The results show that POM fiber had no discernible impact on the static load strength of airport pavement concrete, and the difference between PFAPC and OPC in terms of static load strength was less than 5%. POM fiber can substantially increase the flexural fatigue deformation capacity of airport pavement concrete by almost 100%, but POM fiber had a different degree of detrimental impact on the fatigue life of airport pavement concrete compared to OPC, with a maximum decrease of 85%. The fatigue lives of OPC and PFAPC adhered to the two-parameter Weibull distribution, the single- and double-log fatigue equations considering various failure probabilities had a high fitting degree based on the two-parameter Weibull distribution, and their R2 was essentially over 0.90. The ultimate fatigue strength of PFAPC was roughly 4% lower than that of OPC. This study on the flexural fatigue properties of POM fiber airport pavement concrete has apparent research value for the extension of POM fiber to the construction of long-life airport pavements.

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“…Furthermore, they observed that the effects of AEA are only effective up to a certain content (in this case, 0.3%), after which the porosity begins to decrease. In the specific case of SFRC, some investigations focus on the influence of fiber addition on porosity [131,132]. Mínguez et al [131] studied the evolution of porosity at early ages of high-strength mortar with and without fibers.…”

Section: Porositymentioning

confidence: 99%

“…On the other hand, several works have been published using microCT to analyze the influence of porosity on the fatigue behavior of concrete [97,132,133]. Vicente et al [133] studied the effects of pore morphology on the compressive fatigue response of concrete.…”

Section: Porositymentioning

confidence: 99%

Flexural fatigue of high-strength plain and fiber-reinforced concrete: influence of mesostructure and study of size effect

Mena Alonso

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This doctoral thesis is not the result of the efforts of a single person, so I would like to acknowledge all those persons or entities that, in one way or another, have contributed to its development.My thanks to the Ministerio de Universidades of the Government of Spain for the funding received through its grants Formación del Profesorado Universitario. I would also like to thank the University of Burgos, and especially the Department of Civil Engineering, for allowing me to use its magnificent facilities.I want to express my gratitude to my thesis directors, Miguel Ángel Vicente and Dorys González, as well as to Jesús Mínguez. Their extensive experience has been a great asset, but equally important has been their full disposition and the sincere and kind treatment they have always offered me.Thanks to the technicians of the School of Engineering for their help and professionalism during the testing campaign. My special recognition goes to Antonio Fernández, who has always given me his unconditional support.Finally, I would like to thank my parents, my brother and my partner for always being by my side, encouraging me not to give up and to keep going forward.

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Flexural fatigue behaviour of a heated ultra-high-performance fibre-reinforced concrete

Cited by 18 publications

References 67 publications

Experimental Research on Fatigue Behavior of Reinforced UHPC-NC Composite Beams under Cyclic Loading

Experimental Research on Fatigue Behavior of Reinforced UHPC-NC Composite Beams under Cyclic Loading

Study on Flexural Fatigue Properties of POM Fiber Airport Pavement Concrete

Flexural fatigue of high-strength plain and fiber-reinforced concrete: influence of mesostructure and study of size effect

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