Ultra-High-Performance Fiber-Reinforced Concrete under Cyclic Loading

Paschalis, Spyridon A.; Λαμπρόπουλος, Ανδρέας

doi:10.14359/51688928

Cited by 17 publications

(23 citation statements)

References 16 publications

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“…As in [7], three different A picture illustrating the tensile test set-up is shown in Figure 2b. Similar set-ups have been recently used to characterize the tensile strength of UHPFRC in [20,21]. Two linear variable differential transformers (LVDT), connected to a custom steel frame, have been used to record the elongation, and also to drive the electro-mechanical testing machine (AllroundLine Zwick Z250 [22], Zwick GmbH & Co. KG, Ulm, Germany).…”

Section: Resultsmentioning

confidence: 99%

Feasibility Study of a Table Prototype Made of High-Performance Fiber-Reinforced Concrete

et al. 2017

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The challenging and innovative idea of realizing a table totally made of fiber-reinforced concrete is explored through an interdisciplinary research activity, where contributions coming from different fields (design, material science, experimental testing, numerical modeling) are combined. The paper describes the different phases of the study, starting from the design of the table, moving through the development of a purpose-made high-performance fiber-reinforced concrete and the mechanical characterization via experimental testing, and concluding with numerical modeling. Numerical results are determined by implementing a damage plasticity constitutive model in a finite element code. The mechanical response of the table has been analyzed for different loading and boundary conditions, and an exhaustive and complete picture of the possible failure mechanisms has been drawn. Simulations have clearly described the different stress-softening processes of damage evolution and plastic strains localization, pointing out the vulnerable parts of the table. Finally, strategies for improving the table mechanical performances are discussed.Technologies 2017, 5, 41 2 of 13 structural elements (beams, plates, etc.) or prefabricated components. Only recently, attention has been paid to their use in three-dimensional printing techniques of real buildings [8].In the present work, application of fiber-reinforced concretes to the field of design is explored. At present, just a few design objects made of concrete have been proposed (for instance, see [9]), where concrete is never used as structural material. Here we propose the study of a table totally made of FRC, which has been designed by Metrica srl, a design studio in Milan, Italy. The designers felt the need to design an object that could provide the same design answers of the structures conceived by the great engineer. "Lightness" is the word that describes the achievements in the field of structural engineer that ranged from functionalist expressions to more organic and freeform/nature-based shapes. In the world of domestic and contract furniture, results are often pointing toward the opposite direction. Moreover, weight is another key-factor to take into consideration. The table has been called "Nervi table", in tribute of Pier Luigi Nervi, engineer and architect worldwide known for his innovative use of reinforced concrete. Renderings of the table are proposed in Figure 1. As can be seen, because of its thin and slender form, the Nervi table represents an interesting structural challenge, achieved only by combining efforts from different research fields.

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Section: Resultsmentioning

confidence: 99%

Feasibility Study of a Table Prototype Made of High-Performance Fiber-Reinforced Concrete

et al. 2017

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“…Many studies have confirmed the superior mechanical and damage tolerance properties of UHPFRC under monotonic or blast loading. According to there are published studies where the direct tensile and the flexural behaviors of UHPFRC have been investigated and the superior tensile strength and postcrack energy absorption have been highlighted. There are also studies on the performance of UHPFRC (material) under cyclic loading (Ref.…”

Section: Introductionmentioning

confidence: 99%

“…There are also studies on the performance of UHPFRC (material) under cyclic loading (Ref. ), and it is evident that the structural elements is highly affected by the behavior of the UHPFRC. According to there is a degradation of the modulus of elasticity of the UHPRFC with the number of loading cycles.…”

Section: Introductionmentioning

confidence: 99%

Cyclic behavior of ultra‐high performance fiber reinforced concrete beam‐column joint

Sarmiento

Torres

Valencia

et al. 2018

Structural Concrete

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Ultra-high performance fiber reinforced concrete (UHPFRC) is a unique class of fiber-reinforced concrete featuring ultra-high compressive strength and ductile tensile strain hardening behavior, accompanied by multiple narrow cracking. Although many studies have confirmed its superior mechanical and damage tolerance properties under monotonic or blast loading, limited research has been carried out on the cyclic performance of UHPFRC structural members. This paper proposes the use of UHPFRC to improve the cyclic performance of structural elements. An experimental program was carried out on a large number of UHPFRC beam-column joint specimens under a cyclic lateral load. After the cyclic loading test, the following results were obtained: (a) hysterical performance, (b) maximum load, (c) maximum displacement, (d) the maximum energy dissipation (measured by hysteresis cycles), (e) stiffness degradation, (f ) the cracking pattern, and (g) the cracking area. The analysis showed that UHPFRC specimens have at least 157% higher energy dissipation than nonfiber conventional reinforced concrete (RC). The initial stiffness of UHPFRC specimens without fibers (NF) was at least 23% higher than the RC specimen. For UHPFRC with fiber, initial stiffness was at least 45% higher than RC specimen.

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“…Paschalis and Lampropoulos investigated the size effect on the flexural performance of UHPFRC and it was found that as the depths of the prisms increased the flexural strength decreased. The unique properties and the application of UHPFRC under monotonic and cyclic loading in structural cases, where high mechanical properties are required, were highlighted in a number of studies …”

Section: Introductionmentioning

confidence: 99%

“…The unique properties and the application of UHPFRC under monotonic and cyclic loading in structural cases, where high mechanical properties are required, were highlighted in a number of studies. [10][11][12][13][14] The superior performance of UHPFRC can be attributed to the enhanced tensile behavior. However, until now, the effect of fibers and curing conditions on the tensile stressstrain behavior have not been investigated thoroughly.…”

Section: Introductionmentioning

confidence: 99%

Fiber content and curing time effect on the tensile characteristics of ultra high performance fiber reinforced concrete

Paschalis

Λαμπρόπουλος

2017

Structural Concrete

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Ultra high performance fiber reinforced concrete (UHPFRC) is a concrete type with superior mechanical properties and of a relatively high tensile strength. The tensile stress–strain characteristics of UHPFRC are highly affected by the mixture design and the curing regime. In this study, an extensive experimental investigation has been conducted with direct tensile tests on a number of specimens that contained different percentages of steel fibers and different cement types were applied. Also, various curing regimes were investigated. Different models depending on the steel fiber amount were proposed for the simulation of the stress–strain and the stress‐crack opening response of UHPFRC, while the fracture energy was also calculated for the different fiber contents. Finally, the effect of fiber content and curing time on the variation of the experimental results are discussed.

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Ultra-High-Performance Fiber-Reinforced Concrete under Cyclic Loading

Cited by 17 publications

References 16 publications

Feasibility Study of a Table Prototype Made of High-Performance Fiber-Reinforced Concrete

Feasibility Study of a Table Prototype Made of High-Performance Fiber-Reinforced Concrete

Cyclic behavior of ultra‐high performance fiber reinforced concrete beam‐column joint

Fiber content and curing time effect on the tensile characteristics of ultra high performance fiber reinforced concrete

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