Behavior and strength of beams cast with ultra high strength concrete containing different types of fibers

Kamal, Mounir M.; Safan, Mohamed A.; Etman, Zeinab A.; Salama, Radwa A.

doi:10.1016/j.hbrcj.2013.09.008

Cited by 76 publications

(39 citation statements)

References 8 publications

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“…The results showed that the use of fibers reduced crack widths. It was also noted that higher ductility ratios were obtained as the reinforcement ratio increases . Yoo et al conducted experimental and numerical investigations on the UHPFRC beams with different reinforcement ratios less than 0.02.…”

Section: Introductionmentioning

confidence: 99%

Flexural behavior of ultra‐high‐performance fiber reinforced concrete beams with low and high reinforcement ratios

Hasgül

Türker

Birol

et al. 2018

Structural Concrete

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In the study, the effects of using ultra‐high‐performance fiber reinforced concrete (UHPFRC) on deflection and curvature ductilities, moment capacities, flexural stiffness, and cracking behaviors of beams were experimentally investigated. Eight singly reinforced beams with four tensile reinforcement ratios (0.009, 0.019, 0.028, and 0.043) were tested under four‐point loading to create a pure moment behavior in the mid region. The evaluations were made by comparing the UHPFRC beams and non‐fiber beams containing UHPFRC matrix without steel fiber. Straight micro‐steel fibers with volumetric ratio of 1.5% were used in the UHPFRC matrix. The results of study indicate that the use of UHPFRC for beams having especially high reinforcement ratios provides significant advantages in terms of the considered parameters. Especially high compressive strength and deformation capacity of the UHPFRC allow the use of high reinforcement ratios in beams which results in more economical sizes as long as the beam deflections ensure for both the serviceability and the ultimate limit states. In this study, however, the simplified numerical approach developed for the flexural design of fiber reinforced concrete was applied to the UHPFRC beams, as well.

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Section: Introductionmentioning

confidence: 99%

Flexural behavior of ultra‐high‐performance fiber reinforced concrete beams with low and high reinforcement ratios

Hasgül

Türker

Birol

et al. 2018

Structural Concrete

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“…For example, plastic fibers such as polypropylene increase the compressive strength by 2.5% in comparison to the mix without fibers, whereas steel achieves an increase of 6% [18]. Further research is being conducted on this topic, aiming for a more sustainable material with less steel fiber content.…”

Section: General Propertiesmentioning

confidence: 99%

The use of Ultra High Performance Fibre Reinforced cement-based Composites in rehabilitation projects: a review

Martín-Sanz¹,

Chatzi²,

Brühwiler³

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Ultra High Performance Fibre Reinforced cement-based Composites (UHPFRC) form a novel material developed over the last two decades. A set of special traits, such as durability, outstanding material properties, and ease of application, render UHPFRC particularly attractive for the improvement (rehabilitation, strengthening) of concrete structures. Laboratory tests indicate a compressive strength, which ranges from 150 to 200 MPa, while tensile strength lies in the range of 7-15 MPa. The fibres play an important role in defining the range of these properties depending on the content (3-6%), orientation, length and composition. As a consequence, UHPFRC delivers a workable material whose mechanical properties may be properly adjusted according to the desired application scheme. As indicated via laboratory testing and in-situ experience, the durability of the structure may be extended not only due to the properties of UHPFRC but also due to the additional protection it offers to the reinforcement. This paper provides an overview on existing findings of UHPFRC implementations, focusing in the domain of improvement of structures. Within this context, UHPFRC may be applied on top of existing bridge decks [1],with or without steel rebars, ensuring full bond conditions via mere surface preparation prior to casting. In exploiting the attributes of UHPFRC within a rehabilitation context, further applications are being explored, such as strengthening of orthotropic steel decks in order to prevent fatigue issues [2]. Nonetheless, it should also be acknowledged that certain aspects need to be improved such as the development of a multi scale analysis framework, able to provide a detailed computational method without detriment to time efficiency. The introduction of monitoring technologies in structures with UHPFRC would unquestionably provide valuable insight into its long-term performance and help validate this scheme for the next generation of rehabilitation interventions.

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“…Ancak bu tür betonların betonarme elemanlarda kullanımı ile ilgili çalışmalar kısıtlıdır. Yapılan çalışmalarda bu betonların geleneksel donatılı betonarme kiriş elemanlarda kullanımının önemli avantajlar sağlama potansiyeli rapor edilmiştir (Kamal et al 2014;Yang et al 2010;Stürwald and Fehling 2012;Dancygier and Savir 2006;Bertram and Hegger 2008;Voo et al 2010 …”

Section: Introductionunclassified

Effective Steel Fiber Type Investigation on Ultra High Performance Fiber Reinforced Concrete Beams

Türker¹,

Birol²,

Yavaş³

et al. 2016

AKU-J. Sci. Eng.

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Anahtar kelimelerUltra yüksek performanslı lifli beton; Çelik lif; Betonarme kiriş; Eğilme davranışı. ÖzetÇalışmada, ultra yüksek performanslı lifli beton içeren betonarme kirişlerde eğilme davranışı bakımından etkin çelik lif tipinin deneysel olarak incelemesi yapılmıştır. Bunun için biri lifsiz, diğer dördü farklı çelik lif tipi içeren beş adet 100x150x1500 mm boyutlarında kiriş üzerinde eğilme testleri gerçekleştirilmiştir. Çalışmada 120 MPa üzeri basınç dayanımına sahip, hacimce %1.5 oranında çelik lif içeren beton kullanılmıştır. Lif olarak düz mikro lif tipi (F6), iki adet tek kancalı makro lif tipi (F30 ve F60_1) ve bir adet çift kancalı lif tipi (F60_2) incelenmiştir. Eğilmede etkin çelik lif tipi değerlendirmesi yerdeğiştirme süneklikleri, yük taşıma kapasiteleri ve çatlak özelliklerine göre yapılmıştır. Çalışmada elde edilen sonuçlardan; yük taşıma kapasitesi ve çatlakları sınırlandırma bakımından çift kancalı makro lifin (F60_2), yerdeğiştirme sünekliği bakımından ise düz mikro lifin (F6) en etkin lif olduğu belirlenmiştir. Effective Steel Fiber Type Investigation on Ultra High Performance Fiber Reinforced Concrete BeamsKeywords Ultra high performance fiber reinforced concrete; Steel fiber; Reinforced concrete beam; Flexural behavior. AbstractThis study investigates the effective steel fiber type on ultra high performance fiber reinforced concrete beams with respect to flexural behavior. Five 100x150x1500 mm reinforced concrete beams, one is non-fiber and the others include four different steel fiber types, were tested in flexure. The concrete used in this study had compressive strength over 120 MPa and included 1.5% steel fibers by volume. Two types of hooked macro steel fibers (F30 and F60_1), double hooked macro (F60_2) and straight micro (F6) steel fibers were investigated. Evaluation of the effective steel fiber type on the flexural behavior were performed in terms of displacement ductility, load bearing capacity and cracking behavior. From the results of the study, it is determined that the most effective steel fiber for load bearing capacity and cracking control is double hooked steel fiber (F60_2) and most effective fiber for displacement ductility is straight micro fiber (F6).

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Behavior and strength of beams cast with ultra high strength concrete containing different types of fibers

Cited by 76 publications

References 8 publications

Flexural behavior of ultra‐high‐performance fiber reinforced concrete beams with low and high reinforcement ratios

Flexural behavior of ultra‐high‐performance fiber reinforced concrete beams with low and high reinforcement ratios

The use of Ultra High Performance Fibre Reinforced cement-based Composites in rehabilitation projects: a review

Effective Steel Fiber Type Investigation on Ultra High Performance Fiber Reinforced Concrete Beams

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