Investigation of direct shear strength mechanisms of steel and PVA fiber-reinforced concrete
DOI:
https://doi.org/10.5433/1679-0375.2022v43n1p11Keywords:
Direct shear, Push-off, Steel fibers, PVA fibers, Dowel actionAbstract
Some mechanical properties of concrete can be improved with the addition of other materials, such as the incorporation of fibers, which results in increased tensile strength and toughness, presenting post-cracking behavior that significantly contributes to the transfer of shear stresses, especially in planes that are propitious to the formation of cracks. To evaluate the effects of the addition of fibers to concrete, in terms of the ultimate shear strength and the mechanisms that constitute it, such as cohesion between the component materials, aggregate interlock, friction and dowel action, an experimental program was carried out. Two mixtures were produced from a conventional concrete mix, with the addition of 0.5% steel fibers and 0.2% synthetic polyvinyl alcohol, PVA fibers. Specimens for direct shear testing, push-off type, were molded, with and without transverse shear reinforcement, and a steel-concrete bond condition was set as a variable. The results showed that the addition of steel fibers results in a significant increase in the shear strength of concrete, na effect not observed with PVA fibers. The aggregate interlock and cohesion mechanisms were responsible for approximately 70% of the ultimate shear strength in all the concrete tested, while the rest was attributed to friction and the dowel effect.
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ARAIN, M. F.; WANG, M.; CHEN, J.; ZHANG, H. Study on PVA fiber surface modification for strain-hardening cementitious composites (PVA-SHCC). Construction and Building Materials, Guildford, v. 197, p. 107-116, 2019. DOI: https://doi.org/10.1016/j.conbuildmat.2018.11.072.
ARAÚJO, D. L.; DANIN, A. R.; MELO, M. B.; RODRIGUES, P. F. Influence of steel fibers on the reinforcement bond of straight steel bars. Revista Ibracon de Estruturas e Materiais, São Paulo, v. 6, n. 2, p. 307-338, 2013. DOI: http://dx.doi.org/10.1590/S1983-41952013000200008.
ARAÚJO, D. L.; NUNES, F. G. T.; TOLEDO FILHO, R. D.; ANDRADE, M. A. S. Shear strength of steel fiber-reinforced concrete beams. Acta Scientiarum Technology, Maringá, v. 36, n. 3, p. 389, feb. 2014. DOI: https://doi.org/10.4025/actascitechnol.v36i3.19005.
BIRKELAND, P. W.; BIRKELAND, H. W. Connections in Precast Concrete Construction. ACI Journal Proceedings, [s. l.], v. 63, n. 3, 1966.
GALI, S.; SUBRAMANIAM, K. V. L. Cohesive stress transfer and shear capacity enhancements in hybrid steel and macro-polypropylene fiber reinforced concrete. Theoretical and Applied Fracture Mechanics, [Canadá], v. 103, p. 102-124, 2019. DOI: https://doi.org/10.1016/j.tafmec.2019.102250.
GARCEZ, E. O. Investigação do comportamento de Engineered Cementitious Composites reforçados com fibras de polipropileno como material para recapeamento de pavimentos, 2009. Thesis (Doctorate in Civil Engineering) - Federal University of Rio Grande do Sul, Porto Alegre,2009.
GHASEMI, M.; GHASEMI, M. R.; MOUSAVI, S. R. Investigating the effects of maximum aggregate size on self-compacting steel fiber reinforced concrete fracture parameters. Construction and Building Materials, Guildford, v. 162, p. 674-682, 2018. DOI: https://doi.org/10.1016/j.conbuildmat.2017.11.141.
GRZYMSKI, F.; MUSIAI, M.; TRAPKO, T. Mechanical properties of fibre reinforced concrete with recycled fibres. Construction and Building Materials, Guildford, v. 198, p. 323-331, feb. 2019. DOI: https://doi.org/10.1016/j.conbuildmat.2018.11.183.
HOFBECK, J. A., IBRAHIM, I. O., MATTOCK, A. H. Shear transfer in reinforced concrete. Journal of the American Concrete Institute, Detroit, v. 66, n. 13, p. 119-128, 1969.
HUBER, T.; HUBER, P.; KOLLEGGER, J. Influence of aggregate interlock on the shear resistance of reinforced concrete beams without stirrups. Engineering Structures, New York, v. 186, p. 26-42, 2019. DOI: https://doi.org/10.1016/j.engstruct.2019.01.074.
KHALOO, A.; RAISI, E. M.; HOSSEINI, P.; TAHSIRI, H. Mechanical performance of self-compacting concrete reinforced with steel fibers. Construction and Building Materials, Guildford, v. 51, p. 179-186, 2014. https://doi.org/10.1016/j.conbuildmat.2013.10.054.
KURARAY™. Catálogo Técnico. 2021. Available: https://www.kuraray.com.br/produtos/kuralon/kuralon-k-ii-fibra-de-pva. Accessed: 23 ago. 2021.
LIU, F; XU, K.; DING, W.; QIAO, Y.; WANG, L. Microstructural characteristics and their impact on mechanical properties of steel-PVA fiber reinforced concrete. Cement And Concrete Composites, Amsterdam, v. 123, p. 104-196, 2021. DOI: http://dx.doi.org/10.1016/j.cemconcomp.2021.104196.
LOOV, R. E.; PATNAIK, A. K. Horizontal shear strength of composite concrete beams with a rough interface. PCI Journal, Flórida, p. 228-235, 1994. DOI: https://doi.org/10.15554/pcij.01011994.48.69.
MATTOCK, A. H.; HAWKINS, M. N. Shear transfer in reinforced concrete – Recent research. PCI Journal, Flórida, v. 17, n. 2, p. 55-75, 1972.
MUKHOPADHYAY, S.; KHATANA, S. A review on the use of fibers in reinforced cementitious concrete. Journal of Industrial Textiles, [s. l.], v. 45, n. 2, p. 239-264, 2014. DOI: https://doi.org/10.1177/1528083714529806.
NGUYEN, H. T. N.; TAN, K. H.; KANDA, T. Effect of polypropylene and steel fibers on web-shear resistance of deep concrete hollow-core slabs. Engineering Structures, New York, v. 210, p. 110-123, 2020. DOI: https://doi.org/10.1016/j.engstruct.2020.110273.
RANDL, N. Design Recommendations for Interface Shear Transfer in Fib Model Code 2010. Structural Concrete, London, v. 14, n. 3, p. 230–241, set. 2013. DOI: https://doi.org/10.1002/suco.201300003.
RANDL, N.; ZILCH, K.; MÜLLER, A. Bemessung nachträglich ergänzter Betonbauteile mit längsschubbeanspruchter Fuge. Beton und Stahlbetonbau, Berlin, v. 103, n. 7. P.482-497, 2008. DOI: https://doi.org/10.1002/best.200800627.
RUIZ, M. F.; MUTTONI, A.; SAGASETA, J. Shear strength of concrete members without transverse reinforcement: a mechanical approach to consistently account for size and strain effects. Engineering Structures, New York, v. 99, p. 360-372, 2015. DOI: https://doi.org/10.1016/j.engstruct.2015.05.007.
SAVARIS, G. Resistência ao cisalhamento do concreto autoadensável. 2016. Tese (Doutorado em Engenharia Civil) - Universidade Federal de Santa Catarina, Florianópolis, 2016.
SOETENS, T.; MATTHYS, S. Shear-stress transfer across a crack in steel fibre-reinforced concrete. Cement and Concrete Composites, Amsterdam, v. 82, p. 1-13, 2017. DOI: https://doi.org/10.1016/j.cemconcomp.2017.05.010.
SOLTANI, M.; ROSS, B. E. Evaluation of a four-point bending-test method for interface shear transfer in concrete members. Practice Periodical on Structural Design and Construction, New York, v. 22, n. 4, 2017. DOI: https://doi.org/10.1061/(ASCE)SC.1943-5576.0000325.
TENG, S.; AFROUGHSABET, V.; OSTERTAG, C. P. Flexural behavior and durability properties of high performance hybrid-fiber-reinforced concrete. Construction and Building Materials, Guildford, v. 182, p. 504-515, 2018. DOI: https://doi.org/10.1016/j.conbuildmat.2018.06.158.
THOMAS, J.; RAMASWAMY, A. Mechanical Properties of Steel Fiber-Reinforced Concrete. Journal of Materials in Civil Engineering, Stevenage, v. 19, n. 5, p. 385-392, 2007. DOI: https://doi.org/10.1061/(ASCE)0899-1561(2007)19:5(385).
VITOR, P. C. P.; SANTOS, A. C.; TRAUTWEIN, L. M. Resistência ao cisalhamento em vigas de concreto armado sem armadura transversal reforçadas com fibras de aço. Ambiente Construído, São Paulo, v. 18, n. 3, p. 255-270, 2018. DOI: http://dx.doi.org/10.1590/s1678-86212018000300280.
WANG, Q.; YI, Y.; MA, G.; LUO, H. Hybrid effects of steel fibers, basalt fibers and calcium sulfate on mechanical performance of PVA-ECC containing high-volume fly ash. Cement and Concrete Composites, Amsterdam v. 97, p. 357-368, 2019. DOI: https://doi.org/10.1016/j.cemconcomp.2019.01.009.
WIRAND®. Catálogo Técnico. 2021. Available: https://www.aecweb.com.br/cls/catalogos/maccaferri/wirand.pdf. Accessed: 23 ago. 2021.
XU, L.; DENG, F.; CHI, Y. Nano-mechanical behavior of the interfacial transition zone between steel-polypropylene fiber and cement paste. Construction and Building Materials, Guildford, v. 145, p. 619-638, 2017. DOI: https://doi.org/10.1016/j.conbuildmat.2017.04.035.
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