Fiber Reinforced Concrete
Mostrando 25-36 de 86 artigos, teses e dissertações.
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25. Workability Analysis of Steel Fiber Reinforced Concrete Using Slump and Ve-Be Test
This works present an experimental study addressing the workability of fiber reinforced concrete (FRC). Only conventional measurements, such as slump and Ve-Be test, were used to evaluate the effect of the fiber content in the mixture. The fiber content shows to be of great influence in the concrete mobility reducing the slump and increasing exponentially th
Mat. Res.. Publicado em: 03/11/2015
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26. Effect of CFRP and TRM Strengthening of RC Slabs on Punching Shear Strength
Abstract The paper presents experiments involving punching of RC slabs strengthened using externally bonded carbon fiber reinforced polymer (CFRP) sheet and textile reinforced mortar (TRM). Twelve RC slab specimens of two concrete grades (39.9 and 63.2 MPa) and employing two strengthening schemes (CFRP and TRM) were tested. Specimens were supported on two op
Lat. Am. j. solids struct.. Publicado em: 2015-09
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27. Shear Strengthening of RC Deep Beams with Sprayed Fiber-reinforced Polymer Composites (SFRP): Part 2 Finite Element Analysis
AbstractThis paper presents the finite element analysis conducted on SFRP strengthened reinforced concrete (RC) deep beams. The analysis variables included SFRP material (glass and carbon), SFRP thickness (3 mm and 5 mm), SFRP configuration and strength of concrete. The externally applied SFRP technique is significantly effective to enhance the ultimate load
Lat. Am. j. solids struct.. Publicado em: 2015-07
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28. Effects of CFRP retrofit on impact response of shear-deficient scaled reinforced concrete beams
An experimental procedure is carried out to investigate response features of semi-deep reinforced concrete (RC) beams with dominant static shear failure subjected to low-velocity impact dynamic load both in intact and retrofitted cases. Built specimens have scaled geometry and material properties preserving physical similarity with full-scale members and are
Lat. Am. j. solids struct.. Publicado em: 2015-01
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29. Fracture behavior of polymeric fiber reinforced lightweight structural concrete
A study has been made of the effect of short randomly dispersed polypropylene fibers on the fracture behavior of lightweight structural concrete. Using unnotched and precracked beams subjected to bend loading, it was possible to determine the toughness factor TF and to estimate specific J integral parameters, namely J IC and J MAX corresponding to the onset
Mat. Res.. Publicado em: 2014-12
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30. Prediction of energy absorption capability in fiber reinforced self-compacting concrete containing nano-silica particles using artificial neural network
The main objective of the present work is to utilize feedforward multi-layer perceptron (MLP) type of artificial neural networks (ANN) to find the combined effect of nano-silica and different fibers (steel, polypropylene, glass) on the toughness, flexural strength and fracture energy of concrete is evaluated.For this purpose, 40 mix plot including 4 series A
Lat. Am. j. solids struct.. Publicado em: 2014-11
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31. Strengthening of structurally damaged wide shallow RC beams using externally bonded CFRP plates
Reinforced concrete wide shallow beams (WSBs) are commonly used in the joist flooring systems. The structural behavior of WSBs strengthened with carbon fiber reinforced polymer (CFRP) reinforcement was studied on isolated beams and as part of full-scale building. The effect of structural damage on the performance of WSBs flexurally strengthened with CFRP pla
Lat. Am. j. solids struct.. Publicado em: 2014-11
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32. Waste steel wires modified structural lightweight concrete
Nowadays, the use of different waste fibers in concrete has started to increase rapidly due to some reasons such as economic savings and positive effects on the environment. In this study, waste steel wires taken from reinforcement and formwork which were previously utilized in construction projects, were employed in structural lightweight concrete (SLWC). T
Mat. Res.. Publicado em: 28/07/2014
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33. Prediction of combined effects of fibers and nanosilica on the mechanical properties of self-compacting concrete using artificial neural network
In this research, the combined effect of nano-silica particles and three fiber types (steel, polypropylene and glass) on the mechanical properties (compressive, tensile and flexural strength) of reinforced self-compacting concrete(SCC) is evaluated. For this purpose, 70 mixtures in A, B, C, D, E, F and G series representing 0, 1, 2, 3, 4, 5 and 6 percent of
Lat. Am. j. solids struct.. Publicado em: 2014
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34. Ligação viga-pilar em elementos pré-moldados de concreto solidarizados por concreto reforçado com fibras de aço: análises estática e dinâmica / Beam-column connection in precast concrete structures using steel fiber reinforced concrete
No presente trabalho, utiliza-se concreto com fibras de aço, traspasse de armaduras e chaves de cisalhamento para desenvolver uma ligação viga-pilar capaz de resistir a ações cíclicas e dinâmicas e que possa ser empregada na pré-moldagem de estruturas de casas de força de usinas hidrelétricas. Para atingir este objetivo, inicialmente foram realizad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/06/2012
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35. Estudo da variabilidade da tenacidade de concretos reforçados com fibras de aço por meio de ensaios à flexão em prismas moldados e extraídos / Study of the variability of thoughness in steel fiber reinforced concrete by flexural tests in molded and
O concreto reforçado com fibras de aço (CRFA) tem seu principal campo de aplicação nos pisos industriais e pavimentos. Em função das características de redistribuição de esforços que apresentam tais estruturas - placas apoiadas sobre uma base elástica - é possível a substituição total das armaduras convencionais pelas fibras de aço, acelerand
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2012
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36. Mechanical properties of recycled PET fibers in concrete
Fiber-reinforced concrete represents the current tendency to apply more efficient crack-resistant concrete. For instance, polyethylene terephthalate (PET) is a polyester polymer obtained from recyclable bottles; it has been widely used to produce fibers to obtain cement-based products with improved properties. Therefore, this paper reports on an experimental
Materials Research. Publicado em: 31/07/2012