scholarly journals Material Properties and Structural Applications of Fiber Reinforced Concrete

2012 ◽  
Vol 50 (5) ◽  
pp. 429-432 ◽  
Author(s):  
T. Matsumoto
Keyword(s):  
Reinforced Concrete ◽  
Material Properties ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Structural Applications

scholarly journals Flexural Behavior of Steel Fiber Reinforced Concrete Beams: Probabilistic Numerical Modeling and Sensitivity Analysis

2021 ◽  
Vol 11 (20) ◽  
pp. 9591
Author(s):  
Predrag Blagojević ◽  
Nikola Blagojević ◽  
Danijel Kukaras
Keyword(s):  
Sensitivity Analysis ◽  
Reinforced Concrete ◽  
Material Properties ◽  
Probabilistic Models ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete

One of the principle issues concerning the practical application of steel fiber reinforced concrete (SFRC) is the uncertainty related to its structural behavior, primarily caused by the partially random distribution and orientation of steel fibers in SFRC structural elements. This paper aims to provide a better understanding of how the variance of material properties of the SFRC affects the flexural behavior of SFRC beams. First, a distributed plasticity fiber finite element model of beam flexural behavior is proposed and validated. Then, probability distributions of selected material properties are defined based on existing probabilistic models and experimental results from the literature. Finally, a variance-based sensitivity analysis is performed using Sobol’ indices to identify uncertainties in material properties that contribute most to the uncertainties related to three characteristic points of a beam’s flexural behavior: first crack, yield, and collapse point. Sensitivity analysis is performed by surrogating the numerical model using polynomial chaos expansion. The variance in residual tensile strength is identified as the main contributor to the variance in the flexural behavior of an SFRC beam used in the case study.

scholarly journals Numerical Simulation of the Fracture Behavior of High-Performance Fiber-Reinforced Concrete by Using a Cohesive Crack-Based Inverse Analysis

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 71
Author(s):  
Alejandro Enfedaque ◽  
Marcos G. Alberti ◽  
Jaime C. Gálvez ◽  
Pedro Cabanas
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Inverse Analysis ◽  
High Performance ◽  
Constitutive Models ◽  
Fiber Reinforced Concrete ◽  
Cohesive Crack ◽  
Fiber Reinforced ◽  
Steel Fibres ◽  
Structural Applications

Fiber-reinforced concrete (FRC) has become an alternative for structural applications due its outstanding mechanical properties. The appearance of new types of fibres and the fibre cocktails that can be configured by mixing them has created FRC that clearly exceeds the minimum mechanical properties required in the standards. Consequently, in order to take full advantage of the contribution of the fibres in construction projects, it is of interest to have constitutive models that simulate the behaviour of the materials. This study aimed to simulate the fracture behaviour of five types of FRC, three with steel fibres, one with a combination of two types of steel fibers, and one with a combination of polyolefin fibres and two types of steel fibres, by means of an inverse analysis based on the cohesive crack approach. The results of the numerical simulations defined the softening functions of each FRC formulation and have pointed out the synergies that are created through use of fibre cocktails. The information supplied can be of help to engineers in designing structures with high-performance FRC.

scholarly journals Estimating the Tensile Strength of Ultrahigh-Performance Fiber-Reinforced Concrete Beams

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
In-Hwan Yang ◽  
Changbin Joh ◽  
The Quang Bui
Keyword(s):  
Tensile Strength ◽  
Reinforced Concrete ◽  
Material Properties ◽  
Steel Fiber ◽  
Tensile Behavior ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Experimental Result ◽  
Fiber Reinforced ◽  
The Moment

The tensile behavior of ultrahigh-performance fiber-reinforced concrete (UHPFRC) depends on the dispersion and orientation of steel fibers within the concrete matrix. The uneven dispersion of randomly oriented steel fibers in concrete may cause differences in the tensile behavior between material testing specimens and beams. Therefore, in this study, the tensile behavior was investigated by fitting the analysis result of the moment-curvature curve to the experimental result of a UHPFRC beam. To this end, three UHPFRC mixtures with different compressive strengths were fabricated to test the material properties and flexural behavior of UHPFRC beams. Both a single type of steel fiber and a combination of steel fiber types were used with volume fractions of 1.0% and 1.5%, respectively, in the three mixtures. Based on the design recommendations, the material properties of UHPFRC were modeled. The results ultimately show that by fitting the analysis results to the experimental results of the moment-curvature curves, the tensile strength of UHPFRC beams can be reasonably estimated.

scholarly journals Systematic Review on the Creep of Fiber-Reinforced Concrete

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5098
Author(s):  
Nikola Tošić ◽  
Stanislav Aidarov ◽  
Albert de la Fuente
Keyword(s):  
Reinforced Concrete ◽  
Constitutive Models ◽  
Fiber Reinforced Concrete ◽  
Single Fiber ◽  
Theoretical Research ◽  
Future Research ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Pull Out ◽  
Structural Applications

Fiber-reinforced concrete (FRC) is increasingly used in structural applications owing to its benefits in terms of toughness, durability, ductility, construction cost and time. However, research on the creep behavior of FRC has not kept pace with other areas such as short-term properties. Therefore, this study aims to present a comprehensive and critical review of literature on the creep properties and behavior of FRC with recommendations for future research. A transparent literature search and filtering methodology were used to identify studies regarding creep on the single fiber level, FRC material level, and level of structural behavior of FRC members. Both experimental and theoretical research are analyzed. The results of the review show that, at the single fiber level, pull-out creep should be considered for steel fiber-reinforced concrete, whereas fiber creep can be a governing design parameter in the case of polymeric fiber reinforced concrete subjected to permanent tensile stresses incompatible with the mechanical time-dependent performance of the fiber. On the material level of FRC, a wide variety of test parameters still hinders the formulation of comprehensive constitutive models that allow proper consideration of the creep in the design of FRC elements. Although significant research remains to be carried out, the experience gained so far confirms that both steel and polymeric fibers can be used as concrete reinforcement provided certain limitations in terms of structural applications are imposed. Finally, by providing recommendations for future research, this study aims to contribute to code development and industry uptake of structural FRC applications.

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