Numerical modeling of steel fiber reinforced concrete with a discrete and explicit representation of steel fibers
| Autor: | Túlio Nogueira Bittencourt, Luís A.G. Bitencourt, Osvaldo L. Manzoli, Frank J. Vecchio |
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| Přispěvatelé: | Universidade de São Paulo (USP), Universidade Estadual Paulista (Unesp), University of Toronto |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Constitutive equation Truss Steel fiber 02 engineering and technology Fiber-reinforced concrete law.invention 0203 mechanical engineering law Shear stress General Materials Science Damage constitutive model Impl-Ex integration scheme Crack propagation business.industry Applied Mathematics Mechanical Engineering Computability Isotropy Structural engineering 021001 nanoscience & nanotechnology Condensed Matter Physics Finite element method Nonlinear system 020303 mechanical engineering & transports Mechanics of Materials Modeling and Simulation Coupling finite element 0210 nano-technology business Concrete |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 0020-7683 |
| Popis: | Made available in DSpace on 2019-10-06T15:20:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-03-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) This work presents a novel numerical model based on the use of coupling finite elements to simulate the behavior of steel fiber reinforced concrete (SFRC) with a discrete and explicit representation of steel fibers. The material is described as a composite made up by three phases: concrete, discrete discontinuous fibers and fiber-matrix interface. The steel fibers are modeled using two-node finite elements (truss elements) with a one-dimensional elastoplastic constitutive model. They are positioned using an isotropic uniform random distribution, considering the wall effect of the mold. A non-rigid coupling procedure is proposed for modeling the complex nonlinear behavior of the fiber-matrix interface by adopting an appropriate constitutive damage model to describe the relation between the shear stress (adherence stress) and the relative sliding between the matrix and each fiber individually. An isotropic damage model including two independent scalar damage variables for describing the concrete behavior under tension and compression is considered. To increase the computability and robustness of the continuum damage models used to simulate matrix and interface behavior, an implicit-explicit integration scheme is used. Numerical examples involving a single fiber and a cloud of fibers are performed. Comparisons with experimental results demonstrate that the application of the numerical strategy for modeling the behavior of SFRC is highly promising and may constitute an important tool for better understanding the effects of the different aspects involved in the failure process of this material. University of São Paulo Av. Prof. Luciano Gualberto, Trav. 3 n. 380 - CEP - 05508-010 São Paulo State University - UNESP/Bauru, Av. Eng. Luiz Edmundo C. Coube 14-01 Department of Civil Engineering University of Toronto, 35 St. George St., M5S 1A4 São Paulo State University - UNESP/Bauru, Av. Eng. Luiz Edmundo C. Coube 14-01 FAPESP: 2009/07451-2 FAPESP: 2012/05430-0 CNPq: 2016-5 CNPq: 429552 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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