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Continuous and Discontinuous Modelling of Fracture in Concrete Using FEM (Paperback, 2013 ed.)
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Continuous and Discontinuous Modelling of Fracture in Concrete Using FEM (Paperback, 2013 ed.)
Series: Springer Series in Geomechanics and Geoengineering
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Total price: R2,846
Discovery Miles: 28 460
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The book analyzes a quasi-static fracture process in concrete and
reinforced concrete by means of constitutive models formulated
within continuum mechanics. A continuous and discontinuous
modelling approach was used. Using a continuous approach, numerical
analyses were performed using a finite element method and four
different enhanced continuum models: isotropic elasto-plastic,
isotropic damage and anisotropic smeared crack one. The models were
equipped with a characteristic length of micro-structure by means
of a non-local and a second-gradient theory. So they could properly
describe the formation of localized zones with a certain thickness
and spacing and a related deterministic size effect. Using a
discontinuous FE approach, numerical results of cracks using a
cohesive crack model and XFEM were presented which were also
properly regularized. Finite element analyses were performed with
concrete elements under monotonic uniaxial compression, uniaxial
tension, bending and shear-extension. Concrete beams under cyclic
loading were also simulated using a coupled elasto-plastic-damage
approach. Numerical simulations were performed at macro- and
meso-level of concrete. A stochastic and deterministic size effect
was carefully investigated. In the case of reinforced concrete
specimens, FE calculations were carried out with bars, slender and
short beams, columns, corbels and tanks. Tensile and shear failure
mechanisms were studied. Numerical results were compared with
results from corresponding own and known in the scientific
literature laboratory and full-scale tests.
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