Fracture Processes of Concrete
Despite tremendous advances made in fracture mechanics of concrete in recent years, very little information has been available on the nature of fracture processes and on reliable test methods for determining parameters for the different models. Moreover, most texts on this topic discuss numerical modeling but fail to consider experimentation. This book fills these gaps and synthesizes progress in the field in a simple, straightforward manner geared to practical applications.
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SETTING THE STAGE
STRUCTURE OF CEMENT AND CONCRETE
MECHANICAL BEHAVIOUR OF CONCRETE
MODELLING AS A TOOL FOR TEST INTERPRETATION
VALIDATION OF MODEL PARAMETERS
aggregate and matrix aggregate particles analysis applied axial Bazant behaviour of concrete biaxial bond boundary conditions brittle Chapter composite compressive strength computed continuum crack band crack growth crack opening crack patterns crack tip criterion cylinder deformation develop deviatoric discussed displacement effect Equation example experimental experiments failure contour fibres Fictitious Crack Model fracture energy fracture law fracture mechanics fracture process hardened cement paste high strength concrete hydration increase interface interfacial transition zone kind permission lattice model LEFM length linear elastic loading platen London/New York LVDTs lytag material structure measured meso-level microcracks mode mortar multiaxial normal notch observed parameters peak Poisson's ratio porosity portland cement post-peak principal stress RILEM rock rotating Section shown in Figure silica fume simulations softening diagram specimen steel platens stiffness strain strain gauges stress-deformation stress-strain curves surface techniques teflon tensile strength tensile stress tension triaxial uniaxial compression uniaxial tensile test w/c ratio Young's modulus
Page 416 - Schlangen, E, and van Mier, JGM (1992). "Experimental and numerical analysis of micromechanisms of fracture of cement-based composites," Cement & Concrete Composites, Vol 14, pp 105-1 18.
Page 411 - Carpinteri, A. and Ferro, G., Apparent tensile strength and fictitious fracture energy of concrete: A fractal geometry approach to related size effects, in Fracture and Damage of Concrete and Rock (FDCR-2), Rossmanith, HP, Ed., Chapman & Hall/E&FN Spon, London/ New York, 86, 1993.
Page 415 - The Theoretical Basis of a Method to Determine the Fracture Energy GF of Concrete.