American Society of Civil Engineers


Poro-Damage Approach Applied to Hydro-Fracture Analysis of Concrete


by Benoît Bary, (Assoc. Prof., Lab. de Mécanique et Tech., ENS Cachan/CNRS/Univ. Paris VI, 61 ave. du président Wilson, 94235 Cachan Cedex, France. Mailing address: Lab. de Génie Civ. et d’Urbanisme, Univ. de Marne-La-Vallée, 2 allée A. Einstein, 77420 Champs/Marne, France. E-mail: benoit.bary@univ-mlv.fr), Jean-Pierre Bournazel, (Assoc. Prof., Lab. de Mécanique et Tech., ENS Cachan/CNRS/Univ. Paris VI, 61 ave. du président Wilson, 94235 Cachan Cedex, France), and Eric Bourdarot, (Res. Engr., EDF/CNEH, Savoie Technolac,73373 Le Bourget du Lac Cedex, France)

Journal of Engineering Mechanics, Vol. 126, No. 9, September 2000, pp. 937-943, (doi:  http://dx.doi.org/10.1061/(ASCE)0733-9399(2000)126:9(937))

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Document type: Journal Paper
Abstract: An approach using mechanics of saturated porous media is presented to model strongly coupled hydromechanical effects in concrete. Fracture mechanisms of the matrix are taken into account by introducing a tensorial damage variable, which makes it possible to describe orthotropic damage states as well as their effects on hydromechanical parameters (permeability and Biot tensor). An experimental procedure, allowing simultaneous control of pore pressure and applied stresses in a concrete specimen, leads to the identification of material parameters introduced in the constitutive model. This model is implemented in the finite-element code CASTEM 2000; numerical simulations of a hydraulic fracture test are then performed and show that the damage-dependence of hydraulic parameters has significant influence on the global response of the structure.


ASCE Subject Headings:
Concrete
Cracking
Fluid-structure interactions
Hydromechanics
Porous media