000004787 001__ 4787
000004787 005__ 20141119144553.0
000004787 04107 $$aeng
000004787 046__ $$k2002-06-02
000004787 100__ $$aBary, Benoît
000004787 24500 $$aCOUPLED HYDRO-MECHANICAL AND DAMAGE MODEL FOR CONCRETE AS AN UNSATURATED POROUS MEDIUM

000004787 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004787 260__ $$bColumbia University in the City of New York
000004787 506__ $$arestricted
000004787 520__ $$2eng$$aThe long-term behavior of concrete is largely dependent, in many applications of civil engineering, of the transfer phenomena of the fluid phases filling the pores, which are governed by diffusion and permeation processes (shrinkage, creep). In this study the concrete is described as a porous medium made up of two phases (solid and liquid) in interaction by using the mechanics of isothermal unsaturated porous media. Two isotropic damage variables are introduced in the formulation for reproducing the degradations appearing in tension and compression, as well as their effects on the hydro-mechanical coupling parameters. The main transfer phenomenon is assumed to be controlled essentially by pore water pressure gradients, and consequently the capillary pressure, related to the saturation degree via the desorption isotherm curve, defines the state of the liquid phase. Under this hypothesis the governing equations are established in function of the capillary pressure in the case of the drying shrinkage of concrete. The analogy between the proposed simplified formulation and the more classical problem of a saturated porous medium is briefly analyzed.

000004787 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004787 653__ $$aunsaturated porous medium, concrete, damage

000004787 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004787 720__ $$aBary, Benoît
000004787 8560_ $$ffischerc@itam.cas.cz
000004787 8564_ $$s617248$$uhttps://invenio.itam.cas.cz/record/4787/files/336.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004787 962__ $$r4594
000004787 980__ $$aPAPER