Chemo-mechanical finite element model of deterioration of plain concrete structures

• Autorzy: Romanowski P. , Cichoń C.

Warianty tytułu

PL

Chemo-mechaniczny model skończenie elementowy zniszczenia konstrukcji betonowej w płaskim stanie naprężenia

• Języki publikacji: EN

Abstrakty

EN

The degradation of mechanically loaded plain concrete structures under two deterioration mechanism: chlorides diffusion and calcium dissolution, with the influence of the moisture transport in concrete, are considered. It is assumed that the concrete behavior is initially isotropic and described by two scalar damage variables, independently for compression and tension loading conditions. The chemical degradation of concrete is described by means of an additional internal variable, named environmental damage. This damage variable consists with two internal variables which are the measure of deterioration of concrete caused by chloride and calcium ions actions. The usefulness of the proposed method of FE numerical analysis is verified by two examples.

PL

W pracy rozważana jest degradacja konsrtukcji betonowej, pod stałym obciążeniem mechanicznym, poddana dwu mechanizmom zniszczenia: dyfuzji chlorków i wymywania jonów wapnia, z uwzględnieniem transportu wilgoci w betonie. Założone zostało izotopowe początkowo zachowanie betonu i opisane dwoma parametrami zniszczenia, niezależnie dla ściskania i rozciągania. Chemiczna degradacja betonu opisana została przy użyciu dodatkowej zmiennej, nazywanej "parametrem zniszczenia środowiskowego". Na wartość tej zmiennej składają się dwie zmienne będące miarami zniszczenia betonu spowodowanego działaniem chlorków i jonów wapnia. Użyteczność proponowanej skończenie elementowej analizy została zweryfikowana na dwu przykładach.

Słowa kluczowe

EN

concrete; damage; environmental damage; finite element method

PL

konstrukcja betonowa; zniszczenie; model chemo-mechaniczny; model elementów skończonych; zniszczenie środowiskowe; chlorki; jon wapnia

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2005
• Tom: Vol. 51, nr 1
• Strony: 85--106
• Opis fizyczny: Bibliogr. 26 poz., il.

Twórcy

autor

Romanowski P.

• Rzeszów University, Faculty of Mathematics and Natural Science, Institute of Mathematics

autor

Cichoń C.

• Kielce University of Technology, Faculty of Management and Computer Modelling, Chair of Applied Computer Science

Bibliografia

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