Crack mechanisms in concrete – from micro to macro scale

• Autorzy: Słowik Marta , Stroeven Piet , Akram Amanda

Identyfikatory

DOI

10.35784/bud-arch.2147

Warianty tytułu

PL

Analiza mechanizmów pękania betonu w mikro i makro skali

• Języki publikacji: EN

Abstrakty

EN

The paper discusses a fictitious crack model of concrete in tension proposed by Hillerborg. This model presents a concept that illustrates the mechanism of crack initiation and its propagation in concrete on meso-level. It has proven to be a very useful tool for practical use, for both numerical and experimental research. The model was derived from findings on crack mechanisms on more advanced micro- and macro-scale, as presented in this paper. One of the paramount issues regarding crack analysis is the influence of aggregate size on mechanical and fracture parameters of concrete, and also on micro-crack development and associated macro-crack formation. Although significant progress in recognizing crack mechanisms in concrete has been achieved, there are still some aspects that should be studied in depth, for example the role of aggregate particles on crack development. This problem is analysed in the paper as well.

PL

W pracy zaprezentowany został model rysy fikcyjnej zaproponowany przez Hillerborga do opisu betonu rozciąganego. Model ten stanowi podstawę do opisu powstawanie i propagacji rysy w betonie na poziomie meso. Jest on przydanym narzędziem w zastosowaniach praktycznych, zarówno do analiz numerycznych jak i w badaniach eksperymentalnych. Model został wyprowadzony na podstawie obserwacji mechanizmów zarysowania w skali mikro i makro. Mechanizmy te zostały opisane w pracy. Na szczególną uwagę zasługuje fakt wpływu wymiaru kruszywa na parametry wytrzymałościowe i parametry pękania betonu, a w dalszej konsekwencji na powstawanie mikrorys i tworzenie rysy właściwej. Mimo osiągnięcia znaczącego postępu w badaniach nad mechanizmami pękania w betonie, nadal istnieje wiele aspektów wymagających dalszych analiz. Należy do nich analiza wpływu uziarnienia kruszywa na rozwój zarysowania. Zagadnienie to jest również przedmiotem rozważań przedstawionych w pracy.

Słowa kluczowe

EN

concrete; crack mechanisms; fictitious crack model

PL

beton; mechanizmy pękania; model rysy fikcyjnej

• Wydawca: Wydawnictwo Politechniki Lubelskiej
• Czasopismo: Budownictwo i Architektura
• Rocznik: 2020
• Tom: Vol. 19, no 4
• Strony: 53--66
• Opis fizyczny: Bibliogr. 33 poz., fig.

Twórcy

autor

Słowik Marta

• Katedra Konstrukcji Budowlanych; Wydział Budownictwa i Architektury; Politechnika Lubelska; ul. Nadbystrzycka 40, 20-618 Lublin Polska

autor

Stroeven Piet

• Faculty of Civil Engineering and Geosciences; Delft University of Technology; Stevinweg 1, 2628 CN Delft, the Netherlands Polska

autor

Akram Amanda

• Katedra Konstrukcji Budowlanych; Wydział Budownictwa i Architektury; Politechnika Lubelska; ul. Nadbystrzycka 40, 20-618 Lublin Polska

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).