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Discrete element method simulations of fracture in concrete under uniaxial compression based on its real internal structure

Abstrakt

The paper describes experimental and numerical results of concrete fracture under quasi-static uniaxial compression. Experimental uniaxial compression tests were performed on concrete cubic specimens. Fracture in concrete was detected at the aggregate level by means of three non-destructive methods: three-dimensional X-ray microcomputed tomography, two-dimensional scanning electron microscope and manual two-dimensional digital microscope. The discrete element method was used to directly simulate experiments. Concrete was modelled as a random heterogeneous four-phase material composed of aggregate particles, cement matrix, interfacial transitional zones and macrovoids based on experimental images. Two- and three-dimensional analyses were carried out. In two-dimensional analyses, the real aggregate shape was created by means of clusters of spheres. In three-dimensional calculations, spheres were solely used. A satisfactory agreement between numerical and experimental results was achieved in two-dimensional analyses. The model was capable of accurately predicting complex crack paths and the corresponding stress–strain responses observed in experiments.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS nr 27, strony 578 - 607,
ISSN: 1056-7895
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Suchorzewski J., Tejchman-Konarzewski A., Nitka M.: Discrete element method simulations of fracture in concrete under uniaxial compression based on its real internal structure// INTERNATIONAL JOURNAL OF DAMAGE MECHANICS. -Vol. 27, iss. 4 (2018), s.578-607
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1177/1056789517690915
Weryfikacja:
Politechnika Gdańska

wyświetlono 224 razy

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