Crack mechanisms in concrete – from micro to macro scale


Abstract

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.


Keywords

concrete; crack mechanisms; fictitious crack model

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Published : 2020-11-02


Słowik, M., Stroeven, P. and Akram, A. (2020) “Crack mechanisms in concrete – from micro to macro scale”, Budownictwo i Architektura, 19(4), pp. 055-065. doi: 10.35784/bud-arch.2147.

Marta Słowik 
Department of Structural Engineering; Faculty of Civil Engineering and Architecture; Lublin University of Technology; Nadbystrzycka 40, 20-618 Lublin, Poland  Poland
https://orcid.org/0000-0001-9627-3625
Piet Stroeven 
Faculty of Civil Engineering and Geosciences; Delft University of Technology; Stevinweg 1, 2628 CN Delft, the Netherlands  Netherlands
https://orcid.org/0000-0003-1283-112X
Amanda Akram  a.akram@pollub.pl
Department of Structural Engineering; Faculty of Civil Engineering and Architecture; Lublin University of Technology; Nadbystrzycka 40, 20-618 Lublin;  Poland
https://orcid.org/0000-0001-5619-2927




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