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Size effect in concrete under splitting tension

Abstrakt

The size effect is a fundamental phenomenon in concrete materials. It denotes that both the nominal structural strength and material ductility always decrease with increasing element size under tension. In the paper splitting tensile tests on cylindrical concrete specimens with the different diameter were carried out. Two types of the loading strip (plywood board and steel cylinder) were used. The concrete strength and ductility decreased with increasing specimen diameter. For large concrete specimens a clear snap-back occurred. The experiments were simulated with the spherical discrete element method (DEM) under two-dimensional conditions. In the calculations, concrete was assumed as a four-phase composite material including aggregate, cement matrix, interfacial transitional zones (ITZs) and macro-voids. The process of micro- and macro-cracking was studied in detail for various failure modes. The macroscopic curves and shapes of cracks were directly compared with the laboratory test outcomes.

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Informacje szczegółowe

Kategoria:
Aktywność konferencyjna
Typ:
materiały konferencyjne indeksowane w Web of Science
Tytuł wydania:
Computational Modelling of Concrete Structures strony 437 - 445
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Suchorzewski J., Tejchman-Konarzewski A..: Size effect in concrete under splitting tension, W: Computational Modelling of Concrete Structures, 2018, CRC Press/Balekma,.
Weryfikacja:
Politechnika Gdańska

wyświetlono 40 razy

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