Analysis of the critical stress intensity factor of concrete with gravel and dolomite aggregates tested by different methods

• Autorzy: Akram Amanda , Słowik Marta , Kosior-Kazberuk Marta , Krassowska Julita

Identyfikatory

DOI

10.24425/ace.2025.155108

Warianty tytułu

PL

Analiza krytycznego współczynnika intensywności naprężeń betonu z kruszywem żwirowym i dolomitowym badanego różnymi metodami

• Języki publikacji: EN

Abstrakty

EN

The cracking resistance of concrete is of paramount importance in the context of structural integrity and stability. Therefore, analysing fracture propagation in concrete is essential to evaluate resistance to crack propagation. The critical stress intensity factor KIc is one of the most often used fracture parameters when analysing fracture processes in concrete members. The critical stress intensity factor can be evaluated through standard laboratory tests described in RILEM recommendations. Digital image correlation (DIC) is a new measurement technique that provides the possibility of determining KIc in an alternative way. However, both measurement methods are subjected to certain challenges that may affect the results obtained. The question arises of whether the measurements by the standard RILEM method and by the method based on DIC give comparable results of concrete fracture parameters. The experimental investigation presented in the research paper deals with comparing test results of KIc, which were measured by two testing methods. To determine the critical stress intensity factor of concrete, the standard method based on the three-point bend test was applied as the basic testing method, and the ARAMIS 2D system based on DIC was used as a second testing approach. Moreover, aspects such as the influence of the type of aggregate on KIc and whether the type of aggregate would make a difference when assessing the impact of the test method on the results of KIc were analysed.

PL

Badania odporności betonu na zarysowanie z punktu widzenia mechaniki pękania polegają na określeniu parametrów pękania, takich jak energia pękania (GF) czy krytyczny współczynnik intensywności naprężeń (KIc). KIc jest jednym z najczęściej stosowanych parametrów do analizy procesów pękania w elementach betonowych, na który mają wpływ między innymi rodzaj kruszywa i maksymalny wymiar ziaren kruszywa. Do wyznaczania KIc używa się standardowej metody badawczej opartej na teście trójpunktowego zginania zgodnie z normą RILEM TC-89. Nową techniką pomiarową, która daje możliwość określenia krytycznego współczynnika intensywności naprężeń w alternatywny sposób jest cyfrowa korelacja obrazu (DIC). Jednak obie metody pomiarowe podlegają pewnym ograniczeniom, które mogą wpływać na uzyskiwane wyniki. Powstaje zatem pytanie, czy na podstawie pomiarów metodą standardową i metodą opartą na DIC uzyskiwane są porównywalne wyniki parametrów pękania betonu. Badania laboratoryjne opisane w artykule dotyczą wyznaczenia krytycznego współczynnika intensywności naprężeń, zmierzonego dwiema metodami badawczymi: standardową w teście trójpunktowego zginania oraz opartą na pomiarze z użyciem cyfrowej korelacji obrazu. Ponadto przeanalizowano czy rodzaj kruszywa ma znaczenie przy ocenie wpływu metody testowej na wyniki KIc. W celu określenia krytycznego współczynnika intensywności naprężeń betonu, jako podstawową metodę badawczą zastosowano standardową metodę opisaną w zaleceniach RILEM TC-89, tj. badanie w teście trójpunktowego zginania pod cyklicznym obciążeniem z rejestracją zmian sygnału siły oraz rozwarcia wylotu szczeliny (CMOD). Jako drugą metodę badawczą zastosowano system pomiarowy ARAMIS 2D oparty na cyfrowej korelacji obrazu. Krytyczny współczynnik intensywności naprężeń betonu badano na belkach o długości 700 mm i przekroju poprzecznym 80 × 150 mm z uformowaną szczeliną początkową 50 mm w teście trójpunktowego zginania.

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2025
• Tom: Vol. 71, nr 3
• Strony: 415--430
• Opis fizyczny: Bibliogr. 29 poz., il., tab.

Twórcy

autor

Akram Amanda

• Lublin University of Technology, Faculty of Civil Engineering and Architecture, Lublin, Poland

• https://orcid.org/0000-0001-5619-2927

autor

Słowik Marta

• Lublin University of Technology, Faculty of Civil Engineering and Architecture, Lublin, Poland

• https://orcid.org/0000-0001-9627-3625

autor

Kosior-Kazberuk Marta

• Białystok University of Technology, Faculty of Civil Engineering and Environmental Sciences, Bialystok, Poland

• https://orcid.org/0000-0001-8171-2242

autor

Krassowska Julita

• Białystok University of Technology, Faculty of Civil Engineering and Environmental Sciences, Bialystok, Poland

• https://orcid.org/0000-0001-9209-1285

Bibliografia

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