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Shear fracture of longitudinally reinforced concrete beams under bending using Digital Image Correlation and FE simulations with concrete micro-structure based on X-ray micro-computed tomography images
Abstract
The paper presents experimental and numerical investigations of the shear fracture in rectangular concrete beams longitudinally reinforced with steel or basalt bar under quasi-static three point bending. Shear fracture process zone formation and development on the surface of beams was investigated by Digital Image Correlation (DIC) whereas thorough analyses of 3D material micro-structure, air voids, width and curvature of shear cracking were carried out by X-ray micro-computed tomography (micro-CT). Moreover, the 2D shear fracture patterns in beams were numerically simulated with the finite element method (FEM) using isotropic coupled elasto-plastic-damage constitutive model for concrete enhanced by a characteristic length of micro-structure. Concrete meso-structure was modelled as a random heterogeneous four-phase material composed of aggregate particles, cement matrix, ITZ zones and air voids on the basis of X-ray micro-CT images. Experimental and numerical results revealed a satisfactory agreement regarding to the mechanism of failure, load-bearing capacity as well as cracking pattern.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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CONSTRUCTION AND BUILDING MATERIALS
no. 274,
ISSN: 0950-0618 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Skarżyński Ł., Marzec I.: Shear fracture of longitudinally reinforced concrete beams under bending using Digital Image Correlation and FE simulations with concrete micro-structure based on X-ray micro-computed tomography images// CONSTRUCTION AND BUILDING MATERIALS -Vol. 274, (2021), s.122116-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.conbuildmat.2020.122116
- Verified by:
- Gdańsk University of Technology
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