Papers

@article{bello_non-contact_2025,

title = {Non-contact strain measurement of loading-unloading splitting test on concrete},

author = {Ismail Bello and George Wardeh and Belén González-Fonteboa and Fernando Martínez-Abella},

url = {https://www.inderscienceonline.com/doi/abs/10.1504/IJMRI.2025.146257},

doi = {10.1504/IJMRI.2025.146257},

issn = {2056-9459},

year  = {2025},

date = {2025-01-01},

urldate = {2025-01-01},

journal = {International Journal of Masonry Research and Innovation},

volume = {10},

number = {3-5},

pages = {458–472},

publisher = {Inderscience Publishers},

abstract = {The exact modelling of reinforced concrete structures necessitates a thorough control of post-cracking behaviour and the evolution of plastic deformations of concrete during loading-unloading cycles. Conducting a direct tensile test is more complex than the other tests, like the splitting test. This study investigates using the splitting test with digital image correlation (DIC) technique to analyse concrete deformation. By filming and processing images of splitting cylindrical specimens using GOM Correlate software, full stress-strain curves up to failure are obtained. Strain gauges are also employed for comparison. Results are validated against an analytical model, showing good agreement between stress-strain curves from both methods. The study concludes that DIC offers several advantages over conventional methods, including enhanced post-peak data acquisition and the ability to monitor cracks individually, regardless of their location on the surface. This approach improves the understanding of post-cracking behaviour and the evolution of plastic deformation in concrete structures.},

keywords = {analytical modelling, concrete, DIC, digital image correlation, splitting test, stress-strain analysis},

pubstate = {published},

tppubtype = {article}

}

@article{bello_characterization_2023,

title = {Characterization of concrete behavior under cyclic loading using 2D digital image correlation},

author = {Ismail Bello and Belén González-Fonteboa and George Wardeh and Fernando Martínez-Abella},

url = {https://www.sciencedirect.com/science/article/pii/S2352710223018892},

doi = {10.1016/j.jobe.2023.107709},

issn = {2352-7102},

year  = {2023},

date = {2023-11-01},

urldate = {2023-11-01},

journal = {Journal of Building Engineering},

volume = {78},

pages = {107709},

abstract = {The development of plastic deformations of concrete during loading-unloading cycles and post-cracking behavior must be carefully controlled for accurate modeling of concrete structures. This study aims to validate the use of digital image correlation (DIC) for characterizing concrete behavior under loading-unloading conditions. Experimental tests were conducted on cubic and cylindrical concrete specimens, employing strain gauges and DIC methods. Uniaxial compressive static and loading-unloading tests were performed on two series of concrete with different compressive strengths to establish stress-strain relationships. The experimental results demonstrated good agreement between strain gauges and DIC measurements in the elastic range for both cylindrical and cubic specimens. Analytical and numerical modeling further confirmed the accuracy of permanent strains obtained through DIC for the cubic specimens subjected to cyclic loading beyond the elastic domain. Based on these findings, it can be concluded that the DIC technique is reliable for tracking strain evolution up to the point of material failure under uniaxial loading-unloading compression.},

keywords = {concrete, digital image correlation, Loading-unloading compression, Modelling, stress-strain analysis},

pubstate = {published},

tppubtype = {article}

}