Exploring the shear behavior of masonry triplets via digital image correlation, damage quantification and Mohr-Coulomb criterion identification

Shear properties are essential for evaluating the strength of masonry infill walls. Traditionally, shear strength parameters are experimentally determined through triplet shear tests. While extensive research exists on these tests, few studies have combined full-field measurement techniques such as Digital Image Correlation (DIC) with mesoscopic damage analysis and shear strength quantification. Leveraging the detailed displacement fields provided by DIC and force measurements, the study seeks to enhance the characterization of the Mohr-Coulomb criterion in mortar joints. An experimental campaign on eight specimens yields valuable insights through force-displacement curves and DIC post-processing in a monoview configuration. This analysis proposes a novel method to achieve a more precise estimation of triplet shear strength.