Correlação de imagens digitais em ensaios de prismas de alvenaria estrutural com blocos cerâmicos de paredes maciças

Abstract

Due to the fact that civil construction is still an outdated area in terms of technology, new constructive means are gradually emerging that seek to make up this deficiency. Structural masonry, despite being a rationalized constructive method, still suffers from some limitations, including the difficulty in being analyzed as a monolithic structure, making it difficult to analyze tensions as a whole. Digital image correlation appears as a solution to this problem, offering an image analysis in a non-invasive way, allowing the study of the structure as a whole. This work was carried out in order to evaluate the use of the DIC method by the GOM Correlate software in compression tests on structural masonry prisms with ceramic blocks with solid walls, laid with industrialized mortars of 2, 6 and 12 MPa, and also to evaluate the influence of mortar strength on the prism failure method. With the data obtained from the footage and processing by the software, it was possible to verify that the resistance of the mortar affects the way the prism breaks, making the break more fragile when a strong mortar is used, and less fragile when a weak mortar is used, also showing joint crushing in these cases, and that the DIC method is valid for use in testing, being comparable to the use of LVDTs in the reading of stresses and strains, and removing the need for contact with the specimen.