Damages mapping of façade using Aerophotogrammetry and Thermography Inspection: Zoroastro Artiaga Museum – Art Deco in Brazil

Abstract

Inspecting historic buildings with non-destructive techniques can contribute to obtaining information about the in-service status of a given building without damaging its parts. Damages map prepared by digital photogrammetry and the application of façade Thermography assessment are non-destructive techniques and possible due to technological advances. The present work aimed to apply non-destructive inspection techniques of the façade on the Zoroastro Artiaga Museum, of Art Deco Architecture, using two techniques: generation of damages map by orthoimage created from Aerophotogrammetry and the method of Damage Factor, and application of the thermographic image analysis technique. For the generation of damages map, the relevance of using UAV was observed, since for this technique it is essential to use this equipment to capture images perpendicular to the plane of the façade, when thinking about using the method by Dense Stereo Matching. The damages map generation and the analysis of the Damages Factor allowed the quantification of the incidence of pathological manifestations. The analysis of thermographic images made it possible to understand which factors contributed to the emergence of pathological manifestations, such as the possible presence of excess moisture, favoring, for example, the formation of efflorescence. It is concluded that the application of these techniques can be safely used for inspection and prior diagnosis and that the Thermography was important to identify non-visible damages to the façade, such as moisture extensions, since it was not possible to visually delimit the entire existing area of moisture through damages map generated by Aerophotogrammetry.