Proposta de método para mapeamento de danos de patrimônios edificados com o auxílio de câmera termográfica infravermelha: estudo de caso da sede centro da UTFPR Curitiba

Abstract

Built heritage must be preserved and conserved with attention to its historical and cultural condition while taking account of inspection bodies’ demands. In this regard, the building survey and the record of its preservation conditions are essentials for a restoration project, and they must be held as complete as possible. However, there is not a direct and disseminated method that leads to this purpose. This work aims to propose a damage mapping method for cultural heritages, with the assistance of infrared thermography (IRT) alongside another investigation proceedings. This research is based on the case study of the historic buildings of the center head office of the Federal University of Technology of Paraná, in which this method was applied in order to develop the buildings’ restoration proposal. For this purpose, some auxiliary forms were designed for each step of the damage mapping, acting as a guide for the fieldwork and, thereafter, for the analysis and results consolidation. Concerning the use of thermography in damage mapping, to obtain the emissivity properties of the material and the thermographic images, some variables such as the distance from the object and the time of inspection, were explored. Even though the analysis carried out was the qualitative one, it was clear the importance of the emissivity on the temperature images’ quality; of the photographic registration at each moment of thermographic inspection, and of the knowledge about the expected temperature patterns for a specific study case, for an effective interpretation. It was perceived that the termogram’s qualitative analysis was successfully accomplished, given the recognition of some possible damages and of an intervention, which was unrecognizable by tactile, visual, and photographic inspections, even if it was evident the complementary role of the thermography to the other sources of investigation. Thus, with this work, a method was developed, grounded on practices already consolidated and also attending the current standards about the subject, intended to be used on other similar cases, enlarging, on time, the technical possibilities that come to contribute to this legacy preservation.