THERMOGRAPHY ANALYSIS FOR NON-STRUCTURAL BRICK MASONRY

Speaker:
Lorenzi, Alexandre; Universidade Federal do Rio Grande do Sul; Brazil

Authors:
Graeff, A.G.; UFRGS; Brazil
Lorenzi, A.; Universidade Federal do Rio Grande do Sul – UFRGS; Brazil
Lorenzi, L.S.; Universidade Federal do Rio Grande do Sul – UFRGS; Brazil
Reginato, L.A.; Universidade Federal do Rio Grande do Sul – UFRGS; Brazil
Silva Filho, L.C.P.D.; UFRGS; Brazil

ID: ECNDT-0413-2018
Session: Civil Infrastructure 2
Room: J1
Date: 2018-06-11
Time: 16:00 - 16:20

Due to the recent concern in the Building Fire Safety area in Brazil, especially in the most southern State of the country, Rio Grande do Sul, which was beaten by a commotion wave since the Kiss night club fire in 2013 (killing 242 people), new legislations and standards have been developed. The academic and technical areas are joining efforts to improve the fire safety of buildings and researches have been developed to provide information for legislations and standards. In this context, it is important to understand the fire resistance of non-structural brick masonries, since they are commonly used for wall sealing in reinforced concrete structures, especially in fire escape routes, where a high fire resistance is required. An important concern for brick masonry is to determine the fire resistance time of the walls during a fire situation in order to control the time to evacuate the building. Since standard tests to determine the fire resistance of brick masonry are expensive and time consuming, this paper presents an alternative solution to determine the quality of structural masonry during a fire simulation using thermography analysis and reduced scale elements. The technique comprises in exposing reduced scale brick masonry walls (800 mm high x 800 mm wide with different brick dimensions) to a temperature controlled oven to simulate a fire situation. The output results are in terms of time to propagate the heat through the thickness of the wall considering the various brick configurations, the propagation of cracks, the heat distribution along the wall surface and the fire resistance time. The experimental results demonstrate that the thermography technique is capable of providing precise and complete information on the fire resistance of non-structural brick masonry, even if a reduced scale wall is used.