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Análise experimental de paredes de alvenaria de pedra tradicional face a explosões
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A ação explosiva, apesar de não frequente, pode ser catastrófica quando ocorre, uma vez que pode conduzir ao colapso de uma estrutura. Esta consequência adquire particular relevância nas estruturas não dimensionadas para esta ação, que é o caso de uma parte subs-tancial das estruturas/construções com paredes resistentes de alvenaria tradicional.
Com o objetivo de compreender o comportamento das paredes de alvenaria de pedra tradicional face a explosões, no âmbito do projeto PTDC/ECI-EST/31046/2017 - PROTEDES - Proteção de Edifícios Estratégicos Contra Explosões, realizaram-se dois tipos de ensaios expe-rimentais, utilizando, em cada um, dos muretes. No primeiro tipo de ensaios, ambos os mure-tes foram submetidos a três explosões, de modo a analisar a pressão incidente e refletida. O segundo tipo de ensaios, consistiu em analisar a resistência à compressão axial dos dois muretes após terem sido sujeitos às referidas ações explosivas.
Nos resultados desta dissertação é possível observar a comparação dos perfis das ondas de choque, valores de pressão de pico incidente e pressão de pico refletida, obtidos experimentalmente através de sensores de pressão incidente e pressão refletida, com os valores teóricos, assim como a comparação dos resultados das flechas dos muretes com os valores esperados através de métodos de cálculo teóricos. Relativamente aos ensaios em compressão axial efetuou-se a comparação entre os resultados experimentais com os obtidos em muretes ensaiados anteriormente.
Explosive action, although not frequent, can be catastrophic when it occurs since it can cause a structure to collapse. This consequence has great relevance for structures that were not designed for this action, which is the case for a substantial number of structures with traditional masonry walls. Therefore, in order to understand the behavior of traditional stone masonry walls when faced with explosions, within the scope of the project PTDC/ECI-EST/31046/2017 - PROTEDES - Proteção de Edifícios Estratégicos Contra Explosões, two types of experimental tests were carried out, each one using two walls. In the first type of tests, both walls were subjected to three explosions with the objective of analyzing the incident and reflected pressure. The se-cond type of tests consisted of analyzing the resistance to an axial compression of the two walls after being subjected to the explosive action. In the results of this dissertation it's possible to observe the comparison of the shock wave profiles and the incident peak pressure and reflected peak pressure values, which were obtained experimentally through sensors of incident and reflected pressure, with the theore-tical values, as well as the comparison of the deflection results with those expected through theoretical calculation methods. Regarding the axial compression tests, a comparison is made between the experimental results and other results obtained with walls tested previously.
Explosive action, although not frequent, can be catastrophic when it occurs since it can cause a structure to collapse. This consequence has great relevance for structures that were not designed for this action, which is the case for a substantial number of structures with traditional masonry walls. Therefore, in order to understand the behavior of traditional stone masonry walls when faced with explosions, within the scope of the project PTDC/ECI-EST/31046/2017 - PROTEDES - Proteção de Edifícios Estratégicos Contra Explosões, two types of experimental tests were carried out, each one using two walls. In the first type of tests, both walls were subjected to three explosions with the objective of analyzing the incident and reflected pressure. The se-cond type of tests consisted of analyzing the resistance to an axial compression of the two walls after being subjected to the explosive action. In the results of this dissertation it's possible to observe the comparison of the shock wave profiles and the incident peak pressure and reflected peak pressure values, which were obtained experimentally through sensors of incident and reflected pressure, with the theore-tical values, as well as the comparison of the deflection results with those expected through theoretical calculation methods. Regarding the axial compression tests, a comparison is made between the experimental results and other results obtained with walls tested previously.
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Paredes de alvenaria de pedra tradicional Ação explosiva Resistência à com-pressão axial