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Advisor(s)
Abstract(s)
A construção em estrutura de aço leve (LSF) ganhou espaço nos últimos anos na Europa como uma alternativa mais eficiente e barata que a construção convencional, ainda atingindo altos padrões. No entanto, o efeito de pontes térmicas causado pela alta condutividade térmica da estrutura de aço pode ser uma desvantagem. Perda de calor em excesso ou isolamento acústico deficiente estão relacionados ao comportamento do envelope de edifícios. Portanto, no projeto destes sistemas é necessária uma grande atenção em termos de desempenho térmico e acústico, para dar aos ocupantes o conforto desejado. Neste trabalho, a influência da estrutura de aço, do material de vedação e da densidade e espessura do material isolante no desempenho de isolamento térmico e acústico do LSF paredes internas são estudadas. O comportamento do isolamento acústico e térmico são avaliados com recurso de softwares, nomeadamente INSUL e THERM, respetivamente. As avaliações foram feitas utilizando o índice ponderado de redução de som, Rw, e o valor U. Com este trabalho pretende-se fornecer orientações que possam contribuir para um dimensionamento eficaz de paredes internas em LSF. Verificou-se que para o bom isolamento acústico, o elemento de vedação é o principal componente e para o bom isolamento térmico, a espessura do material isolante e do elemento de vedação são os principais fatores. Do modelo mais simples ao mais robustos verificou-se reduções da ordem de 33% do valor de Rw e 80% do valor U.
Light Steel Frame construction (LSF) has gained ground in recent years in Europe as a more efficient and cheaper alternative to conventional construction, still reaching high standards. However, the thermal bridging effect caused by the high thermal conductivity of the steel structure can be a disadvantage. Excessive heat loss or poor sound insulation are related to the behavior of the building envelope. Therefore, in the design of these systems, great attention is needed in terms of thermal and acoustic performance, in order to provide the occupants with the desired comfort. In this work, the influence of the steel structure, the sealing material and the density and thickness of the insulating material on the thermal and acoustic insulation performance of LSF internal walls are studied. The behavior of acoustic and thermal insulation is evaluated using software, namely INSUL and THERM, respectively. The evaluations were made using the weighted sound reduction index, Rw, and the U value. With this work it is intended to provide guidelines that can contribute to an effective design of internal walls in LSF. It was found that for good acoustic insulation, the sealing element is the main component and for good thermal insulation, the thickness of the insulating material and the sealing element are the main factors. From the simplest to the most robust models, reductions of the order of 33% of the Rw value and 80% of the U value were verified.
Light Steel Frame construction (LSF) has gained ground in recent years in Europe as a more efficient and cheaper alternative to conventional construction, still reaching high standards. However, the thermal bridging effect caused by the high thermal conductivity of the steel structure can be a disadvantage. Excessive heat loss or poor sound insulation are related to the behavior of the building envelope. Therefore, in the design of these systems, great attention is needed in terms of thermal and acoustic performance, in order to provide the occupants with the desired comfort. In this work, the influence of the steel structure, the sealing material and the density and thickness of the insulating material on the thermal and acoustic insulation performance of LSF internal walls are studied. The behavior of acoustic and thermal insulation is evaluated using software, namely INSUL and THERM, respectively. The evaluations were made using the weighted sound reduction index, Rw, and the U value. With this work it is intended to provide guidelines that can contribute to an effective design of internal walls in LSF. It was found that for good acoustic insulation, the sealing element is the main component and for good thermal insulation, the thickness of the insulating material and the sealing element are the main factors. From the simplest to the most robust models, reductions of the order of 33% of the Rw value and 80% of the U value were verified.
Description
Mestrado de dupla diplomação com a UTFPR - Universidade Tecnológica Federal do Paraná
Keywords
Lighweight steel framing Eficiência térmica Eficiência acústica Isolamento de paredes