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Characterization of cross sections from old chestnut beams weakened by decay
Sousa, Hélder S.; Branco, Jorge M.; Lourenço, Paulo B.This work aims to experimentally assess the material properties of old chestnut (Castanea sativa Mill.) cross sections weakened by decay. Specimens were taken from critical zones of twenty floor beams, mostly corresponding to their ending parts, in contact with granite masonry walls. These specimens were compared with clear wood specimens taken from non-decayed parts . The experimental campaign comprised of vi...
Dimensional variation of three softwood due to hygroscopic behavior
Silva, Catarina V.; Branco, Jorge M.; Camões, Aires; Lourenço, Paulo B.With the aim of monitor the hygroscopic behavior of three softwood species in situations of changes in its moisture content, an experimental program based on dimensional measurements, hygrometer readings and weightings procedure, was carried out. Maritime Pine (Pinus pinaster), Spruce (Picea abies) and Scots Pine (Pinus sylvestris) specimens were evaluated and compared. For each wood species, half of specimens ...
Guidelines to improve sustainability and cultural integration of temporary hous...
Félix, Daniel; Branco, Jorge M.; Feio, A. O.Unfortunately, natural disasters have drastically increased over the last decades causing extensive material and non-material damages. The destruction of houses and the number of homeless people are some of the most visible effects of post-disaster scenarios. Housing is one of the people’s most important needs and it is also essential for their well-being. After a disaster it is crucial to supply temporary a...
On the use of NDT data for reliability-based assessment of existing timber stru...
Sousa, Hélder S.; Sørensen, John D.; Kirkegaard, Poul H.; Branco, Jorge M.; Lourenço, Paulo B.The objective of this paper is to address the possibilities of using non-destructive testing (NDT) data for updating information and obtaining adequate characterization of the reliability level of existing timber structures and, also, for assessing the evolution in time of performance of these structures when exposed to deterioration. By improving the knowledge upon the mechanical properties of timber, better a...
Casas de madeira : da tradição aos novos desafios
Branco, Jorge M.De um modo geral, Portugal, aparte de muitos países europeus, ainda não se encontra totalmente sensibilizado para o uso da madeira como parte integral da construção de edifícios. Num mercado fortemente tradicional no uso de alvenaria e betão, essa tendência parece estar a mudar, gradualmente, dadas as vantagens inerentes ao uso da madeira. O desenvolvimento tecnológico da indústria da madeira propiciou o aparec...
Temporary housing after disasters : a state of the art survey
Félix, Daniel; Branco, Jorge M.; Feio, A. O.The number of natural disasters has drastically increased, causing great damages on buildings. A large number of houses have suffered damage and become unusable, causing a high number of homeless people. Housing reconstruction programmes play a decisive role on the disaster recovery and providing temporary housing is a crucial step of these programmes. During the reconstruction of permanent housing, it allows v...
Glulam mechanical characterization
Sousa, Hélder S.; Branco, Jorge M.; Lourenço, Paulo B.The glued laminated timber (glulam) mechanical properties may be evaluated through the determination of the key mechanical properties of the lamellae that compose that element. Simple bending and tension parallel to the grain tests were performed in order to assess the strength class of three glulam elements. Regarding the bending tests, 8 samples were taken from a glulam beam and assessed. Values for the resis...
Bond between glulam and NSM CFRP laminates
Sena-Cruz, José; Jorge, Marco; Branco, Jorge M.; Cunha, Vitor M. C. F.With the aim of evaluating the bond behaviour between glulam and carbon fibre reinforced polymer laminates strips, an experimental program using pull-out tests was carried, when the near-surface strengthening technique is applied. Two main variables were studied: the bond length and the type of pull-out test configuration. The instrumentation included the loaded and free-end slips, as well as the pull-out force...
Avaliação em laboratório do comportamento térmico de soluções construtivas em m...
Oliveira, Marco A.; Silva, Sandra Monteiro; Branco, Jorge M.; Bragança, L.; Lourenço, Paulo B.O presente trabalho apresenta a avaliação do comportamento térmico de quatro soluções construtivas integralmente em madeira, recorrendo à previsão e análise experimental do seu desempenho térmico. Foram avaliadas quatro soluções construtivas representativas do mercado, três delas tendo por base troncos de madeira e uma outra do tipo entramado de madeira. As principais tipologias de habitações que se encontram n...
Avaliação experimental do comportamento sísmico de casas de madeira
Lourenço, Paulo B.; Branco, Jorge M.; Mendes, N.; Costa, A. C.; Candeias, PauloAs casas de madeira estão a ter um desenvolvimento rápido na Europa devido a aspetos tais como a sustentabilidade e o elevado grau de industrialização e prefabricação, que se traduzem em facilidade e rapidez de montagem. Os sistemas mais tradicionais de estruturas de madeira e os sistemas inovadores recentes são agora aplicados não apenas no norte da Europa mas, crescentemente, no sul da Europa, onde a perigosi...
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