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Reliability analysis of a timber truss system subjected to decay
Brites, Ricardo D.; Neves, L. C.; Machado, J. S.; Lourenço, Paulo B.; Sousa, Hélder S.Assessing the safety of existing timber structures is of paramount importance for taking reliable decisions on repair actions and their extent. The results obtained through semi-probabilistic methods are unrealistic, as the partial safety factors present in codes are calibrated considering the uncertainty exhibited by new structures. In order to overcome these limitations, and also to include the e ects of deca...
In situ measured cross section geometry of old timber structures and its influe...
Lourenço, Paulo B.; Sousa, Hélder S.; Brites, Ricardo D.; Neves, L. C.Old timber structures may show significant variation in the cross section geometry along the same element, as a result of both construction methods and deterioration. As consequence, the definition of the geometric parameters in situ may be both time consuming and costly. This work presents the results of inspections carried out in different timber structures. Based on the obtained results, different simplified...
Avaliação da segurança de cobertura tradicional de madeira sujeita a degradação...
Brites, Ricardo D.; Neves, L. C.; Machado, J. S.; Lourenço, Paulo B.O presente trabalho propõe-se apresentar a modelação probabilística de uma estrutura-tipo de uma cobertura tradicional de madeira, sendo tomadas como variáveis aleatórias as dimensões geométricas das secções transversais, as propriedades mecânicas da madeira e as acções aplicadas à estrutura, dando especial ênfase ao vento e neve. Depois de estabelecido o índice de fiabilidade β para uma situação de não degrada...
Probabilistic maintenance and optimization strategies for deteriorating civil i...
Frangopol, D. M.; Neves, L. C.In developed countries, civil infrastructures are one of the most significant investments of governments, corporations, and individuals. Among these, transportation infrastructures, including highways, bridges, airports, and ports, are of huge importance, both economical and social. Most developed countries have built a fairly complete network of highways to fit their needs. As a result, the required investment...
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