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Experimental evaluation of different strengthening techniques of traditional ti...
Branco, Jorge M.; Piazza, Maurizio; Cruz, Paulo J. S.A series of monotonic and cyclic tests were performed on unstrengthened specimens, in order to characterize the original behavior of connections, representative of traditional timber trusses. Subsequently, connections strengthened with metal devices were tested under monotonic and cyclic loading. Test data of original connections has been gathered with the purpose of characterizing their behavior, in particular...
Experimental analysis of laterally loaded nailed timber-to-concrete connections
Branco, Jorge M.; Cruz, Paulo J. S.; Piazza, MaurizioThis work intends to assess the accuracy of the methodology proposed in the Eurocode 5 for laterally loaded nailed timber-to-concrete connections. First, the adequacy of the methodology proposed by Eurocode 5 for the dowel-type fasteners is analyzed and discussed, using timber elements from Pinus pinaster Ait. Square and round smooth nails have been used, initially on push-out tests of single and double shear d...
Structural analysis of two King-post timber trusses : non-destructive evaluatio...
Branco, Jorge M.; Piazza, Maurizio; Cruz, Paulo J. S.The misunderstanding of the overall behaviour of traditional timber trusses can result in incorrect strengthening interventions or, frequently, on their replacement. Timber roof structures need a more concise knowledge of the real behaviour to determine internal loads and control the load transfer. For that, laboratory tests on scaled or full-scale specimens of members, connections and trusses are needed. In th...
Diagnosis and analysis of two king-post trusses
Branco, Jorge M.; Cruz, Paulo J. S.; Piazza, MaurizioAn accurate geometric and mechanical evaluation of two king-post trusses, based in grading results with data gathered from NDT as well as from mechanical evaluation, followed by full-scale tests were performed. The trusses were reassembled in laboratory and submitted to a series of cyclic tests under symmetric and asymmetric loading. Strengthening techniques evaluated in precedents research steps were used in a...
Analisi sperimentale su collegamenti tradizionali e rinforzati nelle capriate l...
Branco, Jorge M.; Tomasi, Roberto; Parisi, Maria Adelaide; Piazza, MaurizioI giunti cosiddetti “di carpenteria” sono senza dubbio tra i più comuni utilizzati per il collegamento di elementi lignei nelle capriate storiche, presentandosi in differenti configurazioni che, comunque, si rifanno quasi sempre al tradizionale giunto a dente semplice. Sebbene tale tipo di nodo si presenti con una grande variabilità di geometria (angolo di intaglio, profondità di intaglio, lunghezza del tacco n...
Asnas de madeira : a importância da rigidez das ligações
Branco, Jorge M.; Cruz, Paulo J. S.; Piazza, MaurizioO presente trabalho pretende salientar a importância do conhecimento da rigidez das ligações das asnas de madeira tradicionais. Apresentam-se os resultados de uma campanha experimental sobre ligações entalhadas com dente simples. Através de ensaios monotónicos e cíclicos, analisaram-se ligações originais (não reforçadas) e estudou-se a utilização da braçadeira, do esquadro e de varões metálicos no seu reforço.
Behaviour of traditional portuguese timber roof structures
Branco, Jorge M.; Cruz, Paulo J. S.; Piazza, Maurizio; Varum, HumbertoThe aim of this paper is to present the results of a structural analysis of common trusses traditionally used in roof construction in Portugal. The study includes the results of a preliminary survey intending to assess the geometry, materials and on site pathologies, as well as a twodimensional linear elastic static and dynamic analysis. The trusses behaviour under symmetric and non-symmetric loads, the king po...
Experimental analysis of original and strengthened traditional timber connections
Branco, Jorge M.; Cruz, Paulo J. S.; Piazza, Maurizio; Varum, HumbertoTests on full-scale unstrengthened connections were performed under monotonic and cyclic loading. Attention has been principally focused on the birdsmouth joint, because of its common use in practice. Different strengthening solutions with metal elements have been evaluated.
Strengthening methodologies of portuguese traditional timber connections
Branco, Jorge M.; Piazza, Maurizio; Cruz, Paulo J. S.; Varum, HumbertoDifferent strengthening solutions with metal elements have been experimentally evaluated with tests on full-scale connections. Attention has been focused on the birdsmouth joints, due to its common use in practice. Even if unstrengthened, these types of connections reveal significant moment resistance. Experimental results show that structural response of birdsmouth connections under cyclic loading cannot be re...
Modelling of timber joints in traditional structures
Branco, Jorge M.; Cruz, Paulo J. S.; Piazza, Maurizio; Varum, HumbertoOriginal unstrengthened timber connections and the effects of different strengthening techniques have been evaluated experimentally with tests on full-scale birdsmouth joints. Experimental results show that structural response of traditional timber connections under cyclic loading cannot be represented by common constraint models, like perfect hinges or rigid joints, but should be using semi-rigid and friction ...
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