PSI - Issue 5

P.C. Raposo et al. / Procedia Structural Integrity 5 (2017) 1086–1091 Patrícia Raposo et al. / Structural Integrity Procedia 00 (2017) 000 – 000

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Fig. 4. Strength versus extension curves resulting from the tensile tests: a) oak specimens; b) chestnut specimens (adapted from: [2]).

3. Conclusion The study of a farm with heritage value, built with traditional materials and techniques, allowed improve the knowledge about woods employed in this kind buildings, and specifically, the mechanical properties. These properties are important to be used in developing of numerical models and advanced assessment measures, keeping the identity of the buildings and allowing to transmit this to future generations. The objective of this study was to perform a series of tensile experimental tests using material from the roof wood structure of a “sequeiro” building . The study showed that the use of the DIC technique is quite efficient for measurement of the extensions in the specimens during the tensile tests. There were limitations imposed on the extraction of the roof wood structure, which conduced to some specimens having small defects, which led to some conservative results and sometimes unacceptable. In the construction of the specimens were tried to build them without defects, but it was not always possible. Also not all specimens were constructed with parallel orientation of the fibers. Based on the stress-extension curves was observed that the tensile strength parallel to fibers presents a practically linear-elastic behaviour up to rupture, exhibiting a fragile behaviour to the tensile [2].