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Comportement des assemblages mixtes bois-métal avec trous oblongs

Abstract : Nowadays, hybrid structures are common because of architectural and environmental reasons. In that context, timber steel structures are very relevant because they combine lightness with large slenderness. However, combining both timber that presents a hydroscopic behavior and steel material that is not, raises a problem of cracking in connection zone. Indeed, the large number of connectors in this part of the structure prevents timber from swelling and shrinkage deformations and then creates cracks. In order to limit the effect of the connection on the cracking of the timber, the present work proposes to release degrees of freedom using slotted holes in steel plates in bolted timber-steel connections. Due to the lack of studies on bolted cover plate with slotted holes, a large part of this work proposes to analyze the behavior of such connections based an experimental study using full field measurement technique. The first part of the present work allows to better understanding the behavior of bolted cover plate with slotted holes using load-displacement curves, failure modes and strain analyses obtained with Digital Image Correlation (DIC) technique. This analysis highlights the presence of two types of behaviors. The first one is mostly due to the bending of the end distance area whereas the second is due to bearing. Thereafter, an analytical model predicting the initial stiffness of such connections is proposed. This model is based on numerical and experimental results obtained by DIC. In the last part of the study, an experimental campaign is dedicated to the evaluation of the effect of the presence of slotted holes in steel plate of bolted timber-steel connection under bending moment. The result of the study shows that using slotted holes has no negative impact on the short-time behavior of bolted timber steel connections and, in certain circumstance, an increase of the resistance is observed.
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Submitted on : Tuesday, September 8, 2020 - 9:06:11 AM
Last modification on : Wednesday, September 9, 2020 - 3:29:39 AM


Version validated by the jury (STAR)


  • HAL Id : tel-02932933, version 1


Edouard Cavène. Comportement des assemblages mixtes bois-métal avec trous oblongs. Génie civil. Université Clermont Auvergne, 2019. Français. ⟨NNT : 2019CLFAC087⟩. ⟨tel-02932933⟩



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