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Caractérisation du matériau bois de structures utilisé en construction par la méthode vibratoire : une technique de mesure non destructive
| Content Provider | Semantic Scholar |
|---|---|
| Author | Assoudo, Abdoulaye Quenum, Codjo Segnon Agbando Kossou, C. T. Chitou, Naïmoulaï Sanya, Emile Adjibadé Degan, Gérard Adjovi, Codjo Edmond |
| Copyright Year | 2013 |
| Abstract | Le present article decrit une nouvelle methode non destructive de caracterisation des poutres de structures en bois. Basee sur l’excitation par vibrations, la methode developpee est fondee sur la theorie de Bernoulli et Timoshenko. Elle a ete appliquee aux types de bois lamelle-colle, Laminated Veener Lumbers ainsi qu’aux composites en I, pour les regles de conception, de calculs de dimensionnement et de suivi de leur endommagement. Sur la base d’un vaste programme experimental de caracterisation des poutres de ces differents types de bois, la comparaison des modules elastiques a ete effectuee entre les valeurs estimees par la methode vibratoire et celles fournies par la methode statique fondee sur la mesure de la fleche relative. Les resultats obtenus mettent en evidence que la mesure du module d’elasticite par la methode dynamique non destructive proposee peut etre retenue pour caracteriser les poutres en vue de la determination des niveaux de charge des essais de comportement differe et de la duree de vie, deux facteurs phenomenologiques tres importants qui, a ce jour, ne sont pas assez clarifies dans les regles regissant les calculs des poutres a base de bois de grandes dimensions. Mots-cles : vibrations, poutres de structures, duree de vie, flexion circulaire. Characterization of structural wooden beams by vibratory method : a nondestructive technique of measurement This paper describes a new non-destructive characterization method for structural wooden beams. Based on vibrations exciting, the developed method is based on Bernoulli and Timoshenko theory. It has been applied to the lamellate-stuck types, Laminated Veener Lumbers and I composites types, for their design rules, calculations and damage monitoring. Based on an extensive experimental program of beams characterization for such different wood types, comparison of elastic modulus was made between estimated values from vibrations method and those provided by the static method funded on relative arrow or flitch measurement. The obtained results show that elasticity modulus measurement with the proposed nondestructive dynamic method can be used for wood beams characterization, in view of determination of loading levels during delayed behavior testing and lifespan studying, two very important phenomenological factors that, to date, are not sufficiently clarified in the governing rules for larger wood beams calculation. Keywords : vibrations, structures’ beams, lifespan, circular bending. |
| Starting Page | 11 |
| Ending Page | 22 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| Volume Number | 9 |
| Alternate Webpage(s) | http://www.afriquescience.info/docannexe.php?id=3037 |
| Alternate Webpage(s) | https://www.ajol.info/index.php/afsci/article/download/112054/101819 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
