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Tensile strength of varied-angle mortise and tenon connections in timber frames / Johnn P. Judd in Journal of structural engineering, Vol. 138 N° 5 (Mai 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 5 (Mai 2012) . - pp.636–644. Titre : Tensile strength of varied-angle mortise and tenon connections in timber frames Type de document : texte imprimé Auteurs : Johnn P. Judd, Auteur ; Fernando S. Fonseca, Auteur ; Carson R. Walker, Auteur Année de publication : 2012 Article en page(s) : pp.636–644. Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Timber  frame  Wood  connections  Wood  joints  Yield  modes Résumé : The tensile strength of varied-angle mortise and tenon connections in timber frames is discussed in this paper. Twelve full-size mortise and tenon connections (four 90°, four 67.5°, and four 45°) were tested under monotonic tensile loading. Initial yield modes observed during testing included peg bending, peg shear, tenon tear out, and mortise splitting. Decreased connection angle corresponded to equal or increased tensile strength but decreased ductility. A theoretical method to calculate the tensile strength of mortise and tenon connections is also developed. The method uses a modified set of yield-limit equations supplemented with local-stress-effect (mortise splitting and row tear out) equations to predict tensile strength. The governing theoretical yield modes agree well with yield modes observed during testing. The theoretical tensile strength is reasonably accurate, averaging 14% higher to 9% lower compared with test results. The findings indicate that mortise and tenon connections are significantly stronger when the tenon is oriented radially with respect to the mortise grain, especially in orthogonal connections. As a consequence, tangential loading of the mortise should be avoided. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000468 [article] Tensile strength of varied-angle mortise and tenon connections in timber frames [texte imprimé] / Johnn P. Judd, Auteur ; Fernando S. Fonseca, Auteur ; Carson R. Walker, Auteur . - 2012 . - pp.636–644. Génie civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 5 (Mai 2012) . - pp.636–644. Mots-clés : Timber  frame  Wood  connections  Wood  joints  Yield  modes Résumé : The tensile strength of varied-angle mortise and tenon connections in timber frames is discussed in this paper. Twelve full-size mortise and tenon connections (four 90°, four 67.5°, and four 45°) were tested under monotonic tensile loading. Initial yield modes observed during testing included peg bending, peg shear, tenon tear out, and mortise splitting. Decreased connection angle corresponded to equal or increased tensile strength but decreased ductility. A theoretical method to calculate the tensile strength of mortise and tenon connections is also developed. The method uses a modified set of yield-limit equations supplemented with local-stress-effect (mortise splitting and row tear out) equations to predict tensile strength. The governing theoretical yield modes agree well with yield modes observed during testing. The theoretical tensile strength is reasonably accurate, averaging 14% higher to 9% lower compared with test results. The findings indicate that mortise and tenon connections are significantly stronger when the tenon is oriented radially with respect to the mortise grain, especially in orthogonal connections. As a consequence, tangential loading of the mortise should be avoided. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000468