The position effect of structural Eucalyptus round timber on the flexural modulus of elasticity

Engenharia Agrícola

André L Christoforo²  Túlio H Panzera¹  Fabiano B Batista¹  Paulo H. R Borges¹  Francisco A. R Lahr¹  Claudenir F Franco¹ 

[1],Universidade Federal de São João del-Rei Depto.de Engenharia Mecânica São João del-Rei MG

关键词: round timber;    bending of beams;    modulus of elasticity;    madeira roliça;    flexão de vigas;    módulo de elasticidade;   

DOI  :  10.1590/S0100-69162011000600019

来源: SciELO

【 摘 要 】

Round timber has great use in civil construction, performing the function of beams, columns, foundations, poles for power distribution among others, with the advantage of not being processed, such as lumber. The structural design of round timber requires determining the elastic properties, mainly the modulus of elasticity. The Brazilian standards responsible for the stiffness and strength determination of round timber are in effect for over twenty years with no technical review. Round timber, for generally present an axis with non-zero curvature according to the position of the element in the bending test, may exhibit different values of modulus of elasticity. This study aims to analyze the position effect of Eucalyptus grandis round timber on the flexural modulus of elasticity. The three-point bending test was evaluated in two different positions based on the longitudinal rotation of the round timber element. The results revealed that at least two different positions of the round timber element are desired to obtain significant modulus of elasticity.

【 授权许可】

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