| Autor: |
Nogueira RS; Department of Structural Engineering, São Carlos School of Engineering, University of São Paulo, Av. Trabalhador São Carlense, 400 Centro, São Carlos 13566-590, SP, Brazil., Moritani FY; Department of the Civil Engineering (FCTUC), University of Coimbra, Rua Luís Reis Santos-Pólo II, 3030-788 Coimbra, Portugal., Christoforo AL; Department of the Civil Engineering-UFSCAR, Federal University of São Carlos, Rodovia Washington Luís, km 235-SP-310, São Carlos 13565-905, SP, Brazil., Monteiro SN; Materials Science Department, Military Institute of Engineering (IME), Praça General Tibúrcio, 80 Urca, Rio de Janeiro 22290-270, RJ, Brazil., de Azevedo ARG; Civil Engineering Laboratory (LECIV), Science and Technology Center, North Fluminense State University Darcy Ribeiro, Av. Alberto Lamego, 2000-Parque Califórnia, Campos dos Goytacazes 28013-602, RJ, Brazil., Dos Santos HF; Campus of Ariquemes, Federal Institute of Education, Science and Technology of Rondônia (IFRO), Av. Juscelino Kubitschek, 2717-2853 Setor Industrial, Ariquemes 76870-000, RO, Brazil., Lahr FAR; Department of Structural Engineering, São Carlos School of Engineering, University of São Paulo, Av. Trabalhador São Carlense, 400 Centro, São Carlos 13566-590, SP, Brazil. |
| Abstrakt: |
Tensile perpendicular to grain is an important mechanical property in the design of joints in timber structures. However, according to the standards, this strength can be determined using at least two different methods: uniaxial tensile and three-point static bending. In this context, the present paper aims to investigate the influence of these test methods on the determination of tensile strength perpendicular to grain of wood used in civil construction timber. Three wood species from Brazilian planted forests ( Pinus spp., Eucalyptus saligna , and Corymbia citriodora ) were used in this investigation. Twelve specimens of each species were used for each test method investigated. Moreover, a statistical analysis was performed to propose an adjustment to the equation of the Code of International Organization for Standardization 13910:2014 for the three-point bending test. Tensile strength values perpendicular to grain obtained from the uniaxial tensile test were significantly higher than those determined by the three-point bending test. It is proposed that the tensile strength perpendicular to grain can be determined more precisely with adoption of coefficient 5.233 in the term [(3.75·Fult)/b·Lh] of the equation specified by the Code of International Organization for Standardization 13910:2014 for the three-point bending test. |
