Effect of nondestructive testing of laminations on the bending properties of glulam beams made from louro-vermelho (Sextonia rubra)

CERNE

Teles, Ricardo Faustino¹  Souza, Mário Rabelo de³  Del Menezzi, Cláudio Henrique Soares²  Souza, Frederico de⁴ 

[1] Faculdade da Terra de Brasília, Brasília, Brazil$$;Universidade de Brasília, Brasília, Brazil$$;Serviço Florestal Brasileiro - SCEN, Brasília, Brazil$$;Instituto de Ciências Agrárias, Mineiros, Brazil$$

关键词: Transverse vibration;    glued laminated timber;    static bending.;   

DOI  :  10.1590/S0104-77602010000100009

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

This work aims to assess the bending properties of glued laminated timber beams (glulam) manufactured with species louro-vermelho (Sextonia rubra). Laminations were nondestructively tested using the transverse vibration method (E_Mlam). Then 10 glulam beams were manufactured and tested in static bending according to ASTM D 198 standard, having modulus of elasticity (E_M), modulus of rupture (f_M), and bending moment (M) determined. The finished beams were also tested by the transverse vibration method (E_Mvt). It was noted that the E_Mvt value was only 2% lower than the E_M value. Using laminations with a high modulus of elasticity did allow effective gain in stiffness. Therefore, results indicate that the transverse vibration method is a valid, reliable technique both for testing glulam laminations and for assessing stiffness in finished beams. Bending properties in glulam beams were influenced by the stiffness of constituent laminations.

【 授权许可】

Unknown