Embedment Strength of Pinus sp. Wood to Metal Pins

Abstract:

To know the physical and mechanical properties of wood to be employed as structural elements in is an important factor for its use in a rational way. The connections between members of timber structures are also relevant topic once local stress concentrations can occur and safety must be seriously taken in account. Brazilian Code ABNT NBR 7190: 1997 "Design of Timber Structures" provides guidelines for connections calculation based on two alternative limit states: wood strength to embedment or bending of the bolt. The purpose of this paper is estimate the strength to embedment of Pinus sp. to bolts in three directions with respect to the grain: parallel, perpendicular and inclined at 45o. Specimens obeying requirements of Brazilian Code related to bolts diameter (10mm) were prepared and tested. The embedment strength in parallel direction to the fiber was the highest and the failure modes were more frequent crushing and cleavage.

• Periodical: Advanced Materials Research (Volumes 884-885)
• Pages: 653-656
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.884-885.653
• Online since: January 2014
• Authors: Diego Henrique Henrique de Almeida*, Tiago Hendrigo Hendrigo de Almeida, Julio Cesar Molina, Fabiane Salles Ferro, Andre Luis Christofóro, Francisco Antonio Rocco Lahr
• Keywords: Embedment Strength, Pinus sp, Timber Structures, Wood, Wood Properties

References

[1] ABNT NBR 7190: 1997. Design of Structure of Timber. Rio de Janeiro, (1997).

[2] M. A. M. Oliveira, Connections with metal dowels in timber structures, São Carlos, 2001, 119 p. (Masters's Dissertation, School of Engineering of São Carlos, USP).

[3] G. C. Stamato, Embedment strength of plywood, São Carlos, 1998, 135 p. (Masters's Dissertation, School of Engineering of São Carlos, USP).

[4] P. A. O. Almeida, Connections nailed timber, São Paulo, 1987, 174 p. (Masters's Dissertation, Polytechnic School of São Paulo, USP).

[5] P. A. O. Almeida, Large Timber Structures, São Paulo, 1990, 280 p. (Doctor's Thesis, Polytechnic School of São Paulo, USP).

[6] D. H. Almeida, Analysis of embedment and compression strengths for Pinus and Eucalipto woods, Itapeva, 2011, 101 p. (Graduate Monograph, Paulista Estate University, UNESP).

[7] A. Valle, Stiffness of connections of bolts in glued laminated timber structures, São Paulo, 1999, 193 p. (Doctor's Thesis, Polytechnic School of São Paulo, USP).

[8] N. H. P. Ribeiro, Experimental evaluation of embedment strength of wood, Guimarães, 2010. (Masters's Dissertation, Minho University, UNIMINHO).

[9] C. L. Santos, A. M. P. Morais, J. J. L. Morais, J. L. P. C. Lousada, Bearing properties of Portuguese Pine wood a laterally loaded dowel, Science and Technology of Materials, 20 (2008) 45- 51.

[10] G. C. Stamato, Embedment strength of plywood, Books of Structures Engineering. EESC. 18 (2002) 49-76.

[11] G. C. Stamato, Connections on timber structures with plywoods, São Carlos, 2002, 137 p. (Doctor's Thesis, School of Engineering of São Carlos, USP).

[12] E. R. M. A. Queirós, Behavior of reinforced connections with bolt in timber structures, Vila Real, 2009. (Masters's Dissertation, Trás-os-Montes e Alto Douro University, UTAD).

DOI: 10.14571/brajets.v15.nse1.150-165