Mechanical Properties of Wood and Timber Bridge Evaluation

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Wood possesses material properties that may be significantly different from other materials normally encountered in structural design. It is necessary for the engineer to have a general understanding of the properties and characteristics that affect the strength and performance of wood in bridge applications. This paper discusses the mechanical properties of wood, including elastics properties and strength properties. Timber bridge are often exposed to harsh environment conditions. Over time, this exposure can lead to deterioration. In turn, this deterioration may lead to a loss of structural integrity that is detrimental to the structure and its users. Timber structural elements are susceptible to degradation due to environmental and loading conditions. A variety of inspection techniques can be employed to locate damage and decay in timber members in order to maintain structural performance. Methods of non-destructive techniques for timber bridges are getting more and more important. This paper presents several non-destructive methods to timber bridge structures.

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1381-1385

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July 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] Ritter, Machael A: Timber Bridge: Design, Construction, Inspection, and Maintenance. Structural Engineer United States Department of Agriculture Forest Service, Washington, DC(1990).

Google Scholar

[2] Ross R.J., DeGroot, R.C., Neison, W.J., and Lebow,P. K: The Relationship Between Stress Wave Transmission Characteristics and the Compressive Strength of Biologically Degraded Wood. Forest Products Journal, 47 (5) 89-93, (1997).

Google Scholar

[3] Bozhang, S. and Pellerin R.F. Nondestructive Evaluation of the Degree of deterioration in Wood: Stress Wave Frequency Spectrum Analysis. Proceedings of the 10th International Symposium on Nondestructive Testing of Wood, Presses Polytechniques et Universitaires Romandes, 99-115, (1996).

Google Scholar

[4] Pellerin R.F. and Galligan,W. F: Nondestructive method of grading wood materials. Canadian Patent No. 918286, (1973).

Google Scholar

[5] R. Martinez-Sala, I. Rodriguez-Abad, R. Diez Barra, R. Capuz-Lladro: Assessment of the Dielectric Anisotropy in Timber Using the Nondestructive GRE techniqu. Construction and Building Materials 38 (2013) 903-911.

DOI: 10.1016/j.conbuildmat.2012.09.052

Google Scholar

[6] M.L. Peterson, R.M. Gutkowski: Evaluation of the structural integrity of timber bridges. NDT&E International 32(1999) 43-48.

DOI: 10.1016/s0963-8695(97)00039-x

Google Scholar

[7] Bridge Asset Management: Capacity of Bremer River Timber Bridge. Department of Main Roads, Queensland.

Google Scholar

[8] Mazurek D.F., Jordan S.R., Palazzetti D.J., and Robertson G.S.: Damage Detectability in Bridge Structure by Vibrational Analysis. Proceedings of the Conference on Nondestructive Evaluation of Civil Structure and Materials, 181-193, (1992).

Google Scholar