Effects of Beetle Attack on the Bending and Compression Strength Properties of Pine Wood

Helena Cruz; José S. Machado

doi:10.4028/www.scientific.net/AMR.778.145

Paper Titles

XVIII Century Wooden Stretchers Structure Designed for Large Canvas and an Example of the Assessment Method
p.113

Antique Wooden Floor Construction Solutions and the Possibilities of Using them in Reconstructions
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Wooden Boards Arches Roofs in Late Nineteenth-Century Industrial Architecture: Conservation Problems
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In Situ Evaluation of the Reference Properties of Structural Timber Members. Use of Available Tools and Information
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Effects of Beetle Attack on the Bending and Compression Strength Properties of Pine Wood
p.145

Prediction of Strength and Elasticity in Oak Beams on the Basis of External Wood Characteristics
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Mechanical and Fungicidal Properties of approximately 100 Years Old Oak, Beech and Spruce Wood Beams
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Non-Destructive Tests and Bending Tests on Chestnut Structural Timber
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Effectiveness and Subjectivity of Visual Inspection as a Method to Assess Bending Stiffness and Strength of Chestnut Elements
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 778Effects of Beetle Attack on the Bending and...

Effects of Beetle Attack on the Bending and Compression Strength Properties of Pine Wood

Abstract:

One major difficulty one has to face in the assessment of old timber structures concerns the assessment of the effective strength of timber cross sections with biological damage.Its effects may generally be considered, either by assuming a reduced cross section or by assuming reduced mechanical properties for the apparent cross section.Where beetles attack produce a “diffuse” damage, i.e. their tunnels spread in most of the cross section surrounded by a significant amount of undamaged wood, the assumption of a reduced cross section may not be the best approach.To assess the effect of diffuse damage by beetles to pine timber, damaged timber was collected from an old structure and tested in bending and compression in small “clear” wood specimens (cross sections of 2cm x 2cm). The varied degrees of biological damage were assessed in terms of the “holes” area measured in the cross section surface with the help of image processing analysis. Bending and compression strength were correlated with biological damage. Test results suggest that, although very high levels of insect destruction have an impact on the timber strength, timber density still is the governing factor.

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Periodical:

Advanced Materials Research (Volume 778)

Pages:

145-151

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.778.145

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Online since:

September 2013

Authors:

Helena Cruz, José S. Machado

Keywords:

Boringbeetles, Damage, Density, Mechanical Property, Timber Structure

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References

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