Acoustic wave velocity in long pieces of Salzmann pine for in-situ structural assessment

Osuna-Sequera, Carlos; Llana, Daniel F.; Hermoso, Eva; Martitegui, Francisco Arriaga

doi:10.1016/j.conbuildmat.2020.121256

Cited by 7 publications

(1 citation statement)

References 15 publications

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“…As a first observation, the two measuring points (end-to-end and lateral faces) agreed satisfactorily: the end-to-end velocity was on average 3% higher than the face velocity. A similar ratio between the two methods was reported previously in pine [35,36] and spruce [37].…”

Section: Calculation Of the Dynamic Modulus Of Elasticitysupporting

confidence: 87%

Density Estimation by Drilling Resistance Technique to Determine the Dynamic Modulus of Elasticity of Wooden Members in Historic Structures

Brunetti

Aminti

Vicario

et al. 2023

Forests

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(1) The assessment of the mechanical properties of old timber is essential for the proper maintenance of wooden structures. (2) Among the non-destructive properties, the dynamic modulus of elasticity is one of the best predictors of the mechanical characteristics of the members, but it requires the determination of wood density to be determined. (3) Thus, wood density was estimated by drilling resistance measurements, developing species-specific prediction equations for silver fir, chestnut and poplar. (4) The estimated density was combined with the stress wave velocity propagating longitudinally through the wooden piece, and the dynamic modulus of elasticity was calculated. (5) Medium-high coefficient determinations (R2 from 0.79 to 0.94) were found for density estimation, and medium coefficient determinations (R2 from 0.53 to 0.60) were found for the estimation of the static modulus of elasticity using the dynamic modulus.

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Section: Calculation Of the Dynamic Modulus Of Elasticitysupporting

confidence: 87%

Density Estimation by Drilling Resistance Technique to Determine the Dynamic Modulus of Elasticity of Wooden Members in Historic Structures

Brunetti

Aminti

Vicario

et al. 2023

Forests

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A Review of the Applicability of Non-destructive Testing for the Determination of the Fire Performance of Reused Structural Timber

Uldry,

Husted,

Pope

et al. 2024

J Nondestruct Eval

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This paper presents a review of the possible methods for testing the fire performance properties of reused timber through non-destructive techniques, focusing on structural elements. Evaluating the fire performance of old wooden specimen is necessary to facilitate reuse, in the support of the transition to a circular economy. The use of non-destructive methods minimizes damages to the pieces during the evaluation process. Three angles are reviewed: (1) The properties of wood influencing fire performance, (2) the change of wood properties over time, and (3) the known non-destructive tests. Some properties of wood are known to influence the fire performance, e.g., the density. Of these, there is no evidence of irreversible changes due to the passage of time only. The many different non- and semi- destructive techniques that can be applied to wood seldom relate to these properties, but rather to mechanical properties or geometry. Additionally, accurate measurements are often difficult, while some are only done in laboratories. This review concludes that currently there is no known non-destructive method that permits to estimate the fire performance of a reused timber element compared to a new one. There is a gap of knowledge on the evolution of the fire properties of timber during the use phase of the building, and there are no established methods to test for these properties without destroying a significant portion of the element. Development of non-destructive test methodologies to assess fire properties of timber will expand the market for reused timber to include load carrying timber.

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In situ assessment of the timber structure of an 18th century building in Madrid, Spain

Arriaga

Osuna-Sequera

Esteban

et al. 2021

Construction and Building Materials

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Acoustic wave velocity in long pieces of Salzmann pine for in-situ structural assessment

Cited by 7 publications

References 15 publications

Density Estimation by Drilling Resistance Technique to Determine the Dynamic Modulus of Elasticity of Wooden Members in Historic Structures

Density Estimation by Drilling Resistance Technique to Determine the Dynamic Modulus of Elasticity of Wooden Members in Historic Structures

A Review of the Applicability of Non-destructive Testing for the Determination of the Fire Performance of Reused Structural Timber

In situ assessment of the timber structure of an 18th century building in Madrid, Spain

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