MOE and MOR assessment of in service and dismantled old structural timber

Cavalli, Alberto; Bevilacqua, L.; Capecchi, Gianluca; Cibecchini, Daniele; Fioravanti, Marco; Goli, Giacomo; Togni, Marco; Uzielli, Luca

doi:10.1016/j.engstruct.2016.06.054

Cited by 19 publications

(9 citation statements)

References 13 publications

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“…Based on Figure 3, the most significant factor affecting the reusability of the building structural elements is the mechanical properties of the component (D23). This observation is in line with the attempts of some researchers to estimate the mechanical properties of the load-bearing components as an indicator of reusability [19,22,60].…”

Section: Improving the Transparency Of The Selected Rf Modelsupporting

confidence: 89%

“…In a relevant study focused on estimating the mechanical properties of timber, [22] developed linear regression models to predict the Modulus of Elasticity and Modulus of Rupture of in-use and recovered timber sections based on the NDT methods. According to this study, the developed models can assess the reusability of timber structures on site.…”

Section: Introductionmentioning

confidence: 99%

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Predicting the technical reusability of load-bearing building components: A probabilistic approach towards developing a Circular Economy framework

Rakhshan

Morel

Daneshkhah

2021

Journal of Building Engineering

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Section: Improving the Transparency Of The Selected Rf Modelsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Predicting the technical reusability of load-bearing building components: A probabilistic approach towards developing a Circular Economy framework

Rakhshan

Morel

Daneshkhah

2021

Journal of Building Engineering

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“…Researches on quantitatively predicting timber physical and mechanical properties by NDT parameters can be found in Kloiber, et al (2015) and Cavalli and Togni (2013) for pin penetration test, Nowak, et al (2016) for resistance drilling tests, Ruy, et al (2018), Morales-Conde and Machado (2017), and Salmi, et al (2013) for ultrasound test, and Kawamoto, et al (2002) and Lamy et al (2015) for acoustic emission test. However, concluding that the various types of decay, which are frequently present in existing timber structures, would significantly influence the NDT results and their accuracy on the prediction of timber properties, researches started to focus on the influence of the conservation state of old timber elements such as in Gomes, et al (2016), Cavalli, et al (2016), Zhong, et al (2017, and Zhang, et al (2015). Moreover, decay assessment using NDTs was researched in Branco et al (2017) and Sousa et al (2017) where, through the use of damage maps, it was possible to pinpoint regions of the structure and even of segments of the elements which had different levels of decay and their probable sources.…”

Section: Introductionmentioning

confidence: 99%

Combination of non-destructive tests for assessing decay in existing timber elements

Tao

Sousa

Branco

2019

Nondestructive Testing and Evaluation

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Existing timber structures often present elements with different levels of decay and the choice to maintain them comes from the structural assessment, made by a civil engineer on the basis of the results coming from the on-site survey . The choice may also rely on visual inspection combined non-destructive tests. In that case, the choice to maintain an element will greatly depend on the accuracy and reliability of the results obtained through these tests. This work aims to assess the properties of timber elements through non-destructive tests, using resistance drilling, pin penetration, ultrasound, and acoustic emission tests. The tests were carried out on three timber elements from two old timber roof trusses. The results are analysed regarding the specimen size and the use of multiple non-destructive test parameters. Decay was initially identified by means of visual inspection and different levels of decay were identified taking into account their influence on the non-destructive test results and on the predictability of models based on single and multiple regression analysis. Moreover, the obtained classification was found to increase the reliability on the prediction of density.

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“…The technology used in this investigation is that of stress waves, a non-destructive method which has proved its efficiency for the mechanical characterization of structural elements of wood (Li et al, 2015;Dahle et al, 2016;Kloiber et al, 2016;Chen and Guo, 2017). This focus is complementary to other techniques and methods to assure the structural reliability of wood edifications with historical and cultural value (Machado area of intervention et al, 2011;Kránitz et al, 2014;Arangjelovski et al, 2015;Feio and Machado, 2015;Henriques and Neves, 2015;Kloiber et al, 2015;Sousa et al, 2015;Zhang et al, 2015;Cavalli et al, 2016a;Cavalli et al, 2016b;Milch et al, 2016;Sousa et al, 2017;Barozzi et al, 2018;Walsh-Korb and Avérous. 2018).…”

Section: Introductionmentioning

confidence: 99%

Structural Analysis of Wood Beams by Non-Destructive Methods in Restoration Works of the Cathedral of Morelia, Mexico

Gómez

Castellanos

González

2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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<p><strong>Abstract.</strong> In the ceiling framework of the capitular hall of the Cathedral of Morelia, the overall state of the beams of the ceiling framework of the capitular hall of the Cathedral of Morelia was diagnosed as deplorable, for which a replacement was put underway for more recently sawed beams. The focus of this investigation was to determine the humidity content of the wood, its density, the wave velocity, the dynamic modulus and the quality factor of a sample of five new beams. These parameters were compared to the medium of five old beams. For the density, wave velocity, dynamic modulus and rigidness, there were no differences found between the old and new beams. The results suggest that the mechanical and physical properties of the new wood beams are equivalent to those of the older ones. Consequently, the strategy of substituting old and deteriorated wood beams for recently sawed ones was successful and complies with the requirements of the International Council of Monuments and Sites as referred to in the principles for the preservation of historical wooden structures.</p>

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MOE and MOR assessment of in service and dismantled old structural timber

Cited by 19 publications

References 13 publications

Predicting the technical reusability of load-bearing building components: A probabilistic approach towards developing a Circular Economy framework

Predicting the technical reusability of load-bearing building components: A probabilistic approach towards developing a Circular Economy framework

Combination of non-destructive tests for assessing decay in existing timber elements

Structural Analysis of Wood Beams by Non-Destructive Methods in Restoration Works of the Cathedral of Morelia, Mexico

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