Design and performance prediction of timber bridges based on a factorization approach

Meyer-Veltrup, Linda; Brischke, Christian; Niklewski, Jonas; Hansson, Eva Frühwald

doi:10.1080/17480272.2018.1424729

Cited by 20 publications

(21 citation statements)

References 9 publications

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“…A new concept for characterizing the durability of wood-based materials and predicting the service life of wood was recently proposed by Meyer-Veltrup et al [13,14], based on the material-inherent protective properties, the moisture performance and the climate-and design-induced exposure dose of wooden structures. This approach has been successfully applied to untreated wood [15][16][17] and was validated on historical objects from WWII made of spruce wood [54].…”

Section: Modelling Decay Rates Of Treated and Modified Woodmentioning

confidence: 99%

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The Performance of Wood Decking after Five Years of Exposure: Verification of the Combined Effect of Wetting Ability and Durability

Humar

Kržišnik

Lesar

et al. 2019

Forests

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Wood is one of the most important construction materials, and its use in building applications has increased in recent decades. In order to enable even more extensive and reliable use of wood, we need to understand the factors affecting wood’s service life. A new concept for characterizing the durability of wood-based materials and for predicting the service life of wood has recently been proposed, based on material-inherent protective properties, moisture performance, and the climate- and design-induced exposure dose of wooden structures. This approach was validated on the decking of a model house in Ljubljana that was constructed in October 2013. The decay and moisture content of decking elements were regularly monitored. In addition, the resistance dose DRd, as the product of the critical dose Dcrit, and two factors taking into account the wetting ability of wood (kwa) and its inherent durability (kinh), were determined in the laboratory. DRd correlated well with the decay rates of the decking of the model house. Furthermore, the positive effect of thermal modification and water-repellent treatments on the outdoor performance of the examined materials was evident, as well as the synergistic effects between moisture performance and inherent durability.

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Section: Modelling Decay Rates Of Treated and Modified Woodmentioning

confidence: 99%

“…Material resistance dose D Rd and MC data for k inh and k wa calculated based on the Meyer-Veltrup et al (2018) methodology[14].…”

mentioning

confidence: 99%

The Performance of Wood Decking after Five Years of Exposure: Verification of the Combined Effect of Wetting Ability and Durability

Humar

Kržišnik

Lesar

et al. 2019

Forests

Self Cite

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“…Regarding timber bridges, durability was identified as another critical issue to be considered in the conceptual design [7][8][9][10]. In [11], it is shown how the lack of a preliminary durability design can lead to early decay, i.e., after less than ten years of service life.…”

Section: Conceptual Designmentioning

confidence: 99%

Some Shape, Durability and Structural Strategies at the Conceptual Design Stage to Improve the Service Life of a Timber Bridge for Pedestrians

2020

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The use of wood in the construction of bridges has increased in recent decades thanks to the characteristics of this material, i.e., environmentally-friendly and suitability within natural landscapes. Nevertheless, timber constructions may be affected by degrading effects due to biological and/or abiotic agents, and may be exposed to impacts or vibrations due to external forces such as wind, earthquakes or walking pedestrians. Consequently, bridge performance with respect to these aspects should be assessed from the early design stage. Within this context, in this study, some shape, structural and durability strategies dealing with the design of timber bridges for pedestrians are investigated in order to extend the service life of these constructions. More precisely, a methodology consisting of three steps, to be applied at the early conceptual design stage, is proposed. The three fundamental steps to be considered in the preliminary design of timber bridges are: (i) main boundary constraints and load-bearing system; (ii) durability; (iii) vibration levels. In the study, the presented methodology is applied and described for the design of a pedestrian and cyclist timber bridge over the Gravina torrent, in Apulia (Italy).

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“…In addition, it can be used to study the effect of different climates on the moisture conditions and to estimate moisture distributions over time. Ultimately, such a model should be implemented in a durability design framework, following the methodology described by Meyer-Veltrup et al (2018).…”

Section: Introductionmentioning

confidence: 99%

The effects of joints on the moisture behaviour of rain exposed wood: a numerical study with experimental validation

Niklewski

Fredriksson

2019

Wood Material Science & Engineering

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Joints in timber structures are particularly vulnerable to degradation due to their tendency to trap moisture. The mechanisms involved, and their effect on the moisture conditions of wood, are here investigated numerically. The horizontal member of a rail and post-type configuration is modelled numerically by a two-dimensional diffusion model with material properties for Norway spruce. Contact areas are assumed to be fully wetted when the specimen is exposed to free water but are unable to interact with the ambient air. Water that is absorbed through such areas cannot dry out through the same surface and is instead redistributed. The model was validated against experimental data, both previously unpublished data and data obtained from the literature, including both laboratory and outdoor exposure. The numerical solutions were, in general, consistent with the measured data. The model provides a simple, yet accurate, method to estimate the moisture conditions in certain types of wood joints. In addition, the spatial distribution of time spent above 25% moisture content was calculated, in order to investigate the suitability of the model for durability applications. ARTICLE HISTORY

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Design and performance prediction of timber bridges based on a factorization approach

Cited by 20 publications

References 9 publications

The Performance of Wood Decking after Five Years of Exposure: Verification of the Combined Effect of Wetting Ability and Durability

The Performance of Wood Decking after Five Years of Exposure: Verification of the Combined Effect of Wetting Ability and Durability

Some Shape, Durability and Structural Strategies at the Conceptual Design Stage to Improve the Service Life of a Timber Bridge for Pedestrians

The effects of joints on the moisture behaviour of rain exposed wood: a numerical study with experimental validation

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