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Monitoring of timber bridges by repeatedly measuring the natural frequency

  • Measuring the natural frequency of buildings and bridges is a possibility to get information about the stiffness of the construction. Decreasing stiffness can be detected be repeatedly measurements. Damaged parts of the construction or too high wood moisture can be reasons for decreasing stiffness. The earlier the failure is detected the better is the chance to repair it with low costs. The method of monitoring by repeatedly measuring the natural frequency is applied at timber bridges, especially on footbridges. As damages due to high wood moisture cannot be seen easily, measuring the natural frequency is a good possibility to detect them and then to repair them. Equations to calculate the natural frequencies regarding the damaged parts are shown and applied to a simple supported beam.

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Author:Patricia HammGND, Jörg SchänzlinGND, Wolfgang FranckeGND, Stefan Scheuble
Parent Title (English):WCTE 2016 : World Conference on Timber Engineerng : August 22-25, 2016, Vienna, Austria
Document Type:Conference Proceeding
Year of Publication:2016
Release Date:2018/11/21
Tag:Measurements; Natural frequency; Timber bridges; Footbridges; Damages
First Page:4676
Last Page:4683
Open Access?:Ja