Vibration-based Structural Health Monitoring is an ongoing field of research in many engineering disciplines. As for civil engineering, plenty of experimental structures have been erected in the past decades, both under laboratory and real-life conditions. Some of these facilities became a benchmark for different kinds of methods associated with Structural Health Monitoring such as damage analysis and Operational Modal Analysis, which led to fruitful developments in the global research community. When it comes to the continuous monitoring and assessment of the structural integrity of mechanical systems exposed to environmental and operational variability, the robustness and adaptability of the applied methods is of utmost importance. Such properties cannot be fully evaluated under laboratory conditions, which highlights the necessity of outdoor measurement campaigns. To this end, we introduce a test facility for Structural Health Monitoring comprising a lattice tower exposed to realistic conditions and featuring multiple reversible damage mechanisms. The structure located near Hanover in Northern Germany is densely equipped with sensors to capture the structural dynamics. The environmental conditions are monitored in parallel. The obtained continuous measurement data can be accessed online in an open repository. That is the foundation for benchmarks, consisting of a growing data set that enables the development, evaluation, and comparison of Structural Health Monitoring strategies and methods. In this article, we offer a documentation of the test facility and the data acquisition system. Lastly, we characterize the structural dynamics with the help of a finite element model and by analyzing several month of data.
Ingenieurbauwerke zeichnen sich u. a. durch ihre Individualität und ihre Langlebigkeit aus. Daher spielt die messtechnische Überwachung von Ingenieurbauwerken eine entscheidende Rolle. Mithilfe von Methoden der Strukturüberwachung können Veränderungen oder Schäden frühzeitig detektiert, lokalisiert und ggf. sogar quantifiziert werden. In Kombination mit einer numerischen Modellbildung können darüber hinaus Digitale Zwillinge erschaffen werden. Digitale Zwillinge bilden Bauwerke über ihr gesamtes Leben ab und können somit helfen, sowohl den Entwurf als auch den Betrieb zu optimieren. Eine Herausforderung bei der Entwicklung von Methoden der Strukturüberwachung ist deren Validierung im Zusammenhang mit realen Anwendungen. In diesem Beitrag wird daher eine Teststruktur vorgestellt, die explizit zur Validierung von Methoden der Strukturüberwachung entwickelt wurde. Die Messdaten der Struktur stehen für Forschungs‐ und Industrieanwendungen frei zur Verfügung. Zwei unterschiedliche Methoden (daten‐ und modellbasiert) zur Schadenslokalisation werden vorgestellt, verglichen und validiert.
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