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Author(s):	Oppel, Mike; Jahreis, Markus; Rautenstrauch, Karl
Title:
Abstract:	Die Komplexität von Ingenieurbauwerken im Holzbau nimmt ständig zu, sodass die zutreffende Abschätzung des Strukturverhaltens und der materialgerechte Entwurf Herausforderungen darstellen können. Insbesondere für die numerische Analyse der lokal begrenzten Einleitung großer Beanspruchungen im Bereich von Anschlüssen lässt sich die Finite-Elemente-Methode (FEM) vorteilhaft nutzen. Zuverlässige Ergebnisse resp. Aussagen zum Strukturverhalten und zu den Versagenskriterien erfordern eine sachgerechte Bewertung der Modellqualität, um im Spannungsfeld zwischen Modellgröße und Rechenaufwand eine bedarfsgerechte Simulation zu erstellen. Am Beispiel des Anschlusses stabförmiger Holzbauteile mittels Gewindestäben, die mit einem großvolumigen Polymerverguss im Holz verankert sind, werden nachfolgend die Mindestanforderungen an eine problemorientiert gestaltete numerische Simulation dargestellt. Ergebnisse, Zusammenhänge und die zu erzielenden Genauigkeiten zwischen Experiment und Numerik werden anschaulich gegenübergestellt. Numeric models for joints in timber engineering The complexity of civil engineering structures in timber construction is constantly increasing. As a result, the correct estimation of the structural behavior and the material-appropriate design poses a greater challenge. The finite element method (FEM) offers a particularly advantageous solution for the numerical analysis of the local impact of greater loads on and around connections and joints. Reliable results on the structural behavior and the failure criteria require an appropriate assessment of the model quality. Only then can a demand-oriented simulation be created, which takes model size and computational effort into account. The minimum requirements of a problem-oriented numerical simulation are presented below based on the example of timber element joints with cast-in threaded rods, which are anchored in the timber with a large volume of polymer grout. The results, correlations and the accurateness to be achieved between experiment and numerical analysis are demonstratively compared.
Source:	Bautechnik 94 (2017), No. 11
Page/s:	743-750
Language of Publication:	German

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