Im Rahmen dieser Arbeit wird eine leistungsfähige Klebverbindung für den Anschluss von Kreishohlprofilen im Stahlbau entwickelt. Insbesondere werden dabei die Randbedingungen und Anforderungen des Bauwesens berücksichtigt. Das Tragverhalten der geklebten Verbindung wird anhand experimenteller und numerischer Untersuchungen bestimmt und analysiert. Die Entwicklung und Validierung einer Methodik zur Prognose der Tragfähigkeit geklebter Anschlüsse stellt einen weiteren Schwerpunkt dar. A high capacity adhesively bonded joint of hollow sections in steel construction is developed in the scope of this thesis. In particular, the boundary conditions and requirements of the building industry are considered. The load-bearing behaviour of the adhesively bonded joints is determined and analysed with experimental and numerical investigations. The development and validation of a method to predict the load-bearing capacity of adhesively bonded joints emphasises additional features.

Nanostructured metals with maximal grain or twin sizes of less than 100 nm have advanced properties like increased strength. As beneficial as these microstructures can be for the strength of materials, they are not infinitely stable. During mechanical loading these metals tend to coarsen and lose their beneficial structure. Besides electron microscopic analysis of fatigued samples, in situ cycling tests were conducted in order to observe structural degradation during mechanical loading.