03.01: Bonded steel joints under cyclic loading: Study on structural behaviour und fatigue

ABSTRACT Bonding technology can be seen as an alternative to classical bonding methods in steel construction, because fundamental problems such as residual stresses can be prevented. Yet, doubts remain concerning this innovative bonding technology, due to a lack of knowledge regarding the durability. This is the focus of an ongoing experimental study, which addresses the prediction of the service life of adhesive bonded façade connections, concentrating on the connection of a trapezoidal façade profile. This innovative connection provides mechanical and aesthetic benefits. But in comparison to classical steel bonding, the performance of adhesive bonds must be regarded as time and environment dependent. Because the studied façade connection is mainly stressed by temperature and wind loads, the first aim is to derive a representative experimental process based on actual measured environmental data. Cyclic small sized and model component experiments allow a comprehensive consideration of the effects mentioned. Three different adhesive systems are examined, which are well suited for cyclic loading. The results of the experiments form the foundation for developing design rules for adhesive steel bonds in façade construction. Particular focus lies on the low cycle fatigue domain, which has not been examined for adhesive bonds before. By means of the described method, the aim is to enhance the integration of adhesive bonding in steel construction, strengthen the confidence of engineers regarding the novel adhesive technology and further increase the innovation ability of construction engineering.