In steel construction, structures subject to cyclical loads (e.g. bridges, cranes, masts, wind turbines) can suffer unforeseen fatigue damage that makes repair measures necessary. In national bridge construction, this is shown, among other things, by an increasing deterioration in the condition of bridge structures. Above all, conditions deviating from the original design, such as an extension of the operating time, changing external conditions (increased traffic volume, increased freight traffic) as well as production or execution-related errors in the construction or upgrading of the structures can lead to overstressing and thus to damage to the mentioned supporting structures.
Bonding technology represents a promising alternative to the classical strengthening methods. At present, however, there are no systematic and comprehensive investigations and thus no regulations for the adhesive strengthening of fatigue-stressed construction details when used under construction site conditions.
The aim of the project is the development and analysis of concepts for the adhesive strengthening of fatigue damages by the use of bonded "steel patches" for steel structures under consideration of defined conditions of use. The specific requirements for practical use on the construction site are included in the investigations. For this purpose, the following scientific-technical tasks will be dealt with within the framework of the research project:
