ABSTRACT
Regarding the revision of fatigue detail categories implemented in EN 1993-1-9, the discussion to integrate design approaches considering the beneficial application of innovative post-weld treatments, such as High Frequency Mechanical Impact (HFMI) treatment rises. Especially for fatigue loaded steel and composite bridges the potential of these technique enables to improve certain decisive welded details and shift the fatigue resistance to a higher level. In order to apply HFMI treatments for appropriate fatigue loaded steel structures in practice, rules have to be formulated in a code like manner.
Within this paper the work of the cooperative German DASt-AiF-Project “Development of a DASt-Guideline for High Frequency Mechanical Impact treatments” is presented, which aims at the implementation of a design concept in a German DASt-Guideline. The preceding work includes evaluation of existing knowledge and recommendations as well as analysis of collected and new test data with the aim to unify different applications into a homogenous and secured approach.
