Fatigue design using the structure stress concept for welded metal structures
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Bibliographic Details
| Author(s): |
Niclas Rausch
(Chair of Metal Structures, Technical University of Munich, Germany)
Martin Mensinger (Chair of Metal Structures, Technical University of Munich, Germany) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Resilient technologies for sustainable infrastructure, Christchurch, New Zealand, 3-5 February 2021 | ||||
| Published in: | IABSE Congress Christchurch 2020 | ||||
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| Page(s): | 1071-1078 | ||||
| Total no. of pages: | 8 | ||||
| DOI: | 10.2749/christchurch.2021.1071 | ||||
| Abstract: |
Due to the progress in FE calculations, local stress increases of welded metal structures can be evaluated more precisely using the structure stress approach (hot-spot stress concept). Inadequate regulations, however, lead to significant uncertainties with this approach. There is a deficiency in instructions on modelling, stress determination and methods for dealing with misalignment and thickness influences. Therefore, difficulties regarding the structure stress concept are pointed out and possible solution strategies are presented. To reduce uncertain influences from modelling, correction factors are specified based on the element approach, extrapolation rule and thickness. A series of static tests is carried out specifically for this purpose. The objective is to develop conclusive regulations for the hot-spot stress concept and evaluate it as an additional normatively anchored method for fatigue safety. |
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| Keywords: |
S-N curves fatigue design bridge construction Structure Stress Concept Hot-Spot Stress Method welded metal structures FE methods fatigue classes effect of misalignment and of thickness
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