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Steel and Composite Structures
  Volume 18, Number 1, January 2015 , pages 135-148

Research on rib-to-diaphragm welded connection by means of hot spot stress approach
Binhua Wang, Pengmin Lu and Yuhong Shao

    The cutout hole locating at the place of rib-to-diaphragm welded connection is adopted to minimize the restraint, which is caused by the floor-beam web to rib rotation at the support due to the unsymmetrical loads in orthotropic deck. In practice, an inevitable problem is that there is a large number of welding joint's cracks formed at the edge of cutout hole. In this study, a comparative experiment is carried out with two types of cutout hole, the circular arc transition and the vertical transition. The fatigue life estimation of specimens is investigated with the application of the structural hot spot stress approach by finite element analyses. The results are compared with the ones of the fatigue tests which are carried out on these full-scale specimens. Factors affecting the stress range are also studied.
Key Words
    finite elements; orthotropic deck; rib-to-diaphragm welded connection; fatigue; hot spot stress
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