Abstract
Binhua Wang, Pengmin Lu, Yuhong Shao Key Laboratory for Highway Construction Technology and Equipment of Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China Email: wangbh@chd.edu.cn Abstract In order to minimize the restraint provided by the floor-beam web to rib rotation at support due to unsymmetrical loading in orthotropic decks, the structure of cutout holes are adopted at the place of rib-to-diaphragm welded connection. However, there is a large number of welding joint’s cracks formed at the edge of cutout holes. In this study, the comparative specimens with two types of cutout holes are designed, i.e. the circular arc transition structure and the vertical transition structure. And the fatigue life estimation of specimens is investigated with the application of the structural hot spot stress approach by use of finite element analyses. The results of the finite element calculations are compared with the results of the fatigue tests which are carried out on these full-scale specimens.
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