PSI - Issue 68
419 5
Akito Tabata et al. / Procedia Structural Integrity 68 (2025) 415–419 A. Tabata et al. / Structural Integrity Procedia 00 (2025) 000–000
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Figure 7. S - N 5% diagram when conventional steel is applied.
Figure 8. S - N 5% diagram when developed steel is applied.
4. Summary Our results are summarized as follows 1. According to the fatigue test using OSDs partial model specimen, the fatigue crack was initiated from the HAZ of the deck plate in rib-to-deck. 2. According to the fatigue test using small specimens simulating rib-to-deck, it was confirmed that the crack initiation life was stably improved in rib-to-deck welded joints to which the developed steel was applied. References Hattori, M., Tateishi, K., Hanji, T., Shimizu, Y., 2021. Proceedings of Japan Society of Civil Engineers, Vol.77, No.2, pp. 255-270. (in Japanese) Japan Road Association, 2002. the Guideline for Fatigue Design of Steel Road Bridges. (in Japanese) Japan Road Association, 2012. the specifications for highway bridges. (in Japanese) Japan Society of Civil Engineers, 2010. Fatigue of Orthotropic steel decks. (in Japanese) Ito, T., Sandaiji, Y., Takashima, Y., Tonan, T., Matsushita, M., Kinefuchi, M., 2023. Improvement of fatigue crack initiation properties using solid solution strengthening, Proceedings in JSME Materials and Processing Conference (in Japanese).
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