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The effects of rib shape and slit on fatigue properties of orthotropic steel decks

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Abstract

Orthotropic steel decks are composed of comparatively thin steel plates (as thin as 6 mm) that deform in the in-plane and out-of-plane directions at longitudinal-to-transverse rib connections in response to vehicle loads. Since such deformations can change as the load positions move, local stress directions can also vary such that hot spots along the weld toes are moved and the relationship between the load position and hot spot stress becomes complex. Furthermore, the deformations will differ depending on the specific type of connection. The present work investigated the effects of rib shapes and slits (that is, cut-outs) on the fatigue properties of such connections by calculating structural hot spot stresses at various connections by finite element analyses. The hot spot locations along weld toes were determined to vary depending on the load position, the longitudinal rib shape, and the presence of slits. It was also found that the load positions associated with maximum and minimum hot spot stresses at slit connections tended to be eccentric relative to the center axes of the evaluated ribs.

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Funding

This work was supported by IHI Infrastructure Systems Co., Ltd., JFE Engineering Corporation, JFE Steel Corporation, Kawada Industries, Inc., Kobe Steel, Ltd., Komaihaltec, Inc., Mitsui Zosen Steel Structures Engineering Co., Ltd., Miyaji Engineering Co., Ltd., MM Bridge Co., Ltd., Nippon Steel & Sumitomo Metal Corporation and Yokogawa Bridge Corp.

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Authors and Affiliations

  1. Nippon Steel Corporation, Chiba, Japan

    Koichi Yokozeki & Tomonori Tominaga

  2. Tokyo City University, Tokyo, Japan

    Chitoshi Miki

Authors
  1. Koichi Yokozeki
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  2. Tomonori Tominaga
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  3. Chitoshi Miki
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Correspondence to Koichi Yokozeki.

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Recommended for publication by Commission XIII - Fatigue of Welded Components and Structures

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Yokozeki, K., Tominaga, T. & Miki, C. The effects of rib shape and slit on fatigue properties of orthotropic steel decks. Weld World 65, 601–609 (2021). https://doi.org/10.1007/s40194-020-01031-w

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  • DOI: https://doi.org/10.1007/s40194-020-01031-w

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