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Block Shear Strength of Double-Lap Welded Connections in Mild Carbon Steel Plate

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Abstract

This paper presents experimental and numerical investigations related to the block shear mechanism of double-lap welded connections. The experiment investigation includes 36 specimens composed of 3.0 mm and 6.0 mm thick mild carbon steel SS275 plates with varying block lengths and widths. It is found that the tension fracture in block shear of welded connection tends to be curved along the critical plane. The numerical results shows that the stress triaxiality effect in increasing the tensile stress over the critical tension plane, and thus the tension resistance component increases. This paper also examines the accuracy of various block shear strength equations given in the design codes as well as the literature. Topkaya’s equation is found to be significantly more accurate than other block shear strength equations for the tested specimens. Nonetheless, it is recommended to use the reduced tensile coefficient to ensure both safe margin and the accuracy.

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Acknowledgements

The first author is supported by Basic Science Research Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Education (2016R1A6A1A03012812). Also, Corresponding and third authors are supported the Korea Institute of Energy Technology Evaluation and Planning(KETEP) and the Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea (No. 20204030200080).

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Authors and Affiliations

  1. University Core Research Center for Disaster-free and Safe Ocean City Construction, Dong-A University, Busan, 49315, Republic of Korea

    YongHyun Cho

  2. Department of Architectural Engineering, Hanbat National University, Daejeon, 34158, Republic of Korea

    TaeSoo Kim & JunSu Kim

  3. Department of Civil and Environmental Engineering, Southern University and A&M College, Baton Rouge, LA, 70813, USA

    Dongkeun Lee

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  1. YongHyun Cho
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  2. TaeSoo Kim
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  3. JunSu Kim
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  4. Dongkeun Lee
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Correspondence to TaeSoo Kim.

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Cho, Y., Kim, T., Kim, J. et al. Block Shear Strength of Double-Lap Welded Connections in Mild Carbon Steel Plate. Int J Steel Struct 21, 1894–1909 (2021). https://doi.org/10.1007/s13296-021-00541-7

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  • DOI: https://doi.org/10.1007/s13296-021-00541-7

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