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Mechanical property of U-Shaped 65Mn steel bumpers for seismic base isolation

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Abstract

This study proposes a novel U-shaped 65Mn steel bumper as the displacement restraining device for base-isolated structures with laminated elastomeric rubber bearings. A series of bumpers with different geometric parameters were designed and tested under monotonic and cyclic quasi-static loading protocols. The experimental results from a total of 232 specimens were analyzed to develop an analytical model to calculate the backbone curve and the maximum elastic restoring force for U-shaped 65Mn bumpers. Thus, the analytical equations to calculate the elastic, hardening, and unloading stiffness of U-shaped 65Mn bumpers, as well as their maximum elastic restoring force, are validated by using an additional ten groups of bumpers with varying radiuses. These analytical equations can accurately predict the mechanical parameters of U-shaped 65Mn steel bumpers for a design purpose.

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Authors and Affiliations

  1. Beijing University of Civil Engineering and Architecture, Beijing, 102612, China

    Han Miao & Du Hongkai

  2. BHB Consulting Engineers, Salt Lake City, Utah, 84115, USA

    Wang Yuandong

  3. Jining Huiyuan Huazhu Architectural Design Co., Ltd, Jining, 272000, China

    Cui Xiangdong

  4. University of Utah, Salt Lake City, Utah, 84112, USA

    Du Hongkai

Authors
  1. Han Miao
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  2. Wang Yuandong
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  3. Du Hongkai
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  4. Cui Xiangdong
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Corresponding author

Correspondence to Du Hongkai.

Additional information

Supported by: National Science Foundation of China for the Financial Support for This Research under Grant Nos. 51378047 and 51408027

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Miao, H., Yuandong, W., Hongkai, D. et al. Mechanical property of U-Shaped 65Mn steel bumpers for seismic base isolation. Earthq. Eng. Eng. Vib. 20, 791–802 (2021). https://doi.org/10.1007/s11803-021-2052-5

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  • DOI: https://doi.org/10.1007/s11803-021-2052-5

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