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Studies on Axial Tensile Loading Capacity of CHS T-joints Reinforced with External Stiffening Rings

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Abstract

To analyze the effects of stiffening external rings on the brace axial tension capacity of circular hollow section T-joints (CHS-T), loading experiments and finite element model analysis were utilized. Three groups of full-scale specimens (reinforced and unreinforced T-joints) of different brace-to-chord diameter ratios were tested under tension to validate the strengthening effect (Three unreinforced specimens were previously tested and the other three reinforced samples were newly completed). The experimental equipment and parameters are described in detail. Load–ovalization and load–displacement curves in addition to the failure modes were analyzed. It is concluded that the ultimate strength and initial stiffness are significantly enhanced for the reinforced CHS joints compared to the unreinforced specimens. SHELL181 elements were utilized in the finite element analysis to accurately simulate the loading capacity with and without external stiffening rings of the joints, within 10% error.

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Acknowledgements

Grateful acknowledgement is made to Beijing Advanced Innovation Center for Future Urban Design (Grant No. UDC2016030200), and the National Natural Science Foundation of China (No. 51778035). Gratitude is also owed to the support from the Beijing Cooperative Innovation Research Center on Energy Saving and Emission Reduction, as well as the JiandaJieqing Plan.

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Authors and Affiliations

  1. Beijing Advanced Innovation Center for Future Urban Design, School of Civil and Transportation Engineering, Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials, Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, Beijing University of Civil Engineering and Architecture, Beijing, China

    Shanshan Huang & Lei Zhu

  2. China Architecture Design and Research Group, Beijing, China

    Hailin Sun

  3. Zhong Neng Power-Tech Development Company Limited, Beijing, China

    Miao Wang

  4. Beijing Research Base for Architectural Culture, Beijing University of Civil Engineering and Architecture, Beijing, China

    Xi Chen

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  1. Shanshan Huang
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  2. Lei Zhu
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  3. Hailin Sun
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  4. Miao Wang
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  5. Xi Chen
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Correspondence to Lei Zhu.

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Huang, S., Zhu, L., Sun, H. et al. Studies on Axial Tensile Loading Capacity of CHS T-joints Reinforced with External Stiffening Rings. Int J Steel Struct 20, 742–751 (2020). https://doi.org/10.1007/s13296-020-00319-3

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  • DOI: https://doi.org/10.1007/s13296-020-00319-3

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