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Comparison of the Behaviour of Axially Loaded Slender Hollow Steel Tubes and Concrete Filled Steel Tubes

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Proceedings of the Indian Structural Steel Conference 2020 (Vol. 2) (ISSC 2020)

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 319))

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Abstract

Concrete filled steel tubes (CFSTs) are composite members in which concrete is encased within hollow steel tubes (HSTs). To understand the influence of the concrete core on the elastic local buckling stress and the axial strength of the steel tube, finite-element (FE) models of HST and CFST are developed using ABAQUS. From the FE analysis of CFST, it is evident that even for a diameter to thickness ratio (D/t) of 150 which is much higher than the (D/t) limit for slender members (D/t = 110), local buckling is not observed up to the ultimate load. This explains the reason for the highly conservative prediction of slender CFSTs by AISC 360-16. In addition, the yielding of the steel tube occurs before the peak strength of CFST is achieved, and the reduction in the load carrying capacity beyond peak load is due to the crushing of the core concrete. It is also observed that the axial strength of steel in CFSTs can be much lower than that predicted in the literature and codal provisions due to development of hoop stresses.

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Authors and Affiliations

  1. IIT Palakkad, Palakkad, India

    Rebecca Mary Paul, Madhu M. Karthik & M. V. Anil Kumar

Authors
  1. Rebecca Mary Paul
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  2. Madhu M. Karthik
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  3. M. V. Anil Kumar
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Correspondence to Rebecca Mary Paul .

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Editors and Affiliations

  1. Structural Steel Research Group, Department of Civil Engineering, Indian Institute of Technology Hyderabad, Sangareddy, India

    Mahendrakumar Madhavan

  2. Department of Civil and Environmental Engineering, Auburn University, Auburn, AL, USA

    James S. Davidson

  3. National University of Singapore, Queenstown, Singapore

    N. Elumalai Shanmugam

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Paul, R.M., Karthik, M.M., Kumar, M.V.A. (2023). Comparison of the Behaviour of Axially Loaded Slender Hollow Steel Tubes and Concrete Filled Steel Tubes. In: Madhavan, M., Davidson, J.S., Shanmugam, N.E. (eds) Proceedings of the Indian Structural Steel Conference 2020 (Vol. 2). ISSC 2020. Lecture Notes in Civil Engineering, vol 319. Springer, Singapore. https://doi.org/10.1007/978-981-19-9394-7_6

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  • DOI: https://doi.org/10.1007/978-981-19-9394-7_6

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-19-9393-0

  • Online ISBN: 978-981-19-9394-7

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