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Response and failure mechanism of tubular steel columns subjected to close-range explosions

Conference Paper


Abstract


  • A close-range blast event can cause severe damage to building structures due to its ability to produce

    very high localised impulsive loads. Such events can result from explosives that are attached to the

    critical elements of a structure, backpack and suitcase explosives, and vehicle or parcel bombs

    targeting the key structural elements of buildings and bridges. Steel hollow sections are among the

    most commonly used prefabricated structural element types that are widely used in Australia.

    Therefore, adopting the necessary precautionary measures in the design of such elements against

    close-range blast is worthwhile to explore. This paper focuses on an experimental and numerical study

    performed on concrete-filled and hollow square tubular columns (100 x 5 mm SHS Grade C350) made

    out of cold-formed structural steel hollow sections (SHS) that were subjected to highly explosive TNT

    charges. The charges were placed above the top surface of the column at two different scaled standoff

    distances of 0.12 m/kg1/3 and 0.15 m/kg1/3. The failure mechanism and the pressure development of

    the hollow and concrete-filled columns are discussed and presented. The advantages of using concrete

    as an infill material for reducing the structural damage are also discussed.

UOW Authors


  •   Ngo, Tuan D. (external author)
  •   Mohotti, Damith (external author)
  •   Alex M. Remennikov
  •   Uy, Brian (external author)

Publication Date


  • 2014

Citation


  • Ngo, T., Mohotti, D., Remennikov, A. & Uy, B. (2014). Response and failure mechanism of tubular steel columns subjected to close-range explosions. 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23) (pp. 1045-1050). Lismore, Australia: Southern Cross University.

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3773

Start Page


  • 1045

End Page


  • 1050

Place Of Publication


  • http://scu.edu.au/acmsm23/

Abstract


  • A close-range blast event can cause severe damage to building structures due to its ability to produce

    very high localised impulsive loads. Such events can result from explosives that are attached to the

    critical elements of a structure, backpack and suitcase explosives, and vehicle or parcel bombs

    targeting the key structural elements of buildings and bridges. Steel hollow sections are among the

    most commonly used prefabricated structural element types that are widely used in Australia.

    Therefore, adopting the necessary precautionary measures in the design of such elements against

    close-range blast is worthwhile to explore. This paper focuses on an experimental and numerical study

    performed on concrete-filled and hollow square tubular columns (100 x 5 mm SHS Grade C350) made

    out of cold-formed structural steel hollow sections (SHS) that were subjected to highly explosive TNT

    charges. The charges were placed above the top surface of the column at two different scaled standoff

    distances of 0.12 m/kg1/3 and 0.15 m/kg1/3. The failure mechanism and the pressure development of

    the hollow and concrete-filled columns are discussed and presented. The advantages of using concrete

    as an infill material for reducing the structural damage are also discussed.

UOW Authors


  •   Ngo, Tuan D. (external author)
  •   Mohotti, Damith (external author)
  •   Alex M. Remennikov
  •   Uy, Brian (external author)

Publication Date


  • 2014

Citation


  • Ngo, T., Mohotti, D., Remennikov, A. & Uy, B. (2014). Response and failure mechanism of tubular steel columns subjected to close-range explosions. 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23) (pp. 1045-1050). Lismore, Australia: Southern Cross University.

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3773

Start Page


  • 1045

End Page


  • 1050

Place Of Publication


  • http://scu.edu.au/acmsm23/