Skip to main content
placeholder image

Improving the ductility of knee joints between rectangular hollow sections

Journal Article


Download full-text (Open Access)

Abstract


  • This report describes a new welding-based solution that significantly increases the rotation

    capacity of a stiffened welded knee joint between DuraGal C450 RHS under opening

    moment. The proposed solution is more economical than the use of internal sleeves, and can

    be applied to new as well as existing structures. The solution involves the use of extra layers

    of weld on the inner (tension) flange of a stiffened welded knee joint. Laboratory test results

    are presented to demonstrate that the solution enables such a joint between DuraGal C450

    150× 50× 4 or 150× 50× 5 RHS to satisfy the rotation capacity requirement specified for

    plastic design of steel frames. A number of factors that may contribute to the lack of rotation

    capacity of a normally welded stiffened knee joint are discussed. The reasons why the new

    solution results in increased rotation capacities are explained in terms of strain redistribution

    and strain reduction in the tensile regions around the knee joints. It is shown through

    experimental tests and finite element analyses that the most important parameter of the

    proposed solution is the width of the extra layers of weld. Although the presence of the seam

    weld in the inner flange results in a significantly reduced rotation capacity, the proposed

    solution still ensures an adequate rotation capacity for a stiffened welded knee joint between

    DuraGal 150× 50× 5 RHS. This report also discusses an appropriate definition for the

    rotation capacity of a knee joint under opening moment, including the plastic moment to be

    used in measuring the rotation capacity.

Authors


  •   Teh, Lip H.
  •   Hancock, Gregory J. (external author)

Publication Date


  • 2004

Citation


  • Teh, L. H. & Hancock, G. J. (2004). Improving the ductility of knee joints between rectangular hollow sections. Journal of Structural Engineering, 130 (11), 1790-1798.

Scopus Eid


  • 2-s2.0-13844266368

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1666&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/629

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 1790

End Page


  • 1798

Volume


  • 130

Issue


  • 11

Abstract


  • This report describes a new welding-based solution that significantly increases the rotation

    capacity of a stiffened welded knee joint between DuraGal C450 RHS under opening

    moment. The proposed solution is more economical than the use of internal sleeves, and can

    be applied to new as well as existing structures. The solution involves the use of extra layers

    of weld on the inner (tension) flange of a stiffened welded knee joint. Laboratory test results

    are presented to demonstrate that the solution enables such a joint between DuraGal C450

    150× 50× 4 or 150× 50× 5 RHS to satisfy the rotation capacity requirement specified for

    plastic design of steel frames. A number of factors that may contribute to the lack of rotation

    capacity of a normally welded stiffened knee joint are discussed. The reasons why the new

    solution results in increased rotation capacities are explained in terms of strain redistribution

    and strain reduction in the tensile regions around the knee joints. It is shown through

    experimental tests and finite element analyses that the most important parameter of the

    proposed solution is the width of the extra layers of weld. Although the presence of the seam

    weld in the inner flange results in a significantly reduced rotation capacity, the proposed

    solution still ensures an adequate rotation capacity for a stiffened welded knee joint between

    DuraGal 150× 50× 5 RHS. This report also discusses an appropriate definition for the

    rotation capacity of a knee joint under opening moment, including the plastic moment to be

    used in measuring the rotation capacity.

Authors


  •   Teh, Lip H.
  •   Hancock, Gregory J. (external author)

Publication Date


  • 2004

Citation


  • Teh, L. H. & Hancock, G. J. (2004). Improving the ductility of knee joints between rectangular hollow sections. Journal of Structural Engineering, 130 (11), 1790-1798.

Scopus Eid


  • 2-s2.0-13844266368

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1666&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/629

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 1790

End Page


  • 1798

Volume


  • 130

Issue


  • 11