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Ultimate Tensile Resistance of Bolted Gusset Plates

Journal Article


Abstract


  • This paper discusses the ultimate capacities of bolted gusset plates that fail by tensile rupture. In addition to the block shear failure mode to which most gusset plates in bridge trusses and those in braced building frames are subject, a narrow tapered gusset plate may also fail in the inclined net section fracture mode. The inclined net section fracture mode has been observed in failed gusset plates, but to the authors' knowledge no explicit formula has been proposed in the literature for use in engineering practice. This paper first demonstrates that, for a rectangular bolted gusset plate failing in net section fracture, the ultimate capacity can be determined accurately using the net section across the whole width, without any reference to the Whitmore concept. It then shows through finite-element analysis that the outer net section fractures of a tapered plate are inclined rather than normal to the loading direction. A practical design equation is proposed to determine the net section tension capacity of a tapered gusset plate, and is shown to reasonably match the ultimate loads of specimens tested by independent workers. The existing resistance factor can be applied conservatively to the design equation. This paper includes examples illustrating the governing failure modes of rectangular and tapered bolted gusset plates in tension.

Publication Date


  • 2019

Citation


  • Elliott, M. D., & Teh, L. H. (2019). Ultimate Tensile Resistance of Bolted Gusset Plates. Practice Periodical on Structural Design and Construction, 24(4). doi:10.1061/(ASCE)SC.1943-5576.0000454

Scopus Eid


  • 2-s2.0-85072176863

Volume


  • 24

Issue


  • 4

Abstract


  • This paper discusses the ultimate capacities of bolted gusset plates that fail by tensile rupture. In addition to the block shear failure mode to which most gusset plates in bridge trusses and those in braced building frames are subject, a narrow tapered gusset plate may also fail in the inclined net section fracture mode. The inclined net section fracture mode has been observed in failed gusset plates, but to the authors' knowledge no explicit formula has been proposed in the literature for use in engineering practice. This paper first demonstrates that, for a rectangular bolted gusset plate failing in net section fracture, the ultimate capacity can be determined accurately using the net section across the whole width, without any reference to the Whitmore concept. It then shows through finite-element analysis that the outer net section fractures of a tapered plate are inclined rather than normal to the loading direction. A practical design equation is proposed to determine the net section tension capacity of a tapered gusset plate, and is shown to reasonably match the ultimate loads of specimens tested by independent workers. The existing resistance factor can be applied conservatively to the design equation. This paper includes examples illustrating the governing failure modes of rectangular and tapered bolted gusset plates in tension.

Publication Date


  • 2019

Citation


  • Elliott, M. D., & Teh, L. H. (2019). Ultimate Tensile Resistance of Bolted Gusset Plates. Practice Periodical on Structural Design and Construction, 24(4). doi:10.1061/(ASCE)SC.1943-5576.0000454

Scopus Eid


  • 2-s2.0-85072176863

Volume


  • 24

Issue


  • 4