Damage criterion approach to high?strength steel RHS truss joints

This paper describes finite element simulations of the structural deformation and material fracture behaviour high-strength steel RHS K gap truss joints. The fundamental scope was to examine whether joint strength predictions based on lower more ductile with a yield stress 355 MPa or less would hold good for higher 450 ductility. FEA reliability analysis indicates that failure modes associated local buckling, yielding (chord side wall failure, chord face plastification brace failures due reduced effective width), existing approach could, modifications, be extended cover tubes, but ductility liable brittle (tearing in tension punching shear), reduction modifying factor required. incorporated damage mechanics calibrate experimental results both failure. proposes new formulation incorporates high-grade modifier function is not stress, instead recognizes ultimate strains, parameter material.