Distortional–global interaction buckling of stainless steel C-beams: Part I — Experimental investigation

Structural performance of stainless steel circular hollow sections under combined axial load and bending – Part 2: Parametric studies and design

“…With regards to cross-section load-carrying capacities, existing design codes [1][2][3] generally limit the design stress to the 0.2% proof stress without considering the pronounced strain hardening in the strength predictions of stocky crosssections, and neglect element interaction in the treatment of local buckling. A series of stub column and four-point bending tests have been previously conducted on stainless steel closed sections -square and rectangular hollow sections (SHS and RHS) [4][5][6][7][8][9][10][11][12][13][14][15] and circular hollow sections (CHS) [16][17][18][19][20][21][22], and open sections -I-sections [16,18,23,24], channel sections [18,[25][26][27][28] and angle sections [18,29]. Comparisons of the test results with codified capacity predictions revealed undue conservatism in the existing standards.…”

Experimental study of stainless steel angles and channels in bending

“…Column and beam tests have been performed on stainless steel oval hollow sections (OHS) [6,7], whilst tests on stainless steel non-doubly symmetric sections have been mainly focusing on angle [8], channel [8] and lipped channel sections [9][10][11] in compression. Recently, tests on stainless steel lipped channel section beams bent about their major axis have been conducted [12] to investigate the interaction between distortional and global buckling. When asymmetric sections are subjected to bending about an axis that is not an axis of symmetry, flexure induces different stresses at the extreme tensile and compressive extreme fibres and leads to a shift in neutral axis with the progression of plasticity.…”

07.02: Distortional‐global interaction in lipped channel beams: Part I: Mechanics and elastic behaviour

“…5(b1)-(b3) confirm this assertion. (vii) It is still worth noting that, in [1], the authors report that, during the tests, "(…) minor distortions of the compression flange were observed when the load was near the ultimate limit state (…) distortional buckling deformations then developed very quickly, accompanied by large flexural-torsional deformations (…) and a steep drop in load ", which is full agreement with the numerical results just discussednaturally, the kinematics involved do not depend on the material (carbon or stainless steel).…”

“…Moreover, assessing the structural behaviour of the aforementioned members requires acquiring in-depth knowledge concerning the mechanics involved in the couplings between the three above buckling modes, a genuine geometrically non-linear feature that influences considerably the member postbuckling behaviour. In this work, CFS lipped channel beams experiencing D-G interaction are considered, a topic lacking research (to the authors' best knowledge, there are no available publications)the only existing studies concern experimental ("4-point bending") and numerical investigations on stainless steel LC [1][2]. Thus, a significant research effort is needed before efficient design rules can be established for beams affected by D-G interactionthe present and companion [3] papers aim at contributing to this objective.…”