Testing, numerical analysis and design of stainless steel equal-leg angle section beams

Major‐axis buckling of pin‐ended stainless steel equal‐leg angle section members: FE modelling and design

“…Similar modelling assumptions to those used in [2][3][4] were adopted. The 4-noded shell element, S4R with reduced integration, was employed.…”

“…In addition, the lack of consideration of interactive buckling, described in Section 4, leads to unsafe results. On the other hand, the EC3 treatment for the simultaneous occurrence of both local and lateral-torsional buckling for major-axis bending has shown to be conservative [3], and becomes dominant for high 𝜃 values. A new interaction curve, anchored to the end points determined based on the new proposals in Section 6, is needed to provide more accurate resistance predictions for stainless steel equal-leg angle section columns and beam-columns cylindrically-pinned about the major-axis.…”

“…For determining the member buckling resistance of stainless steel equal-leg angle section members under majoraxis bending, the following expression is proposed [3]:…”

“…where 𝑁 b,Rd and 𝑀 b,𝑢,Rd are the member buckling resistances under axial compression and bending about the major 𝑢-𝑢 axis, respectively. The new proposals for 𝑁 b,Rd [2] and 𝑀 b,𝑢,Rd [3], with some modifications to reflect the findings reported in Section 4, are summarised below.…”

“…It is therefore crucial to study their behaviour when subjected to compression plus major-axis bending. Behzadi-Sofiani et al [2,3] recently developed new design equations for fixedended stainless steel angle section columns [2] and beams [3]. These new proposals were then used to establish a new approach for designing pin-ended stainless steel equal-leg angle section members subjected to compression and combined compression and minor-axis bending [4].…”