Design of chord sidewall failure in RHS joints using steel grades up to S960

Experimental investigation of cold formed high strength steel tubular joints subjected to moment loading

“…The undue conservatism given to the IPB specimens of β = 1.0 is, therefore, directly related to the undue conservatism of the axial chord sidewall design resistance. Indeed, the conservatism of the chord sidewall design resistance has been pointed out by many researchers including Kim and Lee (2021) and Lan et al (2021). These works (Kim and Lee, 2021; Lan et al, 2021) have also suggested improved design formulae for the chord sidewall failure.…”

“…Indeed, the conservatism of the chord sidewall design resistance has been pointed out by many researchers including Kim and Lee (2021) and Lan et al (2021). These works (Kim and Lee, 2021; Lan et al, 2021) have also suggested improved design formulae for the chord sidewall failure. The suggested formulae are primarily for axially loaded joints but they may be extended to IPB-loaded or OPB-loaded joints as shown in Table 12.…”

“… a h 1 is replaced by 0.5 h 1 for IPB loading. b In this study, the relevant buckling curve was chosen to be the curve “c” for all cases. c Lan et al (2021) also suggested a simple alternative equation for the derivation of the buckling reduction factor. d Chord stress factor ( Q f ) is not presented.…”

“… c Lan et al (2021) also suggested a simple alternative equation for the derivation of the buckling reduction factor.…”

“…While the formula of Kim and Lee (2021) provides a conservative design resistance as similar to the prEN 1993-1-8 formula, an improved accuracy is given by the formula of Lan et al (2021). The excessive conservatism of the prEN 1993-1-8 formula is primarily attributed to the high slenderness ratio, which assumes that the boundary condition of the chord sidewall is rotationally free along the RHS longitudinal edges.…”