Comparison of fatigue performances of gapped and partially overlapped CHS -joints

A Bracket‐Stiffened Two‐Planar Overlapped Tubular KT‐Joint for Offshore Jack‐Up Fatigue Analysis

“…Lee et al [27] carried out full-scale tests on overlapped K-joints and found that the SCF formulae by Ethymiou and Durkin [3] are conservative for the joints subjected to IPB loads, but not for the case of axial loads. Lee et al [31] compared the fatigue performances of nonoverlapped and partially overlapped K-joints under different loading conditions and concluded that a partially overlapped K-joint is superior to its nonoverlapped counterpart as most of the members in actual truss design are assumed to be axially loaded only. Other investigations include fatigue behavior of overlapped tubular joints with an overlapping ratio (i.e., the overlapped length to the brace diameter) larger than 50% [6,7,32], hysteretic behavior of reinforced overlapped joints [33], and local joint flexibility and strength of overlapped tubular joints [34][35][36].…”

“…From the preceding discussion, it can be concluded that the research efforts on the overlapped tubular joints expanded so far are mainly for uniplanar K-joints with inplane overlapping [3,6,7,[27][28][29][30][31][32]. Recently, Zhang et al [37] proposed a framework to derive the unified SCF values in multiplanar overlapped tubular KK-joints using an equivalent beam stick model and basic loading cases.…”

Stress concentration factors of negative large eccentricity tubular N-joints under axial compressive loading in vertical brace

“…The effect of geometrical parameters on the distribution of stress concentration factors along the welding seams toe of CHS KT-joints subjected to the balanced axial loads was numerically studied by Lotfollahi-Yaghin and Ahmadi [3]. The fatigue performance of overlapped and gap joints were studied by Lee et al [4]. The effects of geometrical parameters on the SCF distribution along the welding seams toe of double plane KT-joints subjected to the axial loads were numerically investigated by Ahmadi et al [5].…”

Stress concentration factors and fatigue behavior of square bird-beak SHS T-joints under out-of-plane bending

“…Cheng et al [16] carried out tests to obtain stress concentration factors of square bird-beak T-joints under chord and brace axial forces. Compared with abundant products for fatigue of conventional CHS and SHS steel connections that have been presented in literature [17][18][19][20][21][22][23][24][25][26][27] and with detailed provisions in current design codes such as IIW Fatigue Design Recommendation [28] and CIDECT Design Guide No. 8 [29], existing fatigue studies of bird-beak SHS joints are far from systematic and complete.…”