SCF FORMULAS FOR FATIGUE DESIGN OF K-CONNECTIONS BETWEEN SQUARE HOLLOW SECTIONS

A large numerical study into stress concentration factors (SCFs) for K -connections between square hollow sections has been carried out. An o verview of the Finite Element (FE) model and methods used for the dete rmination of the stress concentration factors is given. The results of the study are presented as a series of parametric formulae, together with other design guidelines necessary. A comparison with test results shows the accuracy of the method, The work complements earlier-studie s on 90 degrees T- and X-connections, presented in van Wingerde et al. (Journal of Constructional Steel Reseach, 1995, 71-115). In combinati on with work by others on circular hollow sections, this work forms a solid basis for general fatigue design guidelines for Hollow Structura l Section (HSS) connections. (C) 1997 Elsevier Science Ltd.