Issue 41

S.M.J. Razavi et alii, Frattura ed Integrità Strutturale, 41 (2017) 432-439; DOI: 10.3221/IGF-ESIS.41.54 437 Figure 7: S-N-curves of hot dip galvanized connections. 10 100 1000 1.00E+04 1.00E+05 1.00E+06 1.00E+07 Stress range  [MPa] Number of cycles to failure Hot dip galvanized specimens Uncoated specimens 101 MPa k=3.48 Ps = 97.7 % Ps = 2.3 % 89 MPa Scatter index T σ = 1.409  σ 50% = 120 MPa (N = 2 ∙ 10 6 ) Figure 8: Unified scatterband considering uncoated and hot dip galvanized connections. C ONCLUSIONS his short technical note reports some new data from hot dip galvanized steel bolted connections under fatigue loading. In particular the effect of a galvanizing coating on the fatigue strength of S355 structural steel has been accurately investigated showing that the reduction in the fatigue life is very limited if compared with that of uncoated joints. A detailed procedure for the accurate preparation of the specimens has been also systematically provided, showing a good repeatability in the assembly of the specimens and then in the final fatigue behavior. T