TY - GEN
T1 - S-N curves for thin CHS-CHS T-joints under in-plane bending using the hot spot stress method
AU - Mashiri, F. R.
AU - Zhao, X. L.
PY - 2008
Y1 - 2008
N2 - Welded thin-walled T-joints made up of circular hollow section (CHS) chords and braces were tested under constant stress amplitude fatigue loading, for the load "in-plane bending in the brace". The tube wall thicknesses in the thin CHS-CHS T-joints were less than 4 mm. Existing fatigue design guides cover joints of thicknesses greater than or equal to 4 mm. The CHS tubes are high strength cold-formed steel. Using both the experimental stress concentration factors (SCFs) from previous research and parametric equation SCFs from existing fatigue design guidelines, the S-N data from the fatigue tests is expressed in the hot spot stress method. The resultant hot spot stress data is compared to existing hot spot stress design S-N curves. The deterministic method and the statistical method of least-squares are used to determine design S-N curves. The hot spot stress S-N data of the thin CHS-CHS T-joints is found to have lower than expected fatigue strength when compared to existing fatigue design curves.
AB - Welded thin-walled T-joints made up of circular hollow section (CHS) chords and braces were tested under constant stress amplitude fatigue loading, for the load "in-plane bending in the brace". The tube wall thicknesses in the thin CHS-CHS T-joints were less than 4 mm. Existing fatigue design guides cover joints of thicknesses greater than or equal to 4 mm. The CHS tubes are high strength cold-formed steel. Using both the experimental stress concentration factors (SCFs) from previous research and parametric equation SCFs from existing fatigue design guidelines, the S-N data from the fatigue tests is expressed in the hot spot stress method. The resultant hot spot stress data is compared to existing hot spot stress design S-N curves. The deterministic method and the statistical method of least-squares are used to determine design S-N curves. The hot spot stress S-N data of the thin CHS-CHS T-joints is found to have lower than expected fatigue strength when compared to existing fatigue design curves.
UR - http://www.scopus.com/inward/record.url?scp=55549147555&partnerID=8YFLogxK
M3 - Conference article published in proceeding or book
AN - SCOPUS:55549147555
SN - 0415457556
SN - 9780415457552
T3 - Proceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
SP - 113
EP - 118
BT - Proceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
T2 - 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
Y2 - 26 September 2007 through 28 September 2007
ER -