S-N curves for thin CHS-CHS T-joints under in-plane bending using the hot spot stress method

F. R. Mashiri, X. L. Zhao

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
Pages113-118
Number of pages6
Publication statusPublished - 2008
Externally publishedYes
Event4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction - Melbourne, VIC, Australia
Duration: 26 Sept 200728 Sept 2007

Publication series

NameProceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
Volume1

Conference

Conference4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
Country/TerritoryAustralia
CityMelbourne, VIC
Period26/09/0728/09/07

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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