Understanding service stresses in dragline tubular structures

F. R. Mashiri, X. L. Zhao, D. Pang, P. Dayawansa, H. Jiao, G. Chitty, J. Price

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

Abstract

Draglines are one of the most important machines used in open cast mining. Some of the draglines have booms that are primarily made up of circular hollow section tubes. The welded tubular connections in these booms are however prone to fatigue cracking under service. Numerous cracks have been observed with cracking leading to progressive collapse of the booms. In order to understand some the cracking in the tubular boom structure, field measurements have been carried out to determine stress-time histories. The stress-time histories have been determined for different load cases, static, dynamic swing and dynamic digging tests. Using these stress-time histories, the resultant hot spot stresses in lacing and chord members are evaluated. The magnitude of bending stresses in the lacing and chord members are also determined and compared to axial stresses. The stresses discussed in this paper are for a 4-lacing cluster located near the boom foot.

Original languageEnglish
Title of host publicationProceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
Pages167-172
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 Sep 200728 Sep 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

Fingerprint

Dive into the research topics of 'Understanding service stresses in dragline tubular structures'. Together they form a unique fingerprint.

Cite this