TY - GEN
T1 - Understanding service stresses in dragline tubular structures
AU - Mashiri, F. R.
AU - Zhao, X. L.
AU - Pang, D.
AU - Dayawansa, P.
AU - Jiao, H.
AU - Chitty, G.
AU - Price, J.
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/55549132984
M3 - Conference article published in proceeding or book
AN - SCOPUS:55549132984
SN - 0415457556
SN - 9780415457552
T3 - Proceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
SP - 167
EP - 172
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 -