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Study on the Hot Spot Stress Distribution at Multi-Planar Tubular KK Joints Under Axial Loads

[+] Author Affiliations
Jingxia Yue, Jin Gan, Weiguo Wu

Wuhan University of Technology, Wuhan, Hubei, China

Shihong Zhai, Yanhua Yang

CCCC Second Harbour Engineering Company Ltd., Wuhan, Hubei, China

Paper No. OMAE2011-49737, pp. 545-550; 6 pages
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 2: Structures, Safety and Reliability
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4434-2
  • Copyright © 2011 by ASME


The Hot Spot Stress (HSS) distribution around welded tubular joints in truss legs is essential information for the fatigue assessment of jack-up platforms. Both Finite Element (FE) analysis and model test were carried out on a multi-planar tubular KK joints under asymmetric axial loads in our research. The study shows that the HSS distribution around welded joints is different from common K or T joints, and the maximum HSS appears between crown and saddle on the chord surface at the chord-brace intersection. Moreover, some sensitive factors which influence the locations of the maximum HSS were investigated by FEA in this paper. The analysis results are useful for the optimal structure designing and crack initial prediction of the offshore jack-up platforms legs.

Copyright © 2011 by ASME



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