Advertisement

International Journal of Steel Structures

, Volume 18, Issue 5, pp 1525–1540 | Cite as

Experimental and Numerical Study on Complex Multi-planar Welded Tubular Joints in Umbrella-Type Space Trusses with Long Overhangs

  • Jinfeng Jiao
  • Xiao Ma
  • Honggang Lei
  • Y. Frank Chen
Article
  • 41 Downloads

Abstract

A test rig with multi-functional purposes was specifically designed and manufactured to study the behavior of multi-planar welded tubular joints subjected to multi-planar concurrent axial loading. An experimental investigation was conducted on full-scale welded tubular joints with each consisting of one chord and eight braces under monotonic loading conditions. Two pairs or four representative specimens (two specimens for each joint type) were tested, in which each pair was reinforced with two kinds of different internal stiffeners at the intersections between the chords using welded rectangular hollow steel sections (RHSSs) and the braces using rolled circular hollow steel sections (CHSSs) and welded RHSSs. The effects of different internal stiffeners at the chord–brace intersection on the load capacity of joints under concurrent multi-planar axial compression/tension are discussed. The test results of joint strengths, failure modes, and load–stress curves are presented. Finite element analyses were performed to verify the experimental results. The study results show that the two different joint types with the internal stiffeners at the chord–brace intersection under axial compression/tension significantly increase the corresponding ultimate strength to far exceed the usual design strength. The load carrying capacity of welded tubular joints decreases with a higher degree of the manufacturing imperfection in individual braces at the tubular joints. Furthermore, the interaction effect of the concurrent axial loading applied at the welded tubular joint on member stress is apparent.

Keywords

Experiment Finite element Multi-planar welded tubular joint Space-truss Full-scale specimen 

Notes

Acknowledgements

The authors are grateful to the financial support provided by the Natural Science Foundation of China (NSFC) through Grant No. 51578357, the Natural Science Foundation of Shanxi province of China through Grant No. 2015011062, and Talent Training Program in the postgraduate joint training base of Shanxi province of China through Grant No. 2016JD11.

References

  1. ABAQUS/Standard user’s manual-version 6.10, 2010.Google Scholar
  2. Andrade, S. A. L. D., Vellasco, P. C. G. D., Silva, J. G. S. D., Lima, L. R. O. D., & Este, A. V. D. (2005). Tubular space trusses with simple and reinforced end-flattened nodes-an overview and experiments. Journal of Constructional Steel Research, 61(8), 1025–1050.CrossRefGoogle Scholar
  3. Chan, T. K., Fung, T. C., Tan, C. Y., & Soh, C. K. (2001). Behaviour of reinforced tubular T-joints. Structures and Buildings, 146(3), 263–274.Google Scholar
  4. Chen, Y. Y., Chen, Y. J., Zhan, C., Lin, Y. R., & Dong, M. (2003). Experimental research on multi-planar joints of steel tubular members. China Civil Engineering Journal, 36(8), 24–29.Google Scholar
  5. Chen, Y., Feng, R., & Wang, J. (2015). Behaviour of bird-beak square hollow section X-joints under out-of-plane bending. Journal of Constructional Steel Research, 106, 234–245.CrossRefGoogle Scholar
  6. Choo, Y. S., Liang, J. X., Van der Vegte, G. J., & Liew, J. Y. R. (2004). Static strength of double plate reinforced CHS X-joints loaded by in-plane bending. Journal of Constructional Steel Research, 60, 1725–1744.CrossRefGoogle Scholar
  7. Choo, Y. S., Qian, X. D., Lies, J. Y. R., & Wardenier, J. (2003a). Static strength of thick-walled CHS X-joints—part I. New approach in strength definition. Journal of Constructional Steel Research, 59, 1201–1228.CrossRefGoogle Scholar
  8. Choo, Y. S., Qian, X. D., Lies, J. Y. R., & Wardenier, J. (2003b). Static strength of thick-walled CHS X-joints—part II. Effect of chord stresses. Journal of Constructional Steel Research, 59, 1229–1250.CrossRefGoogle Scholar
  9. Christitsas, A. D., Pachoumis, D. T., Kalfas, C. N., & Galoussis, E. G. (2007). FEM analysis of conventional and square bird-beak SHS joint subject to in-plane bending moment-experimental study. Journal of Constructional Steel Research, 63, 1361–1372.CrossRefGoogle Scholar
  10. Davies, G., & Crockett, P. (1996). The strength of welded T-DT joints in rectangular and circular hollow section under variable axial loads. Journal of Constructional Steel Research, 37(1), 1–31.CrossRefGoogle Scholar
  11. Ding, B. D., Lu, H. L., Zhou, S. C., & Ding, L. (2008). Experiments on bending resistance properties of tubular T-joint. Sichuan Building Science, 34(05), 13–16.Google Scholar
  12. Feng, R., Chen, Y., Wei, L., & Ruan, X. F. (2015). Behaviour of CHS brace-to-H-shaped chord X-joints under in-plane bending. Journal of Constructional Steel Research, 114, 8–19.CrossRefGoogle Scholar
  13. Hoon, K. H., Wong, L. K., & Soh, A. K. (2001). Experimental investigation of a double-plate reinforced tubular T-joint subjected to combined loadings. Journal of Constructional Steel Research, 57(9), 1015–1039.CrossRefGoogle Scholar
  14. Lesani, M., Bahaari, M. R., & Shokrieh, M. M. (2013). Detail investigation on un-stiffened T/Y tubular joints behavior under axial compressive loads. Journal of Constructional Steel Research, 80, 91–99.CrossRefGoogle Scholar
  15. Liu, S., Wang, H., Liu, J. H., & Jiang, G. Y. (2010). Experiment study on multi-tube intersection joint of Wuhan Railway Station. Construction Technology, 39(7), 7–9.Google Scholar
  16. Ministry of Construction of the P.R. China. (2003). GB 50017-2003 Code for design of steel structures. Beijing, China.Google Scholar
  17. Nassiraei, H., Lotfollahi-Yaghin, M. A., & Ahmadi, H. (2016a). Static strength of collar plate reinforced tubular T/Y-joints under brace compressive loading. Journal of Constructional Steel Research, 119, 39–49.CrossRefGoogle Scholar
  18. Nassiraei, H., Lotfollahi-Yaghin, M. A., & Ahmadi, H. (2016b). Structural behavior of tubular T/Y-joints with collar plate under static in-plane bending. Journal of Constructional Steel Research, 123, 121–134.CrossRefGoogle Scholar
  19. Paul, J. C., Makino, Y., & Kurobane, Y. (1993). Ultimate resistance of tubular double T-joints under axial brace loading. Journal of Constructional Steel Research, 24, 205–228.CrossRefGoogle Scholar
  20. Peña, A., & Chacón, R. (2014). Structural analysis of diamond bird-beak joints subjected to compressive and tensile forces. Journal of Constructional Steel Research, 98, 158–166.CrossRefGoogle Scholar
  21. Scola, S., Redwood, R. G., & Mitri, H. S. (1990). Behaviour of axially loaded tubular V-joints. Journal of Constructional Steel Research, 16, 89–109.CrossRefGoogle Scholar
  22. Shu, X. P., Zhu, Z. R., & Wang, Y. Q. (2006). Full-scale experimental research on tubular N-joints of square chords with circular braces. Journal of Building Structures, 27(1), 66–70.Google Scholar
  23. Shu, X. P., Zhu, S. N., Xia, X. H., & Yang, X. (2004). Full-scale experiment research on CHS joints of steel roof of He Long Stadium in Changsha. Journal of Building Structures, 25(3), 8–13.Google Scholar
  24. Standardization administration of the P.R. China. (2008). GB/T 985.2-2008 Recommended joint preparation for submerged arc welding. Beijing, China.Google Scholar
  25. Tong, L. W., Xu, G. W., Liu, Y. Q., Yan, D. Q., & Zhao, X. L. (2015). Finite element analysis and formulae for stress concentration factors of diamond bird-beak SHS T-joints. Thin-Walled Structures, 86, 108–120.CrossRefGoogle Scholar
  26. Van der Vegte, G. J., & Wardenier, J. (1998). The static strength of multi-planar tubular TX-joints under axial loading excluding the effects of overall chord bending moments. Journal of Constructional Steel Research, 47, 141–168.CrossRefGoogle Scholar
  27. Wang, W., Gu, Q., Ma, X. X., & Wang, J. J. (2015). Axial tensile behavior and strength of welds for CHS branches to SHS chord joints. Journal of Constructional Steel Research, 115, 303–315.CrossRefGoogle Scholar
  28. Wang, S., Zhang, G. J., Ge, J. Q., Chen, X., & Chen, Z. M. (2010). Full-scale model experiment and research of large diameter steel tubular spatial penetrated joint with chord bearing tension. Building Structure, 40(12), 19–24.Google Scholar
  29. Yeoh, S. K., Soh, A. K., & Soh, C. K. (1995). Behaviour of tubular T-joints subjected to combined loadings. Journal of Constructional Steel Research, 32, 259–280.CrossRefGoogle Scholar
  30. Zhao, X. L. (2000). Deformation limit and ultimate strength of welded T-joints in cold-formed RHS sections. Journal of Constructional Steel Research, 53, 149–165.CrossRefGoogle Scholar

Copyright information

© Korean Society of Steel Construction 2018

Authors and Affiliations

  1. 1.College of Architecture and Civil EngineeringTaiyuan University of TechnologyTaiyuanChina
  2. 2.School of Civil EngineeringChongqing UniversityChongqingChina
  3. 3.Department of Civil EngineeringThe Pennsylvania State UniversityMiddletownUSA

Personalised recommendations