Advances in Computational Design

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Elastoplastic FEM analysis of earthquake response for the field-bolt joints of a tower-crane mast

  • Received : 2018.11.20
  • Accepted : 2019.01.16
  • Published : 2019.01.25
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Abstract

Safety measures for tower cranes are extremely important among the seismic countermeasures at high-rise building construction sites. In particular, the collapse of a tower crane from a high position is a very serious catastrophe. An example of such an accident due to an earthquake is the case of the Taipei 101 Building (the author was the project director), which occurred on March 31, 2002. Failure of the bolted joints of the tower-crane mast was the direct cause of the collapse. Therefore, it is necessary to design for this eventuality and to take the necessary measures on construction sites. This can only be done by understanding the precise dynamic behavior of mast joints during an earthquake. Consequently, we created a new hybrid-element model (using beam, shell, and solid elements) that not only expressed the detailed behavior of the site joints of a tower-crane mast during an earthquake but also suppressed any increase in the total calculation time and revealed its behavior through computer simulations. Using the proposed structural model and simulation method, effective information for designing safe joints during earthquakes can be provided by considering workability (control of the bolt pretension axial force and other factors) and less construction cost. Notably, this analysis showed that the joint behavior of the initial pretension axial force of a bolt is considerably reduced after the axial force of the bolt exceeds the yield strength. A maximum decrease of 50% in the initial pretension axial force under the El Centro N-S Wave ($v_{max}=100cm/s$) was observed. Furthermore, this method can be applied to analyze the seismic responses of general temporary structures in construction sites.

Keywords

References

  1. Ai, B., Yang, J.L. and Pei, Z.Z. (2013), "Seismic response analysis of tower crane in consideration of the building-crane interaction", Appl. Mech. Mater., 353-356, 1981-1985 https://doi.org/10.4028/www.scientific.net/AMM.353-356.1981
  2. Architectural Institute of Japan (2012), Recommendation for Design of Connections in Steel Structure, (Revised in March 2012), Architectural Institute of Japan, Tokyo, Japan.
  3. Chen, C., Lu, T., Chen, H.Y. and Tian, L.C. (2013), "The Finite Element Analysis of Tower Crane Safety Performance", Appl. Mech. Mater., 405-408, 1135-1158 https://doi.org/10.4028/www.scientific.net/AMM.405-408.1135
  4. Gu, Y.Q. and Mao, C.F. (2013), "The preliminary analysis on tower crane by earthquake effect", Appl. Mech. Mater., 353-356, 1892-1895 https://doi.org/10.4028/www.scientific.net/AMM.353-356.1892
  5. Huang, L.J. and Syu, H.J. (2014), "Seismic Response Analysis of Tower Crane Using SAP2000", Procedia Engineering, 79, 513-522 https://doi.org/10.1016/j.proeng.2014.06.374
  6. JCAS1101 (2018), Seismic Design Guideline for Cranes, the Japan Crane Association (JCA); Tokyo, Japan.
  7. Loh, C.H., Tsai, K.C., Chung, L.L. and Yeh, C.H. (2003), "Reconnaissance report on the 31 March 2002 earthquake on the east coast of Taiwan", Earthq. Spectra, 19(3), 531-556. https://doi.org/10.1193/1.1598438
  8. LS-DYNA KUM I (2016), LS-DYNA Keyword User's Manual Volume I (LS-- DYNA R8.0), JSOL Corporation, Tokyo, Japan.
  9. LS-DYNA KUM II (2016), LS-DYNA Keyword User's Manual Volume II (LS-DYNA R8.0), JSOL Corporation, Tokyo, Japan.
  10. Mizushima, Y., Mukai, Y., Namba, H., Taga, K. and Saruwatari, T. (2018), "Super detailed FEM simulations for full-scale steel structure with fatal rupture at joints between members - Shaking table test of full-scale steel frame structure to estimate influence of cumulative damage by multiple strong motion: Part 1", Jpn. Archit. Rev.,1(1), 96-108 https://doi.org/10.1002/2475-8876.10016
  11. Ushio, Y., Okano, M. and Nagano, Y. (2017), "The earthquake response of climbing-type tower cranes installed in high-rise buildings in consideration of various situation under construction", Proceedings of 16th World conference on Earthquake Engineering, Santiago, Chile, January.
  12. Zrnic, N.D., Bosnjak, S.M., Gasic, V.M., Arsic, M.A. and Petkovic, Z.D. (2011), "Failure analysis of the tower crane counterjib", Procedia Eng., 10(2011), 2238-2243. https://doi.org/10.1016/j.proeng.2011.04.370

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