Structural Engineering and Mechanics

  • 제6권6호
  • /
  • Pages.693-710
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  • 1998
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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Studies on post-tensioned and shaped space-truss domes

  • Schmidt, Lewis C. (Department of Civil and Mining Engineering, University of Wollongong) ;
  • Li, Hewen (Department of Civil and Mining Engineering, University of Wollongong)
  • 발행 : 1998.09.25
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초록

This paper concerns studies on the shape formation of post-tensioned and shaped steel domes. The post-tensioned and shaped steel domes, assembled initially at ground level in an essentially flat condition, are shaped to a curved space form and erected into the final position by means of a post-tensioning technique. Based on previous studies on this shape formation principle, three post-tensioned and shaped steel domes have been constructed. The results of the shape formation tests and finite element analyses are reported in this paper. It is found that the first two test domes did not furnish a part-spherical shape as predicted by finite element analyses, because the movements of some mechanisms were not controlled sufficiently. With a revised post-tensioning method, the third dome obtained the theoretical prediction. The test results of the three post-tensioned and shaped domes have shown that a necessary condition to form a desired space shape from a planar layout with low joint stiffnesses is that the movements of all the existing mechanisms must be effectively controlled as indicated by the finite element analysis. The extent of the maximum elastic deformation of a post-tensioned and shaped steel structure is determined by the strength of the top chords and their joints. However, due to the semi-rigid characteristic of the top chord joints, the finite element analyses cannot give a close prediction for the maximum elastic deformations of the post-tensioned and shaped steel domes. The results of the current studies can be helpful for the design and construction of this type of structure.

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참고문헌

  1. Calladine, C.R. (1978), "Buckminster Fullers tensegrity structures and Clerk Maxwells rule for the construction of stiff frames", Int. J. of Solids Structures, 14(3), 161-172. https://doi.org/10.1016/0020-7683(78)90052-5
  2. Li, H. and Schmidt, L.C. (1997), "Post-tensioned and shaped hypar trusses", J. of Structural Engineering, ASCE, 123(2), 130-137. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:2(130)
  3. MSC/NASTRAN User's Manual; Version 68. (1995). The MacNeal-Schwendler Corporation, Los Angeles, California, USA.
  4. Schmidt, L.C. (1989), "Erection of space trusses of different forms by tensioning of near mechanisms", Proc. of lASS Congress, 4, Madrid, Spain.
  5. Schmidt, L.C. and Li, H. (1995a), "Geometric models of deployable metal domes", J. of Architectural Engineering, ASCE, 1(3), 115-120. https://doi.org/10.1061/(ASCE)1076-0431(1995)1:3(115)
  6. Schmidt, L.C. and Li, H. (1995b), "Shape formation of deployable metal domes", Int. J. of Space Structures, 10(4), 189-194. https://doi.org/10.1177/026635119501000401

피인용 문헌

  1. Axial behaviour of prestressed high strength steel tubular members vol.133, 2017, https://doi.org/10.1016/j.jcsr.2017.03.002
  2. Tensile performance of prestressed steel elements vol.79, 2014, https://doi.org/10.1016/j.engstruct.2014.08.009