Steel and Composite Structures

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The behaviour of a new type of connection system for light-weight steel structures applied to roof trusses

  • Kaitila, Olli (Laboratory of Steel Structures, Department of Civil and Environmental Engineering Helsinki University of Technology) ;
  • Kesti, Jyrki (Laboratory of Steel Structures, Department of Civil and Environmental Engineering Helsinki University of Technology) ;
  • Makelainen, Pentti (Laboratory of Steel Structures, Department of Civil and Environmental Engineering Helsinki University of Technology)
  • Published : 2001.03.25
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Abstract

The Rosette-joining system is a completely new press-joining method for cold-formed steel structures. One Rosette-joint has a shear capacity equal to that of approximately four screws or rivets. The Rosette thin-walled steel truss system presents a new fully integrated prefabricated alternative to light-weight roof truss structures. The trusses are built up on special industrial production lines from modified top hat sections used as top and bottom chords and channel sections used as webs which are joined together with the Rosette press-joining technique to form a completed structure easy to transport and install. A single web section is used when sufficient but can be strengthened by double-nesting two separate sections or by using two lateral profiles where greater compressive axial forces are met. An individual joint in the truss can be strengthened by introducing a hollow bolt into the joint hole. The bolt gives the connection capacity a boost of approximately 20%. A series of laboratory tests have been carried out in order to verify the Rosette truss system in practice. In addition to compression tests on individual sections of different lengths, tests have also been done on small structural assemblies and on actual full-scale trusses of a span of 10 metres. Design calculations have been performed on selected roof truss geometries based on the test results, FE-analysis and on the Eurocode 3 and U.S.(AISI) design codes.

Keywords

References

  1. ABAQUS/Standard User's Manual Version 5.7 (1997), Hibbitt, Karlsson & Sorenssen, Inc., U.S.A.
  2. AISI (1996), Specification for the Design of Cold-Formed Steel Structural Members, American Iron and Steel Institute 1996.
  3. ENV 1993-1-3 Eurocode 3: Design of Steel Structures: Part 1.3: Supplementary rules for cold-formed thin gauge members and sheeting, CEN February 1996.
  4. Kaitila, O. (1998), "Design of cold-formed steel roof trusses using Rosette - connections", Master's Thesis, Helsinki University of Technology, Espoo, Finland.
  5. Kaitila, O. and Makelainen, P. (1998), Second Full Scale Truss Test on a Rosette-joined Roof Truss, Helsinki University of Technology Laboratory of Steel Structures Publications TeRT-98-04, Espoo, Finland.
  6. Kesti, J. and Makelainen, P. (1999), "T-joint shear tests for Rosette-joint with Rosette tube bolt", Helsinki University of Technology Laboratory of Steel Structures, Research Report TKK-TeRT-99-04, Espoo, Finland.
  7. Kesti, J., Lu, W. and Makelainen, P. (1998), "Shear tests for Rosette connection", Helsinki University of Technology, Laboratory of Steel Structures, Research Report TeRT-98-03, Espoo, Finland.
  8. NISA (1996), User's Manual, Version 6.0, Engineering Mechanics Corporation (EMRC), Michigan.
  9. SFS-ENV 1991-1 Eurocode 1: Suunnitteluperusteet ja rakenteiden kuormat, Osa 1: Suunnitteluperusteet (Eurocode 1: Basis of design and actions on structures, Part 1: Basis of design), Suomen Standardoimisliitto SFS 1994 (In Finnish).
  10. SFS-ENV 1991-2-3 Eurocode 1: Suunnitteluperusteet ja rakenteiden kuormat, Osa 2-3: Rakenteiden kuormat. Lumikuormat. (Eurocode 1: Basis of design and actions on structures, Part 2-3: Actions on structures, Snow loads), Suomen Standardoimisliitto SFS 1995 (In Finnish).
  11. STAAD Pro Reference Manual (2000), Research Engineers, Inc., U.S.A.
  12. Suomen Rakentamismaarayskokoelma, Kansallinen soveltamisasiakirja Eurocode 1 (National Building Code of Finland, National Application Document for Eurocode 1), Ymparistoministerio 1995 (In Finnish).

Cited by

  1. Novel pin-jointed connection for cold-formed steel trusses vol.116, 2016, https://doi.org/10.1016/j.jcsr.2015.08.009
  2. Experimental Investigation on Wide-Span Cold-Formed Steel Roof Truss System vol.166-169, pp.1662-7482, 2012, https://doi.org/10.4028/www.scientific.net/AMM.166-169.1304
  3. Novel pin jointed moment connection for cold-formed steel trusses vol.31, pp.5, 2001, https://doi.org/10.12989/scs.2019.31.5.453