Vol. 21 No. 3 (2018) Cover Image
Vol. 21 No. 3 (2018)

Published: September 30, 2018

Pages: 393-404

Articles

Experimental Investigation on Behavior of Composite Open Web Steel Joists

Ali Farhan Hadeed 1 Laith Khalid Al-Hadithy 2 Riyadh J. Aziz 3
1 Building and Construction Technology Eng. Dep., Al-Esra'a University College, Baghdad, IRAQ
2 Civil Engineering Dep., Al-Nahrain University, Baghdad, IRAQ
3 Architecture Dep., Al- Esra'a University College, Baghdad, IRAQ
History
  • Received: October 26, 2017
  • Revised: January 3, 2018
  • Accepted: June 27, 2018
  • Available Online: September 1, 2018
DOI

https://doi.org/10.29194/NJES.21030393

Abstract

The composite opened web steel joist supported floor systems have been common for many years. It is economic and has light weight and can embed the electrical conduit, ductwork and piping, eliminating the need for these to pass under the member, consequently eliminate the height between floors. In order to study the joist strength capacity under the various conditions, it had been fabricated seven joists composed of the steel and concrete slab connected to the top chord by shear connectors (headed studs). These joist have 2820 mm length c/c of the supports and 235 mm overall depth. In the present study, six variable parameters are adopted (Studs distribution, Degree of shear connection, Degree of the web inclination, Shape of the web, Density of concrete for slab and length of the shear connector). The test results exhibited that minimum strength capacity was 160kN for light weight joist and maximum capacity was 225kN for joist of long shear connectors at failure. The results were compared by ultimate flexural model by Azmi.

Keywords

References

  1. Oehlers, D.J. and Bradford, M. A., "Elementary Behavior of Composite Steel and Concrete Structural Members", Butterworth Heinemann, 1999, London, 259 p.9.
  2. Jamal, A.F., "Development of Three- Layers Composite – Concrete Steel Beam Element with Application", Ph.D. Dissertation, University of Technology, June, 2009.
  3. David Samuelson, "Composite Steel Joists", Engineering Journal / Third Quarter, 2002, 111 p.
  4. Supplement No 1," Standard specifications for Composite steel Joists and code of standard practice", Steel Joist institute (SJI), Vol. 32, Dec., 2010.
  5. Douglas F. Lauer," Ultimate strength analysis of composite and fully composite open - web steel joists", M.Sc. Thesis, Virginia Polytechnic Institute and state University, October, 1994.
  6. AISC, "Steel Construction Manual", American Institute of Steel Construction, Chicago, Thirteenth Ed., IL, 2005.
  7. BS 5400: Part 5, "Design of composite bridges", British standards institution, London 1979.
  8. ENV 1994-2," Euro Code - 4; " Design of Composite Steel and Concrete Structure, Part 2; General Rules for Bridges ", CEN; 1997.
  9. Mark Lawson and Peter Wickens,"Steel Designers' Manual – Chapter Composite Beams", 6th Edition, 2003.
  10. Colaco, J. P. "A Stub-Girder System for High-Rise Buildings." AISC Engineering Journal, 1972, pp. 89-95.