Structural Engineering and Mechanics

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Retrofitting reinforced concrete beams by bolting steel plates to their sides -Part 2: Transverse interaction and rigid plastic design

  • Oehlers, Deric John (Department of Civil and Environmental Engineering, The University of Adelaide) ;
  • Ahmed, Marfique (Department of Civil and Environmental Engineering, The University of Adelaide) ;
  • Nguyen, Ninh T. (Department of Civil and Environmental Engineering, The University of Adelaide) ;
  • Bradford, Mark Andrew (Department of Structural Engineering, University of New South Wales)
  • Published : 2000.09.25
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Abstract

In a companion paper, tests on bolted side plated beams have shown that side plates can substantially increase the strength of existing reinforced concrete beams with little if any loss of ductility and, furthermore, induce a gradual mode of failure after commencement of concrete crushing. However, it was also shown that transverse interaction between the side plates and the reinforced concrete beam, that is vertical slip and which is a concept unique to side plated beams, is detrimental. Transverse interaction increases the forces on the bolt shear connectors and, hence, weakens the beam. It also reduces the ability of the composite plated beam to yield and, hence, to attain its full flexural capacity. The generic concept of transverse interaction will be described in this paper and the results used to develop a new form of rigid plastic analysis for bolted side plated beams which is illustrated with an application.

Keywords

References

  1. Ahmed, M. (1996), "Strengthening of reinforced concrete beams by bolting steel plates to their sides", Master of Engineering Science Thesis, The University of Adelaide, Australia, October.
  2. Ahmed, M., Oehlers, D.J. and Bradford, M.A. (2000), "Retrofitting reinforced concrete beams by bolting steel plates to their sides. Part 1: Behaviour and experimental work", Structural Engineering and Mechanics, Int'l Journal, 10(3).
  3. Oehlers, D.J. and Sved, G. (1995), "Flexural strength of composite beams with limited slip capacity shear connectors", Journal of Structural Engineering, ASCE, 121(6), Jun., 932-938. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:6(932)
  4. Oehlers, D.J., Nguyen, N.T., Ahmed, M. and Bradford, M.A. (1997), "Transverse and longitudinal partial interaction in composite bolted side-plated reinforced-concrete beams", Structural Engineering and Alechanics, An Int'l Journal. 5(5), Sept., 553-564.
  5. Smith, S.T., Bradford, M.A. and Oehlers, D.J. (1999a), "Local buckling of side-plated reinforced concrete beams. Part 1: Theoretical study", ASCE, Journal of Structural Engineering, June 622-634.
  6. Smith, S.T., Bradlord, M.A. and Oehlers, D.J. (1997b), "Local buckling side-plated reinforced concrete beams. Part 2: Experimental study", ASCE, Journal of Structural Engineering, June 635-643.

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