Construction and Calculation of Reinforced Concrete Overlap with A High Spatial Work Effect

  • Abstract
  • Keywords
  • References
  • PDF
  • Abstract

    The article proposes the construction of a prefabricated monolithic reinforced concrete overlap consisting of beams hollow triangular section. It is shown that in such overlap the effect of spatial work is much higher than the analogous effect in traditional overlap that consists of U-shaped or T-beams and slabs. The technique of determining the forces of interaction of individual beams in the composition of the overlap is given. The technique is based on a discrete-continual method developed by the author, which is adapted to the calculation of overlaps that consist of considered beams. The technique of determining the effort between the shelf and the ribs of a beam during its bending is presented. It is based on the theory of compound rods. The algorithm of calculation taking into account the spatial work is presented as well as the principles of constructing overlaps consisting of beams hollow triangular section, taking into account the change in their rigidity as a result of cracks formation. An approach to the determination of the rigidity of beams with normal torsion fractures is given, based on the approximation of numerical experimental data.



  • Keywords

    approximation, bending, overlap, rigidity, spatial work, torsion.

  • References

      [1] ACI 318-11, Building Code Requirements for Structural Concrete and Commentary (ACI 318M-11), American Concrete Institute, Farmington Hills, 2011.

      [2] Azizov, T. Effect of torsional rigidity of concrete elements with normal cracks onto special work of bridges and overlaps / T. Azizov // International science Ukrainian edition. – USA – December, 2010. – P.55-59.

      [3] Azizov T.N. Ekonomichniye konstruktsii pokritiy I perekritiy / T.N. Azizov.- Uman: Almi, 2002. 64 p.

      [4] Azizov T.N. Prostranstvennaya rabota zhelezobetonnyh perekrytij. Teoriya i metody rascheta [Spatial work of concrete overlaps. The theory and techniques for calculation], 2006.

      [5] Baikov V.N. Precast reinforced concrete slabs under longitudinal strip loads // Jndian concrete Journal. – 1963. – August. – P.302-305

      [6] Cowan H.J., Kruchenie v obychnom i predvaritel’no napriazhennom zhelezobetone [Torsion in the ordinary and prestressed reinforced concrete], Strojizdat, Moscow, 1972.

      [7] EN 1992: Eurocode 2: Design of concrete structures – Part 1: General rules and rules for buildings. – Brussels, 2002. – 230 p.

      [8] Kalenchuk-Porkhanova A.A. Paket programm approksimatsii funktsiy / A.A. Kalenchuk-Porkhanova // Kompyuterni zasobi, merezhi ta sistemi. — 2008. — № 7. — P. 32-38.

      [9] Karpenko N.I. Obshiye modeli mekhaniki zhelezobetona / N.I. Karpenko. – Moskva, 1996. – 416 p.

      [10] Luís L.F.A. Behaviour of concrete beams under torsion: NSC plain and hollow beams// Bernardo L.F.A., Sérgio M. R. Lopes. Materials and Structures. July 2008, Volume 41, Issue 6, pp. 1143-1167.

      [11] M. Knauff, A. Golubińska, P. Knyziak, Tablice i wzory do projektowania konstrukcji żelbetowych z przykładami obliczeń, Wydanie II, Wydawnictwo Naukowe PWN, 2014.

      [12] Pierre Lutrin, Christian Delvaux. Resultates de recherches sur des elements de plancher en beton precontraint pour betiment // Annales de l’institut Technique du Betiment et des Travaux Publics. – 1977. – Octobre. – № 354. – 54-74 p.

      [13] Rzhanitsyn A.R. Sostavnyye sterzhni i plastinki / A.R. Rzhanitsyn. – Moskva: Stroyizdat, 1986. – 316 p.

      [14] Wight, James K. Reinforced concrete : mechanics and design / James K. Wight, F.E. Richart, Jr., James G. Macgregor. - NJ, 2012. - 1157 p.




Article ID: 14591
DOI: 10.14419/ijet.v7i3.2.14591

Copyright © 2012-2015 Science Publishing Corporation Inc. All rights reserved.