Steel and Concrete Elasto-Plastic Models at Bridges with Steel Beams Embedded in Concrete

Stănescu Răzvan Marian 1
  • 1 Faculty of Railways, Roads and Bridges, Technical University of Civil Engineering Bucharest, Romania

Abstract

For new railway bridges with short spans (L ≤ 35.00 m) superstructures with steel beams embedded in concrete are recommended or used, which can ensure the requirements of strength and stiffness in particular, regardless of velocity. They are built relatively easily compared to reinforced concrete structures or steel structures, they have high durability if designed, built and maintained correctly and don’t have high sensitivity to fatigue degradation in service. They are also used for road bridges when it is desired to achieve a reduced construction height.

In all the design prescriptions used so far for structures with steel beams embedded in concrete, the calculation is a simplified one, made on a single insulated longitudinal beam of the deck, if certain conditions related to the geometry of the structure are met (obliquity, curvature). Simplifications are also made regarding the state of deformation of the decks made in this constructive solution by introducing an effective moment of inertia in the displacement calculation, as an average of the inertia moments of the cross section considered to be cracked and respectively un-cracked.

The article aims to validate steel and concrete elasto-plastic models, based on an experiment from the technical literature, necessary for complex analyses of the percentage of concrete involved in the stiffness of the cross-sections, in case of bridges with steel beams embedded in concrete.

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  • [1]. ***, “UIC Code 773-4 R”, International Union of Railways, F-75015 Paris, 1997

  • [2]. ***, EN 1992-1-1:2004, “Eurocode 2: Design of concrete structures - Part 1: General rules and rules for buildings”, 2004

  • [3]. ***, EN 1994-2:2005, Eurocode 4: Design of composite steel and concrete structures – Part 2: General rules and rules for bridges, 2005

  • [4]. Kvočák V., Tomko M., Kožlejová V., “Modelling of Encased Steel Beams in Abaqus Program” - INES 2013 - IEEE 17th International Conference on Intelligent Engineering Systems - June 19-21, 2013, Costa Rica

  • [5]. ***, “Element Reference Manual”, LUSAS Finit Element Analysis, Version 15.0

  • [6]. Jefferson A.D., “Craft, a plastic-damage-contact model for concrete. Part II – Model implementation with implicit return-mapping algorithm and consistent tangent matrix”, International Journal of Solids and Structures, Vol. 40, No. 22, 2003

  • [7]. Bazant Z. P., Oh B. H., “Crack band theory for fracture of concrete”, Materials and Structures (RILEM, Paris), Vol. 16, 1983

  • [8]. Carol I., Bazant Z. P., “New developments in micro-plane and multicrack models for concrete”, In Proceedings of FRAMCOS2, ed. Wittmann, F. H. Aedificatio, Germany, 1995

  • [9]. De Borst R., Nauta P., “Non-orthogonal cracks in a smeared finite element model”, Engineering and Computations, Vol. 2, 1985

  • [10]. Stănescu R.M., “Study of influence of the track curvature and supports obliquity at railway bridge structures with steel beams embedded in concrete”, PhD. Thesis, T.U.C.E. Bucharest, Romania, 2016

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