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Matériaux et Construction

, Volume 7, Issue 5, pp 315–318 | Cite as

Deflections of reinforced concrete grids

  • P. Desayi
  • K. Muralidharan
Article
  • 59 Downloads

Abstract

The paper presents the deflections of two reinforced concrete grid specimens, the overall dimensions of which correspond approximately to one-tenth scale of a two-lane highway bridge deck of 30 meter span. The grids had three beams and five cross girders. Of the two specimens tested, one was with top slab and the other without a top slab. The specimen with slab was so loaded that each end beam was subjected to a distributed load which was 150% of the load on the central beam. The specimen without top slab was so loaded that each end beam was subjected to a load which was 50% of the load on the central beam. The deflections were computed using Hendry-Jaeger method and with appropriate flexural and torsional rigidities of the cross-sections of the beams and cross girders. The computed deflection are found comparable with the experimetal ones in the range of service loads.

Keywords

Ultimate Load Flexural Rigidity Central Beam Torsional Rigidity American Concrete Institute 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

On traite des déformations de deux modèles de grilles de poutres en béton armé, les dimensions globales de chaque grille étant à l'échelle approximative d' 1/10 par rapport au tablier d'un pont rail à deux voies d'une portée de 30 m. Ces grilles comportainent trois poutres principales et cing traverses. L'un des deux modèles présentait une dalle supérieure, et l'autre non. Le modèle à dalle a été chargé de telle sorte que chaque extrémité de pouîre était soumise à une répartition de charge d'environ 150 % de la charge exercée sur la poutre centrale, tandis que pour le modèle sans dalle supérieure la charge exercée en bout de poutre était de 50 % de celle appliquée à la poutre centrale. Les déformations ont été calculées par la méthode Hendry-Jaeger et avec des rigidités appropriées en flexion et en torsion des sections transversales des poutres et des traverses. On constate que les déformations calculées sont comparables à celles déterminées expérimentalement dans l'intervalle des charges de service.

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References

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Copyright information

© Secrétariat de Rédaction 1974

Authors and Affiliations

  • P. Desayi
    • 1
  • K. Muralidharan
    • 2
  1. 1.Civil Engg. Dept.Indian Institue of ScienceBangaloreIndia
  2. 2.Structural Engineering Research (Regional) CentreMadrasIndia

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