Materials and Structures

, 23:449 | Cite as

Bearing capacity of a bar under transversal loads

  • L. Biolzi
  • E. Giuriani
Article

Abstract

In this paper the problem of the local resistance of concrete around a stud connector or a bar acting as a dowel is studied. A specific test was carried out to simulate a real situation of a generic thin layer of concrete pierced through by the bar. The local concrete deformation produced by the pressure of a transversally loaded bar was analysed using the moiré technique. The experimental curve between the load and the transversal displacement of the bar shows a behaviour which could be idealized in an elastic-plastic relationship. The bearing capacity of the concrete turns out to be about five times the cylindrical strength.

Keywords

Pile Foundation Shear Connector Collapse Load Failure Line Moir6 Fringe 

Résumé

Dans cet article on étudie le problème de la résistance du béton localisée autour d'un goujon ou d'une barre servant de goujon. On a entrepris un essai spécial dans le but de simuler la situation réelle d'une couche mince représentative de béton traversée par une barre. On a analysé au moyen du moiré les déformations locales du béton provoquées par la pression d'une barre chargée transversalement.

La courbe expérimentale de la charge en fonction du déplacement transversal de la barre peut être idéalisée en une relation élasto-plastique. La capacité portante du béton équivaut à environ cinq fois la résistance cylindrique.

References

  1. 1.
    Johnston, D. W. and Zia, P., ‘Analysis of dowel action’,J. Struct. Div., ASCE 97 (ST5) (1971) 1611–1630.Google Scholar
  2. 2.
    Fardis, M. N. and Buyukozturk, O., ‘Shear transfer model for reinforced concrete’,J. Engng Mech. Div., ASCE 105 (EM2) (1979) 255–275.Google Scholar
  3. 3.
    Hetenyi, M., ‘Beams on Ealstic Foundation’, (University of Michigan Press, Ann Arbor, 1946).Google Scholar
  4. 4.
    Friberg, B. F., ‘Design of dowels in transverse joints of concrete pavements’,Proc. ASCE 64 (9) (1988) 1809–1928.Google Scholar
  5. 5.
    Wiedenroth, M., ‘Einspanntiefe und Zulassige Belastung eines in einen Betonkorper eingespannten Stabes’,Bautechnik 12 (1971) 426–429.Google Scholar
  6. 6.
    Rybicki, R., ‘Abscherbelastung einbetonierter Bolzen’,Bau und Bauindustrie 4 (1971).Google Scholar
  7. 7.
    Utescher, G., ‘Beurteilungsgrundlagenfur Fassadenverankerungen’ 1st Edn (Ernst, Berlin, 1978).Google Scholar
  8. 8.
    Rasmussen, H. B., ‘Betonindstobte tvaer belastede boltes of dornes baereevne’ (Kobenhavn: Bygningstatiske Meddelser, Copenhagen, 1963).Google Scholar
  9. 9.
    Paschen, H. and Schonhoff, T., ‘Untersuchungen uber in Beton eingelassene scherbolzen aus Betonstahl’, in ‘Deutscher Ausschuss fur Stahlbeton’, Heft 346 (Berlin, 1983) pp. 105–155.Google Scholar
  10. 10.
    Vintzeleou, E. and Tassios, T. P., ‘Mechanisms of load transfer along interfaces in reinforced concrete: prediction of shear force vs. shear displacement curves’,Studi e Ricerche, Corso di Perfezionamento per le Costruzioni in C.A. F.lli Pesenti, Politecnico di Milano 7 (1985) 121–161.Google Scholar
  11. 11.
    Idem,, ‘Mathematical models for dowel action under monotonic and cyclic conditions’,Mag. Concr. Res. 38 (134) (1986) 13–22.CrossRefGoogle Scholar
  12. 12.
    Paulos, H. G. and Davis, E. H., ‘Pile Foundation Analysis and Design’, 1st Edn (Wiley, New York, 1980), Ch. 7.Google Scholar
  13. 13.
    Gelfi, P. and Giuriani, E., ‘Theoretical constitutive law for stud shear connectors’,Studi e Ricerche Corso di Perfezionamento delle Costruzioni in C.A. F.lli Pesenti, Politecnico di Milano 9 (1987) 323–343 (in Italian).Google Scholar
  14. 14.
    Giuriani, E. and Grisanti, A., ‘Behaviour of stud connectors under repeated loads’,ibid. 8 (1986) 271–305 (in Italian).Google Scholar
  15. 15.
    Tassios, T. P. and Koroneas, E. G., ‘Local bond-slip relationships by means of the moiré method’,ACI J., Proc. 81 (January–February) (1984) 27–34.Google Scholar
  16. 16.
    Giuriani, E. and Ronca, P., ‘The crack pattern in a R.C. beam analyzed by means of the optical interferometry’, Atti VII Convegno Nazionale AIAS, Cagliari, September 1979, 6.1–6.15 (in Italian).Google Scholar
  17. 17.
    Giuriani, E. and Gelfi, P., ‘A study of slip zone propagation at bar-to-concrete interface in cracked concrete’,Studi e Ricerche, Corso di Perfezionamento delle Costruzioni in C.A. F.lli Pesenti, Politecnico di Milano 4 (1982) 57–83 (in Italian).Google Scholar
  18. 18.
    Giuriani, E. and Rosati, G., ‘Experimental investigation on R.C. elements subjected to a single crack-analysis of the unstable branches of the moment—rotation relationship’,ibid. 6 (1986) 151–201 (in Italian).Google Scholar

Copyright information

© RILEM 1990

Authors and Affiliations

  • L. Biolzi
    • 1
  • E. Giuriani
    • 2
  1. 1.Istituto di Meccanica Teorica ed Applicata, Facoltà di IngegneriaUniversità di UdineUdineItaly
  2. 2.Dipartimento di Ingegneria Civile, Facoltà di IngegneriaUniversità di BresciaBresciaItaly

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