Skip to main content
SpringerLink
Log in

Behaviour of ferrocement confined reinforced concrete (FCRC) under axial compression

  • Scientific Reports
  • Published:
Materials and Structures Aims and scope Submit manuscript

Abstract

An experimental investigation on the behaviour of ferrocement confined reinforced concrete (FCRC) under axial compression, by varying the specific surface factor (Sf) which controls the behaviour of ferrocement, is presented. A total of 270 prisms of size 150×150×300 mm were tested. The results indicated that additional confinement in the form of ferrocement shell improved the ultimate strength, strain at ultimate strength and the ductility of concrete. The improvement is in proportion to the Sf of the ferrocement shell for a given confinement index (Ci) of the lateral reinforcement.

Résumé

Une investigation expérimentale sur le comportement du béton armé d'un ferro-ciment confiné soumis à une compression axiale, par le biais d'un variation du facteur de surface spécifique (Sf), facteur qui sert à maîtriser le comportement du ferro-ciment, est présentée. Un total de 270 prismes d'une dimension de 150×150×300 mm a été testé. Les résultats démontrent qu'un confinement supplémentaire de la structure en ferro-ciment améliore la résistance ultime, la déformation à la résistance ultime et la ductilité du béton. L'amélioration ainsi obtenue est proportionnelle à la valeur Sf de la structure en ferro-ciment pour un indice de confinement (Ci) de l'armature latérale donnée.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Abbreviations

b,d:

Lateral dimensions of prism

fy :

Yield strength of longitudinal tie/mesh steel (Table 1)

As :

Area of longitudinal steel

f′c :

Strength of unconfined concrete

ε′c :

Strain at ultimate of unconfined concrete

fcb :

Strength of tie confined concrete [7]=(1+0.55 Ci) f′c

εcb :

Strain at ultimate of tie confined concrete=(1+5.2 Ci) ε′c

Ag:

Gross cross-sectional area

Kt and Kf :

Coefficients as explained in the paper

Ci :

Confinement index

Pb :

Ratio of the volume of transverse steel to the volume of concrete

Pbb :

Ratio of volume of the transverse steel to the volume of concrete corresponding to a limiting pitch equal to 1.5b

fv :

Stress in the lateral ties

s:

Spacing of ties

εcf :

Strain at ultimate of FCRC

ε0.85cf :

Strain at 85% of ultimate of FCRC in the descending portion of the stress-strain curve

fcf :

Ultimate strength of FCRC

References

  1. Baker, A.L.L., ‘The ultimate load theory applied to the design of reinforced and prestressed concrete frames’ (Concrete Publications Ltd., London, 1956).

    Google Scholar 

  2. Balaguru, P, ‘Use of ferrocement for confinement of concrete’, Proc. Third Int. Conf. on Ferrocement, Roorkee (India), 296–305.

  3. Ganesan, N. and Anil, J., ‘Strength and behaviour of RC columns confined by ferrocement’,Jl of Ferrocement 23 (2) 99–108.

  4. Paulay, T. and Priestley, M.J.N., ‘Seismic design of reinforced concrete and masonry buildings’ (John Wiley and Sons, New York, 1992).

    Book  Google Scholar 

  5. Rao, A.K., Reddy, K.N., and Reddy, V. M., ‘Effect of stirrup confinement on flexural behaviour of prestressed concrete simple beams’,Journal of IE (India) 59 Part-I 258–266.

  6. Rao, C.B.K. and Rao, A.K., ‘Stress strain curve in axial compression and Poisson's ratio of ferrocement’,Jl. of Ferrocement 16 (2) 117–128.

  7. Reddy, S.R., ‘Behaviour of concrete confined in rectangular binders and its application in flexure of reinforced concrete structures’, Thesis submitted to J.T. University, Hyderabad (India), for Ph.D. Degree, February 1974.

  8. Seshu, D.R., ‘Behaviour of concrete confined with ferrocement shell in addition to rectangular stirrups and its application in flexure of RC structures’, Ph.D. Thesis submitted to Kakatiya University, Warangal (India) 1995.

  9. Sheikh, S.A., ‘Comparative study of confinement models’,Journal of ACI 79 (4) 296–306.

  10. Waliudin, A.M. and Rafeeqi, S.F.A., ‘Study of behaviour of plain concrete confined with ferrocement’,Jl of Ferrocement 24 (2) 139–145.

Download references

Author information

Authors and Affiliations

  1. Department of Civil Engineering, 506 004, AP, Warangal, India

    D. R. Seshu (Asst. Prof.)

  2. Regional Engineering College, 506 004, AP, Warangal, India

    A. K. Rao (Prof.)

Authors
  1. D. R. Seshu
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. K. Rao
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Seshu, D.R., Rao, A.K. Behaviour of ferrocement confined reinforced concrete (FCRC) under axial compression. Mat. Struct. 31, 628–633 (1998). https://doi.org/10.1007/BF02480614

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02480614

Keywords

Search

Navigation