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Effect of Lateral Confinement on Strength of Concrete

Author Affiliations

  • 1Structural Engineering, Jabalpur Engineering College, Jabalpur, MP, INDIA
  • 2Department of Civil Engineering, Jabalpur Engineering College, Jabalpur, MP, INDIA
  • 3Department of Civil Engineering, Jabalpur Engineering College, Jabalpur, MP, INDIA

Res. J. Engineering Sci., Volume 1, Issue (1), Pages 40-44, July,26 (2012)

Abstract

In columns or compression members, lateral reinforcement in the form of hoops, cross-ties, or spirals play an important role in safeguarding the columns, especially when they are subjected to strong earthquakes or accidental lateral loads. They are required in any column-whether they are parts of a moment resistant frame or the gravity system in order for them to deform laterally and provide the required ductility. This paper deals with studies on the compressive strength of concrete specimens having confinement in various quantities. Studies on reinforced cement concrete specimens were used to understand the influence of the lateral confinement on the compressive strength of concrete. Cylindrical and square test specimens having height to diameter (or width) ratio as 2 were used for the study. The specimen was prepared with different spacing of hoops and having seismic and non-seismic hooks. This paper deals with the variation of peak strength with volumetric ratio of transverse steel to confined concrete core.

References

  1. Sheikh S.A. and Uzumeri S.M.,, Analytical Model for Concrete Confinement in Tied Columns., ASCE Journal of Structural Engineering, 108(12), (1982)
  2. Saatcioglu M. and Razvi S.R.,, High-Strength Concrete Columns with Square Sections under Concentric Compression., ASCE Journal of Structural Engineering, 124(12), 1438-1447 (1988)
  3. Cusson D. and Paultre P.,, High-Strength Concrete Col-Lanns Confined by Rectangular Ties., ASCE Journal of Structural Engineering, 120(3), 783-804 (1994)
  4. Mander J.B., Priestley M.J.N. and Park R.,, Theoretical Stress-Strain Model for Confined Concrete., ASCE Journal of Structural Engineering, 114(2), 1804-1825 (1992)
  5. Sheikh S.A. and Uzumeri S.M.,, Strength and Ductility of Tied Concrete Columns., ASCE Journal of Structural Engineering, 1079-1102 (1980)
  6. Mander J.B., Priestly M.J.N. and Park R.,, Observed Stress Strain Behavior for Confined Concret., Journal of Structural Engineering, ASCE, 114(8), 1827-1849 (1988)
  7. Saatcioglu M. and Razvi S.R.,, Strength and Ductility of Confined Concrete., ASCE Journal of Structural Engineering, 118 (6), (1992)
  8. www.iitk.ac.in/EQTip19.pdf (2012), undefined, undefined
  9. ACI,, Building Code Requirements for Reinforced Concrete (ACI 318-99)., ACI Committee 318, American Concrete Insti¬tute, (1999)
  10. IS, 13920: 1993 (Reaffirmed 1998) Edition 1.2., Ductile Detailing Of Reinforced Concrete Structures Subjected To Seismic Forces — Code of Practice (2003).
  11. Nagashima T., Sugano S., Kimura H. and Ichikawa A.,, Monotonic Axial Compression Test on Ultra-Strength Concrete Tied Columns., Proc. 10th World Conference on Earthquake Engineering, 2983-2988 (1992)
  12. Scott B.D., Park R. and Priestley M.J.N.,, Stress-Strain Behavior of Concrete Confined by Overlapping Hoops at Low and High Strain Rates., AC1 Structural Journal, 79(2), (1982)
  13. Němeček J., Padevět P. and Bittnar Z.,, Acta Polytechnica., 44 (5), 2004