Shrinkage Effect on Shear Strength of Reinforced, High Strength Concrete Beams

An investigation of autogenous shrinkage's effect on reinforced high strength concrete beams' shear strength is presented, in which shear beam distance from reinforcing bar centroid to compressive fiber (effective depth) of 1,000, 500 and 250 mm are prepared of high autogenous shrinkage and low or expansive-autogenous shrinkage high strength concrete with a respective 0.23 water to binder ratio. Reinforced autogenous shrinkage high strength concrete beam diagonal cracking shear strength is shown through test results to have a 5-18% decrease when compared with that of reinforced expansive or low autogenous shrinkage high strength concrete beams. The former's ultimate shear strength is also 20-45% lower than the latter's, in which there is observation of the failure mode's differences as well as size effect. A new equivalent tension reinforcement ratio concept is proposed, moreover, for shrinkage effect evaluation on shear strength at diagonal cracking, which is modification of the tension reinforcement ratio through tension reinforcement strain effect consideration due to early age concrete deformation. The linear relationship between effective depth to -2/5 power independent of early age concrete deformation magnitude and shear strength at diagonal cracking is successfully shown, and a shear strength at diagonal cracking design equation applicable to compressive strength of concrete from nearly 90-130N/mm2 is proposed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0870312502
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Sato, R
  • Kawakane, H
  • Kawamoto, T
  • Ushio, R
  • Maruyama, I
• Publication Date: 2007-9

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: pp 261-278
• Monograph Title: Structural Implications of Shrinkage and Creep of Concrete

Subject/Index Terms

• TRT Terms: Compressive strength; Deformation; High strength concrete; Material reinforcement; Ratios; Shear strength; Size; Tension
• Uncontrolled Terms: Autogenous shrinkage; Diagonal cracking; Effective depth; Failure modes; Reinforced concrete beams
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01082653
• Record Type: Publication
• ISBN: 0-87031-250-2
• Files: TRIS
• Created Date: Dec 18 2007 11:30AM