Numerical Analysis of the Effect of Shrinkage on Flexural Deformation and Crack Width

A numeric and experimental investigation of shrinkage effect on structural concrete members' crack width and short-term and long-term flexural deformation is presented. Solving simultaneous differential equations relating to bond stress-slip relationship-based bond slip was how numerical analysis was performed. There was formulation of equations for an element between two adjacent cracks, taking into consideration fictitious crack model-based tension softening, time dependence of bond, creep, and shrinkage. Present method verification was performed through load tests carried out through 200 mm wide x 205 mm high section structural concrete members made of expansive high strength concrete and conventional high shrinkage concrete, with measurement of curvature and crack width in a constant bending moment zone with 800 mm length. Creep and shrinkage tests were performed in addition to this. The present study resulted in the following conclusions: (1) cracked concrete section tension contributed dominantly to stress reduction in a tension reinforcing bar resulting in flexural stiffness enhancement and in flexural crack width reduction, when tension reinforcing bar stress is below 150 N/mm2 and reinforcing bar ratio is under 1.5%; (2) after sustained loading application, due mainly to tension stiffening loss at cracked section, caused by shrinkage, with time flexural crack widths increase; (3) the present methods explain the above conclusions.

• 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:
  • Ujike, I
  • Sato, R
  • Maruyama, I
  • Tanimura, M
  • Suzuki, M
• Publication Date: 2007-9

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: pp 201-216
• Monograph Title: Structural Implications of Shrinkage and Creep of Concrete

Subject/Index Terms

• TRT Terms: Bond strength (Materials); Concrete; Creep; Curvature; Deformation; Differential equations; Expansive concrete; Flexural strength; High strength concrete; Load tests; Numerical analysis; Reinforcing bars; Shrinkage; Tension
• Uncontrolled Terms: Bond slip; Crack width; Stress reduction factor; Structural concrete; Verification
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01082598
• Record Type: Publication
• ISBN: 0-87031-250-2
• Files: TRIS
• Created Date: Dec 18 2007 11:30AM