Crack Width Prediction for Exterior Portion of Inverted "T" Bent Caps

Unacceptable diagonal cracks frequently occur at the re-entrant corners between the cantilever ledges and the web of inverted "T" bent caps at service load. In order to control the diagonal cracks, an extensive investigation was carried out. The first phase of this research was to predict the diagonal crack widths at the interior portions of the bent caps. A 2-D analytical model, called Compatibility-Aided Strut-and-Tie Model (CASTM), was developed and calibrated by the test results of seven full-size 2-D specimens. The first phase of research was reported in Texas Department of Transportation Research Report 0-1854-3. This report (0-1854-4) describes the second phase of research to predict the diagonal crack widths at the end faces of the exterior portions of bent caps. In this second-phase research, the CASTM was extended to 3-D analysis. Ten 3-D specimens were then tested and the resulting data were used to calibrate the model. Crack control methods for the exterior end faces were recommended.

  • Corporate Authors:

    University of Houston

    Department of Civil and Environmental Engineering, 4800 Calhoun Road
    Houston, TX  United States  77204-4003

    Texas Department of Transportation

    Research and Technology Implementation Office, P.O. Box 5080
    Austin, TX  United States  78763-5080
  • Authors:
    • Zhu, Ronnie Rong-Hua
    • Hsu, Thomas T C
  • Publication Date: 2003-4-1

Language

  • English

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 95p

Subject/Index Terms

Filing Info

  • Accession Number: 01000937
  • Record Type: Publication
  • Report/Paper Numbers: Research Report 0-1854-4
  • Contract Numbers: Project 0-1854
  • Files: TRIS, STATEDOT
  • Created Date: Jun 15 2005 10:06AM