Finite element analysis of deep wide-flanged pre-stressed girders to understand and control end cracking.

Details

• Alternative Title:
  Finite element analysis of deep wide-flanged pre-stressed girders : draft final report
• Creators:
  Oliva, Michael G. ; Okumus, Pinar
• Corporate Creators:
  University of Wisconsin--Madison. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Wisconsin. Dept. of Transportation. Research Coordination Section
• Subject/TRT Terms:
  • Girders
  • Concrete bridges
  • Prestressed concrete bridges
  • Prestressed concrete
  • Cracking
  • Testing Girders--Testing
  • Concrete bridges--Cracking
• Publication/ Report Number:
  WHRP 11-06
• Resource Type:
  Tech Report
• Geographical Coverage:
  Wisconsin
• Edition:
  Covered final report; 2009-2011.
• Corporate Publisher:
  Wisconsin Highway Research Program
• Abstract:
  Hundreds of prestressed concrete girders are used each year for building bridges in Wisconsin. ; The prestress transfer from the prestressing strands to concrete takes place at the girder ends. ; Characteristic cracks form in this end region during or immediately after detensioning. Potential solutions to ; control end cracking were examined via finite element models and the impact of each solution on cracking ; was evaluated. Modifications to reinforcement bar size, debonding ratios, strand cutting sequence and use ; of draped strand patterns were simulated by the models. The results from different analyses were compared ; to quantify the success of each method in reducing strains causing girder end cracks. The tension strains ; leading to cracks of all types were responsive to debonding some of the bottom flange prestressing strands. ; Bottom flange cracking can be prevented by methodically debonding exterior strands, keeping the draped ; strands bonded, and evenly distributing the remaining bonded strands over the bottom flange.
• Format:
  PDF
• Funding:
  WisDOT SPR# 0092-10-12
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23563/dot_23563_DS1.pdf
• File Type:
  [PDF - 9.45 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:6bc05697a08d58557bf4f2235cf17656b86a83740cf8c46777400a9853a17a1079434221354137decd6de51d884f9bda090d6b076bb80160ea2a66bfe400b1df