Finite Element Analysis of Deep Wide-Flanged Pre-stressed Girders : Draft Final Report

Details

• Alternative Title:
  Computer Models Identify Methods to Reduce Bridge Cracks During Production Processes
• Creators:
  Oliva, Michael ; Okumus, Pinar
• Corporate Creators:
  University of Wisconsin--Madison. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Wisconsin. Dept. of Transportation. Research Coordination Section ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Prestressed concrete
  • Prestressed concrete bridges
  • Girders
  • Cracking
  • Cutting
  • Finite element method Prestressed girders
  • Bridge girders
  • Girder cracking
  • Prestress transfer
  • Strand cutting
  More +
• Publication/ Report Number:
  WHRP 11-06
• Resource Type:
  Tech Report
• Geographical Coverage:
  Wisconsin
• Edition:
  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/25026/dot_25026_DS1.pdf
• File Type:
  [PDF - 9.49 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:9e2afab894655bbe6ae89c6727a6b1eb597320382af1e26430330d7ca823ee73be351e6fca6c308a2c501ae726ba0e2c1898cfc889a0d840c3fe611c0c5948e6