Managing Florida's fracture critical bridges - phases 1 and 2 : final report.

Details

• Creators:
  Pham, Huy ; Gull, Jawad H. ; Mohammadi, Alireza ; Azizinamini, Atorod
• Corporate Creators:
  Florida International University. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Florida. Department of Transportation
• Subject/TRT Terms:
  • Before and after studies
  • Box girder bridges
  • Cracking
  • Evaluation and assessment
  • Field tests
  • Finite element method
  • Fracture mechanics
  • Steel bridges
  • Fracture critical
  • steel twin box-girder
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• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Florida
• Edition:
  Final report
• Corporate Publisher:
  Florida. Department of Transportation. Research Center
• Abstract:
  Based on the definition given in the AASHTO LRFD Bridge Design Specifications, twin steel box-girder bridges are ; classified as bridges with fracture critical members (FCMs), in which a failure of a tension member is expected to ; lead to a collapse of the bridge. However, a number of such bridges with either a partial or full-depth crack in one ; girder have been reported and are still providing service without collapsing. The main objective of this research ; project is to understand the behavior of twin steel box-girder bridges and to develop methods for evaluating their ; redundancy level in the event of the fracture of one tension member. ; The research project included an experimental investigation on a small-scale steel twin box-girder bridge, field ; testing of a full-scale twin box-girder, analysis of existing research and design data, and an extensive amount of ; numerical analyses carried out on calibrated 3-D nonlinear finite element models. The results from this study provide ; in-depth understanding of twin steel box-girder bridge behavior before and after a fracture in the tension member ; occurs. In addition to the experimentally verified finite element method, the report also proposes a simplified method ; for evaluating the performance of twin steel box-girder bridges and provides a list of important factors that could ; control the reserve capacity of the damaged bridge. ; A result of this project is the development of a comprehensive roadmap for assessing the redundancy of twin steel ; box-girder bridges in which the elements of the roadmap are identified, and solutions for several of the steps are ; provided. The development of solutions for remaining steps of the roadmap is proposed for a future research.
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• Format:
  PDF
• Funding:
  BDV29-977-17
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31000/dot_31000_DS1.pdf
• File Type:
  [PDF - 7.46 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ec34141fbdc7fff890edfea21f5582a01aebeb428737bc46eeabe34c77ae0349