Continuity diaphragm for skewed continuous span precast prestressed concrete girder bridges.

Details

• Creators:
  Saber, Aziz ; Toups, Joseph ; Guice, Leslie ; Tayebi, Abdelkader
• Corporate Creators:
  Louisiana Tech University. Department of Civil Engineering
• Corporate Contributors:
  Louisiana Transportation Research Center ; Louisiana. Dept. of Transportation and Development
• Subject/TRT Terms:
  • Skew bridges
  • Skewed structures
  • Precast concrete
  • Prestressed concrete
  • Girders
  • Vertical supports
  • Long span bridges
  • Concrete bridges
  • Prestressed concrete bridges
  • Bridges
  More +
• Publication/ Report Number:
  FHWA/LA 04/383
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Edition:
  Final report; June 2001-June 2003.
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  Continuity diaphragms used on skewed bents in prestressed girder bridges cause difficulties in detailing and ; construction. Details for bridges with large diaphragm skew angles (>30°) have not been a problem for LA DOTD. ; However, as the skew angle decreases or when the girder spacing decreases, the connection and the construction become ; more difficult. Even the effectiveness of the diaphragms is questionable at these high skews. Thus, the need for ; continuity diaphragms for skewed continuous span precast prestressed concrete girder bridges is investigated. The ; bridge parameters considered in this study are based on results of a survey sent to other states’ bridge engineers and ; design of experiment techniques. The parameters include girder type, bridge skew angle, girder spacing, span length, ; and diaphragm skew angle. The effects of continuity diaphragms on stresses and deflections from truck and lane ; loading on continuous skewed bridges are evaluated and results provide a fundamental understanding of the load ; transfer mechanism in diaphragms of skewed bridges. The effectiveness of continuity diaphragms for skewed ; continuous bridges is limited. The outcome of the research will reduce the construction and maintenance costs of ; bridges in the state of Louisiana and the nation.
  More +
• Format:
  PDF
• Funding:
  State project number: 736-99-0914 ; LTRC Project number: 01-1ST
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/22155/dot_22155_DS1.pdf
• File Type:
  [PDF - 2.80 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:85783f987585e6fccfbd800f36474a717148769118a28dd9053d67c6c1f5bf46f875f02ce070a94de5e40b0307a678cf3ecd2e4586a7adf3105257565620cab1