Data collection and evaluation of continuity detail for John James Audubon Bridge No. 61390613004101.

Details

• Creators:
  Okeil, Ayman M.
• Corporate Creators:
  Louisiana State University. Department of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Continuous girder bridges
  • Prestressed concrete
  • Field studies
  • Data collection
  • Monitoring
  • Creep
  • Live loads
  • Structural analysis
  • Structural health monitoring
• Publication/ Report Number:
  FHWA/LA.14/526
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana. Dept. of Transportation and Development
• Abstract:
  This report summarizes findings from monitoring data that was collected over a two-year period from Bridge No. ; 61390613004101 in the John James Audubon Project, which was formerly designated as Bridge #2 prior to ; construction completion. The bridge was instrumented as part of an earlier project (LTRC Project No. 08-1ST). ; Results from the first monitoring project warranted resuming data collection to monitor the performance of Bridge ; No. 61390613004101 over a longer period of time. The focus of the monitoring effort for both projects is on the ; employed continuity detail, which is based on the recommendation of the National Cooperative Highway Research ; Program (NCHRP) Final Report 519. Continuity details are typically used to eliminate the needs for high-maintenance joints that often lead to the acceleration of element deterioration near the joints. The employed ; positive moment continuity detail transfers forces between adjacent girders via positive moment reinforcement that ; extends out of the bottom flanges of the prestressed concrete (PSC) girders into a continuity diaphragm. ; The 96-channel monitoring system that was installed as part of Project 08-1ST was reactivated in February 2012. ; Data from the embedded and surface-mounted sensors that measure strains, temperatures, rotations, and gap ; openings in critical locations in the monitored segment were collected for a period of two years. The collected data ; from both projects (12-1ST and 08-1ST) was analyzed and interpreted. Furthermore, four field visits were ; conducted to document the condition of the girder ends in the monitored segment. ; Recommendations based on the project findings are drawn. Data shows that 5 years after the construction of the ; bridge, some long-term effects such as creep and shrinkage have diminished. It is also evident that temperature ; effects are still a major factor that continues to strain the bridge in such a way that should not be ignored in the ; design of bridges with similar continuity details. The high-localized strains at girder ends due to thermal variation ; caused cracking in a few girder ends.
  More +
• Format:
  PDF
• Funding:
  12-1ST;30000546
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28349/dot_28349_DS1.pdf
• File Type:
  [PDF - 3.19 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:f240d69822e9ce42a122d4144a02642d1a287d9feca2d1e1e1704ac486c0a4482dd16a88df87c1e85f4065588ab30a21707151ec40540c191553f32fa557d1a9