Assessment and Repair of Prestressed Bridge Girders Subjected to Over-Height Truck Impacts

Details

• Creators:
  AbdelMalek, Haitham ; Ashun, Francis ; Elshazli, Mohamed ; Abdulazeez, Mohanad M ; Gheni, Ahmed ; Ibrahim, Ahmed ; ElGawady, Mohamed
• Corporate Creators:
  Missouri University of Science and Technology ; University of Idaho
• Corporate Contributors:
  Missouri. Department of Transportation. Construction and Materials Division ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Accidental Lateral Eccentricity Assessments Bridge Decks Carbon Fibers CFRP Collisions Equivalent Static Force Flexural Strength Force Girders Maintenance Prestressed Concrete Repairing Residual Prestress Forces Residual Stress Resilience (Materials) Shear Tests Static Loads Strand Splicing Strategic Planning Traffic Crashes

  More +
• Publication/ Report Number:
  cmr 25-013
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report (January 2021-April 2025
• Corporate Publisher:
  Missouri. Department of Transportation. Construction and Materials Division
• Abstract:
  This research investigates the impact of over-height vehicle collisions on prestressed concrete bridge girders and explores effective repair strategies to restore their structural integrity. The study addresses a critical concern in bridge resilience, as vehicle impacts can cause varying degrees of damage and severe prestressing strands which compromise girder flexural strength and overall safety. A comprehensive approach was employed, integrating numerical modeling and experimental testing to assess damage mechanisms and evaluate the effectiveness of different repair techniques. Key findings include the determination of equivalent static force for semi-tractor trailers and rigid objects. Shear failure was identified as the dominant failure mode of prestressed concrete girders under impact loading. Additionally, accidental lateral eccentricity was found to reduce flexural resistance, necessitating a 15% reduction factor in AASHTO LRFD guidelines. A practical technique for measuring residual prestress forces was developed and validated with an experimental test and found to be conservative by 9.4%. Repair methods using mechanical strand splicing successfully restored up to 95% of the original strength for strand losses ranging from17% to 33% using innovative confinement techniques. Moreover, externally bonded carbon fiber-reinforced polymer (CFRP)repairs fully restored flexural strength for up to 33% strand loss, with an additional strength reserve of 15%–23%.
• Format:
  PDF
• Funding:
  TR202011/TPF-5(462)
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0bc635d34532dcd856f5306916c0e6bc6f11c5533d53405174b19bc46f1468afbd8f8d4aca06c331c3eb20b1a48a7753d06b0ae8efafdaf774bfe0eb78b3d1f5
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/86972/dot_86972_DS1.pdf
• File Type:
  [PDF - 28.41 MB ]