Repair of Steel Beam/Girder Ends with Ultra High-Strength Concrete – Phase II: Part 1: UHPC Push-out Experiments

Details

• Creators:
  Kruszewski, Dominic ; Zaghi, Arash Esmaili ; Wille, Kay
• Corporate Creators:
  University of Connecticut. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Connecticut. Department of Transportation. Division of Research ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Beams Corrosion Girders High Strength Concrete Repairing Steel Ultra High Performance Concrete
• Publication/ Report Number:
  CT-2295-1-17-4
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report 2015-2018
• Corporate Publisher:
  Connecticut. Department of Transportation
• Abstract:
  A novel repair method has been developed at the University of Connecticut for corroded steel bridge girder ends. The repair method consists of encasing the corroded steel area with UHPC. The UHPC panel is bonded to the steel girder using headed shear studs welded to the uncorroded portions of the thin web. The repair provides a secondary load path to restore the bearing and shear strength of the girder which were reduced due to corroded section loss. The interaction between the headed shear studs, web plate and UHPC cast is the focal point of the proposed UHPC repair method. Welding headed shear studs to the thin web plate of a bridge girder is not traditional practice. A comprehensive performance evaluation of the shear connectors is needed when they are welded on thin web plates and embedded in UHPC. This report presents the six-phase approach to generate a thorough understanding of this critical force-transfer mechanism so that the bridge repair may be successfully implemented. A series of 38 push-out experiments and several supplemental finite element simulations were conducted to understand various design considerations on a local level. The five phases include 1) developing a general understanding of the behavior of head shear studs embedded in UHPC through a parametric study, 2) evaluating design considerations such as effect of eccentric loading, surface preparation, and UHPC conditions, 3) performing finite element analysis to validate experimental results, 4) analyzing the durability of the repair, 5) evaluating the potential of using alternative shear connectors, and 6) developing design guidelines for shear connectors for the UHPC repair.
• Format:
  PDF
• Funding:
  SPR-2295
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:cc915241d5d27f239b4e9be0f1914cb50d62b451cdaaaf530a9908e305fe1c7462cadf857cf97d0bd6f9cec88d4375fa292346a47f235019f2f32d17b95ec9f3
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/78262/dot_78262_DS1.pdf
• File Type:
  [PDF - 18.06 MB ]