UHPC Connection For SDCL Steel Bridge System

This research investigates the development of optimized ultra-high-performance concrete (UHPC) connections for simple for dead load and continuous for live load (SDCL) steel bridge systems. SDCL bridge systems eliminate field splices, reduce inspection costs, and improve service life by protecting steel girder ends with a cast-in-place concrete diaphragm. While previous designs utilize normal-strength concrete (NSC), this study explores the advantages of UHPC, including superior compressive and tensile strength, durability, and minimal steel reinforcement and detailing requirements. The research consists of experimental validation through cyclic and ultimate load testing, finite element modeling, and comparative analysis with NSC-based designs. The proposed UHPC connection simplifies girder-end detailing, reduces diaphragm size significantly, and minimizes on-site construction time and disruptions, which aligns with the principles of accelerated bridge construction (ABC). The outcomes of this study will contribute to devise refined design guidelines, promoting practical implementation of UHPC in SDCL steel bridge applications for improved structural efficiency and long-term performance with minimal maintenance and inspection.

• Record URL:
  • https://abc-utc.fiu.edu/uhpc-connection-for-sdcl-steel-bridge-system/

Language

• English

Project

• Status: Active
• Funding: $70,000.00
• Contract Numbers:

  69A3552348322

• Sponsor Organizations:

  Innovative Bridge Technologies/Accelerated Bridge Construction University Transportation Center (IBT/ABC-UTC)

  Florida International University
  Miami, FL  United States 

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Performing Organizations:

  Florida International University

  10555 West Flagler Street
  Miami, FL  United States  33174
• Principal Investigators:

  Pozo-Lora, Fray

  Azizinamini, Atorod

• Start Date: 20250115
• Expected Completion Date: 0
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Bridge design; Finite element method; Load tests; Steel bridges; Structural connection; Ultra high performance concrete
• Subject Areas: Bridges and other structures; Design; Highways; Materials;

Filing Info

• Accession Number: 01954237
• Record Type: Research project
• Source Agency: Innovative Bridge Technologies/Accelerated Bridge Construction University Transportation Center (IBT/ABC-UTC)
• Contract Numbers: 69A3552348322
• Files: UTC, RIP
• Created Date: May 4 2025 3:20PM