Extending the Simple for Dead Load and Continuous for Live Load (SDCL) Steel Bridge System to Short Span Box Sections with Shallow Depth and Thin Bottom Flanges for ABC Application

The project develops a new box configuration formed by bending a flat steel plate into a U-shape and welding tension flanges to complete the section. This fabrication approach reduces depth, simplifies detailing, and allows integration with reinforced concrete decks while preserving SDCL behavior. To enhance local buckling resistance of the thin bottom flange near supports, a thin concrete layer will be added externally. Additionally, Ultra-High-Performance Concrete (UHPC) diaphragms will be explored to improve force transfer, simplify connection details, and increase durability in pier regions. The research includes (1) development of detailed nonlinear finite element models to evaluate structural behavior and conduct parametric studies; (2) laboratory testing of prototype shallow SDCL box sections to validate the analytical findings; (3) development of practical design recommendations, tables, and provisions tailored for spans up to 80 ft; and (4) preparation of sample design plans to facilitate immediate adoption by state DOTs and consulting engineers.

• Record URL:
  • https://abc-utc.fiu.edu/extending-the-simple-for-dead-load-and-continuous-for-live-load-sdcl-steel-bridge-system-to-short-span-box-sections-with-shallow-depth-and-thin-bottom-flanges-for-abc-application/

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

  Civil and Environmental Engineering
  10555 W. Flagler Street, EC 3680
  Miami, FL  United States  33174
• Principal Investigators:

  Azizinamini, Atorod

• Start Date: 20260101
• Expected Completion Date: 20270630
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Bridge design; Finite element method; Load tests
• Subject Areas: Bridges and other structures; Design; Highways;

Filing Info

• Accession Number: 01998453
• 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: Aug 7 2026 8:32AM