Performance of Skewed Reinforcing in Inverted-T Bridge Caps

Reinforced concrete inverted-T bridge caps are used extensively in Texas bridges. Many of these bridge structures must be skewed, some in excess of 45 degrees. Faster and easier construction could be obtained if skewed transverse reinforcing steel is utilized. Accordingly, there is a concern about whether using skewed transverse reinforcement will provide reasonable structural behavior for the skewed inverted-T bridge cap in terms of overall cracking occurrence and structural performance. The guidance in current American Association of State Highway and Transportation Officials (AASHTO) code and research of skewed inverted-T bridge caps are limited to only the design of typical normal skewed transverse reinforcement. Therefore, it is necessary to analyze the structural performance of the skewed inverted-T bridge caps with skewed transverse reinforcement and compare the performance to typical normal transverse reinforcement. This research project shall conduct the experimental and analytical investigation on the behavior of the skewed inverted-T bridge caps utilizing skewed transverse reinforcement emphasizing the following three aspects: (a) skewed angle, (b) detailing of transverse reinforcement, and (c) amount of transverse reinforcement. Design provisions of existing design codes, especially AASHTO load and resistance factor design (LRFD) code, shall be reevaluated through the experimental approach. Finally, a rational design method shall be established for the skewed inverted-T bridge caps with skewed transverse reinforcement.

• Record URL:
  https://library.ctr.utexas.edu/Presto/project=0-6905
• Supplemental Notes:
  • Project 0-6905 was postponed 10/31/2020 and restarted 9/1/2021 under Project Number 0-6905-01.

Language

• English

Project

• Status: Completed
• Funding: $269760
• Contract Numbers:

  0-6905

  0-6905-01

• Sponsor Organizations:

  Texas Department of Transportation

  125 E. 11th Street
  Austin, TX  United States  78701-2483

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Managing Organizations:

  Texas Department of Transportation

  125 E. 11th Street
  Austin, TX  United States  78701-2483
• Project Managers:

  Adediwura, Jade

• Performing Organizations:

  University of Houston, Texas

  Houston, TX  United States 
• Principal Investigators:

  Mo, Yi-Lung

• Start Date: 20160101
• Expected Completion Date: 20230831
• Actual Completion Date: 20230831

Subject/Index Terms

• TRT Terms: Bents; Bridge design; Bridges; Load and resistance factor design; Material reinforcement; Reinforced concrete; Reinforcing steel; Skew bridges; Transverse reinforcement
• Identifier Terms: American Association of State Highway and Transportation Officials
• Subject Areas: Bridges and other structures; Construction; Highways;

Filing Info

• Accession Number: 01618972
• Record Type: Research project
• Source Agency: Texas Department of Transportation
• Contract Numbers: 0-6905, 0-6905-01
• Files: RIP, STATEDOT
• Created Date: Dec 20 2016 3:34PM