Research for AASHTO Standing Committee on Highways. Task 216. Application of LRFD Bridge Design Specifications to High-Strength Structural Concrete: Final Project-Phase I

Section 4, Concrete Structures, of the AASHTO LRFD Bridge Design Specifications, Third Edition permits the use of design concrete strengths above 10.0 ksi when allowed by specific articles. This provision was introduced to allow the results of ongoing research projects to be introduced into the specifications when the research is completed. The eventual goal is to extend all articles of Section 5 to a design concrete strength of 15.0 ksi or higher. To date, revisions based on the FHWA project entitled "Compilation and Evaluation of Results from High Performance Concrete Bridge Projects" and NCHRP Project 18-07 on prestress losses have been approved by AASHTO. Ongoing NCHRP projects that will result in additional proposed revisions are 12-56 on shear, 12-60 on bond and development length, and 12-64 on flexure and compression. When these projects are complete and the results incorporated into the specifications, the major articles in Section 5 will be applicable to concrete compressive strengths of 15 ksi or higher. The next step is to identify the additional research needed so that the whole of Section 5 can be made applicable to design concrete strengths up to 15 ksi or higher. After that, a research program can be formulated to address the necessary topics including those not addressed in the ongoing NCHRP projects.

• Record URL:
  https://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=1231

Language

• English

Project

• Status: Completed
• Funding: $33560
• Contract Numbers:

  Project 20-07, Task 216

• Sponsor Organizations:

  American Association of State Highway and Transportation Officials (AASHTO)

  444 North Capitol Street, NW
  Washington, DC  United States  20001

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001

  National Cooperative Highway Research Program

  Transportation Research Board
  500 Fifth Street, NW
  Washington, DC  United States  20001
• Project Managers:

  Beal, David

• Performing Organizations:

  Henry G. Russell, Incorporated

  ,    
• Start Date: 20060224
• Expected Completion Date: 0
• Actual Completion Date: 20070831
• Source Data: RiP Project 11678

Subject/Index Terms

• TRT Terms: Bridge design; Concrete; High strength concrete; Specifications; Structural materials
• Identifier Terms: National Cooperative Highway Research Program
• Subject Areas: Bridges and other structures; I30: Materials;

Filing Info

• Accession Number: 01458454
• Record Type: Research project
• Source Agency: National Cooperative Highway Research Program
• Contract Numbers: Project 20-07, Task 216
• Files: RIP, USDOT
• Created Date: Jan 3 2013 12:43PM