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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations



Research and Development (R&D) Project Sites

Project Information
Project ID:   FHWA-PROJ-06-0024
Project Name:   Shear Behavior of Lightweight High-Performance Concrete Girders
Project Status:   Active
Start Date:  October 1, 2006
End Date:  December 31, 2014
Contact Information
Last Name:  Graybeal
First Name:  Benjamin A (Ben)
Telephone:  202-493-3122
E-mail:  benjamin.graybeal@dot.gov
Office:   Office of Infrastructure Research and Development
Team:   Bridge and Foundation Engineering Team [HRDI-40]
Program:   Innovative Bridge Research and Deployment
Laboratory:   Structures Laboratory
Project detail
Roadmap/Focus area(s):   Infrastructure Research and Technology Strategic Plan and Roadmap
Project Description:   Recently, more emphasis has been placed on the use of lightweight or specified density concrete as a solution for several bridge applications. The properties of these materials result in applications that have lighter transportation loads, require smaller construction equipment, result in extended span ranges and reduced inertia forces. The American Association of State Highway and Transportation Officials specifications for designing with these materials have not been significantly updated since the 1960s. This work, along with the work of National Cooperative Highway Research Program Project 18-15, intends to update the specifications appropriately for the modern version of these materials.
Goals:   This project will develop recommended specification revisions for shear design of lightweight high-performance concrete beams and girders in the American Association of State Highway and Transportation Officials (AASHTO) LRFD Bridge Design Specifications.
Test Methodology:   Full-scale physical testing of structural members in combination with all necessary computational analysis.
Other Information:   Full-scale physical testing began in early 2010 and was completed inĀ 2011. Thirty full-scale girder tests within this project.
Expected Benefits:   Research will facilitate a revision of the lightweight concrete provisions in the Load and Resistance Factor Design (LRFD) Bridge Design Specifications.
FHWA Topics:   Roads and Bridges--Design
TRT Terms:   Concrete Structures
FHWA Disciplines:   Design
Subject Areas:   Bridges and other structures


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