TTI Research Supervisor:
Nauman M. Sheikh, P.E.
Associate Research Engineer
Texas A&M Transportation Institute
College Station, Texas 77843-3135
(979) 845-8971 [email protected]
Pooled Fund Technical Representative:
Paul B. Fossier, Jr., P.E.
Assistant Bridge Design Administrator
Bridge and Structural Design Section
Louisiana Dept. of Transportation & Development
1201 Capitol Access Road
P.O. Box 94245
Baton Rouge, LA 79084-9245
(225) 379-1323 [email protected]
Under this project, a new restraining design that limits lateral deflections of F-shaped precast concrete barrier was developed through a program offinite element simulation analysis and full-scale vehicle crash testing. This design uses the pins to restrain the barriers in a manner that is easy to install, inspect, and remove. It also minimizes damage to bridge decks or concrete pavements and no through the deck bolting is required. The design uses steel pins which are simply dropped into inclined holes that pass through the toe of the barrier and continue a short depth into the bridge deck or concrete pavement underneath.
The new F-shaped pinned-down barrier successfully passed NCHRP Report 350 Test Level 3 requirements. The maximum permanent and dynamic barrier deflections measured in the crash test were 5.76 inches (483 mm) and 11.52 inches (293 mm), respectively.