Transition Design for Temporary Concrete Barrier (405160-26)

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Final Report:  Development and Testing of a Transition from Free-Standing to Pinned Temporary Concrete Barrier

TTI Research Supervisor:
Nauman Sheikh, P.E.
Texas Transportation Institute
Texas A&M University System
TAMU 3135
College Station, Texas 77843-3135
(979) 845-8955
[email protected]
Pooled Fund Technical Representative:
Paul Fossier
Assistant Bridge Design Administrator Bridge and Structural Design Section
Louisiana Transportation Center
1201 Capitol Access Road
P.O. Box 94245
Baton Rouge, LA 79084-9245
(225) 379-1323
[email protected]

ABSTRACT:

In 2008, Texas A&M Transportation Institute develop a pinned down F-shape temporary concrete barrier system that provides limited lateral deflection (less than 6 inches) and can be used for bridge or roadway applications. The design was developed for use on concrete pavements or bridge decks as thin as seven inches. The objective of this research was to develop a transition design that can be used to transition from a free-standing F-shape temporary concrete barrier system to the pinned down F-shape barrier placed on concrete pavement or bridge deck.

The transition was developed in accordance with American Association of State Highway and Transportation Officials’ (AASHTO) Manual for Assessing Safety Hardware (MASH) test level 3 criteria, using the existing F-shape pinned concrete barrier design to the extent possible. The researchers developed a transition design concept and used full-scale finite element vehicular impact analysis to determine the critical impact point (CIP) of the transition design. The design was subsequently crash tested in accordance with MASH test 3-21 criteria (5000-lb vehicle, 62 mi/h, 25 degrees) at the critical impact point.

Transition after MASH Test 3-21

Results of the crash test were evaluated to determine that the transition from the free-standing to anchored F-shape barrier placed on concrete performed acceptably for MASH Test Level 3.


ELIGIBILITY LETTER:

Not applied.

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2017-01-20