The high lateral dynamic deflection of some current Texas Department of Transportation (TxDOT) portable concrete barriers renders them inappropriate for deployment in areas with restricted work space. Under this project, a new precast concrete traffic barrier system with limited deflection was developed through a program of simulation and full-scale crash testing. Based on the results of the testing and evaluation reported herein, the new cross-bolt, F-shape, precast concrete traffic barrier is considered suitable for implementation on high-speed roadways. The low barrier deflection (19 inches (483 mm)) and ease of placement and repair make the cross-bolt F-shape barrier well suited for use as a work zone barrier. The weight of the 30-ft (9.1 m) F-shape barrier segments was determined to be approximately 13,680 lb (6205 kg). Because this is less than the weight of the current New Jersey-shaped barriers used by TxDOT, implementation of the new barrier will not require any changes to current barrier transportation, handling, and placement procedures.
Development of Low-Deflection Precast Concrete Barrier
2005
68 pages
Report
Keine Angabe
Englisch
Highway Engineering , Construction Equipment, Materials, & Supplies , Concrete barriers , Precast concrete , Concrete structures , Collision tests , Crash tests , Texas , Portable concrete barriers , Traffic barrier systems , Deflection , Highway safety , Low barrier deflection , F-shape , New Jersey shape , Median barriers
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