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Development of Low-Deflection Precast Concrete Barrier.
| 题名： | Development of Low-Deflection Precast Concrete Barrier. |
| 作者： | BLIGH, R. P.; HAUG, R. R.; MENGES, W. L.; SHEIKH, N. M. |
| 关键词： | *Concrete-barriers; *Precast-concrete.;Concrete-structures; Collision-tests; Crash-tests; Texas-; Portable-concrete-barriers; Traffic-barrier-systems; Deflection-; Highway-safety. |
| 摘要： | 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. |
| 报告类型： | 科技报告 |
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