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原文传递 Portable Concrete Traffic Barrier for Maintenance Operations. Technical rept. (Sept. 2003 - Aug. 2004).

题名：	Portable Concrete Traffic Barrier for Maintenance Operations. Technical rept. (Sept. 2003 - Aug. 2004).
作者：	BLIGH, R. P.; HAUG, R. R.; MENGES, W. L.; SHEIKH, N. M.
关键词：	Median-barriers; Concrete-structures; *Impact-tests.;Roadside-safety; Barrier-collision-tests; Design-criteria.
摘要：	The objective of this project is to develop and test a portable barrier system for high-speed applications that can be easily transported and erected by Texas Department of Transportation (TxDOT) maintenance forces using readily available equipment such as a front-end loader. Consideration was given to factors such as segment length, segment weight, connection method, barrier constructability, and dynamic barrier deflection. A deflection constraint of 3 ft was imposed by the project panel. Based on the results of the testing and evaluation reported herein, the new precast, cross-bolt, F-shape concrete traffic barrier with 10-ft barrier segments is considered suitable for implementation on high-speed roadways. The cross-bolt connection system adapted for use in the new barrier helps limit dynamic deflection during an impact. When subjected to a crash test with an impact severity 15 percent greater than currently required in NCHRP Report 350, the barrier deflected only 27 inches. This is the lowest deflection of any free-standing, portable concrete barrier approved to NCHRP Report 350 requirements other than TxDOTs X-bolt barrier with 30-ft segments. The low deflection and ease of placement and repair make the barrier well suited for maintenance and work zone operations.
报告类型：	科技报告