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原文传递 Analysis of Roadside Safety Devices for Use on Very High-Speed Roadways.

题名：	Analysis of Roadside Safety Devices for Use on Very High-Speed Roadways.
作者：	N. M. Sheikh; R. Ferdous; R. P. Bligh; A. Y. Abu-Odeh;
关键词：	highspeed highways,roadside safety hardware,texas department of transportation (txdot);finite element simulations, roadside safety devices, impact performance, high-speed impacts;
摘要：	The Texas Department of Transportation (TxDOT) is embarking on a multi-decade effort to expand the states transportation system. TxDOT has expressed an interest in using very high design speeds (above 80 mph) for some of these facilities to promote faster and more efficient travel within the state. Currently, roadside safety hardware is tested at a speed of 62 mph. This impact speed was derived from crash data collected on roads with design speeds up to 70 mph. The ability of existing roadside safety features to accommodate more severe, higher energy impacts is not known. The objective of this research is to develop roadside safety hardware suitable for use on very highspeed highways. Finite element simulations are used to evaluate the impact performance of selected roadside safety devices subjected to very high-speed impacts. Systems analyzed include single slope concrete barrier, modified thrie-beam guardrail, box beam guardrail, and slip-base sign supports. Design modifications to some of these systems are recommended for further consideration. / NOTE: Technical rept. / Supplementary Notes: Sponsored by Texas Dept. of Transportation, Austin. Research and Technology Implementation Office. and Federal Highway Administration, Austin, TX. Texas Div. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
报告类型：	科技报告