00621483

Component

http://onlinepubs.trb.org...trr/1991/1319/1319-001.pdf

https://scholar.google.co...erka&publication_year=1991

Research has developed railings to withstand impact loads from vehicles of ever-increasing size; however, aesthetic considerations have been overshadowed by safety and structural requirements. The objective of this research study was to develop aesthetically pleasing, structurally sound railings that can serve as alternative railings in city or urban areas. A new steel pipe bridge rail--Texas Type T421--is introduced. This bridge rail is constructed of 5-in.-diameter steel pipe posts with a 5-in.-diameter steel pipe top rail 32 in. high and a 10-in.-diameter steel pipe lower rail. The bridge rail was crash-tested and evaluated in accordance with NCHRP Report 230. Two crash tests were required--a 4,500-lb passenger car at 60 mph and 25-deg impact angle and an 1,800-lb passenger car at 60 mph and 20-deg impact angle. In both tests the bridge rail contained and redirected the test vehicle. There were no detached elements or debris to present undue hazard to other traffic. The vehicle remained upright and relatively stable during the collision. The occupant-compartment impact velocities and 10-msec occupant ridedown accelerations were within the normally accepted limits. The vehicle trajectory at loss of contact (exit angles of 5 and 7.6 deg) indicated no intrusion into adjacent traffic lanes.

This paper appears in Transportation Research Record No. 1319, Bridge and Hydrology Research 1991. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01407135

p. 1-11

1991

Transportation Research Record

0309051576

Figures (7) ; Photos (33) ; References (1) ; Tables (2)

Aesthetics; Bridge railings; Crash tests; Crashes; Design; Impact; Motor vehicles; Performance evaluations; Speed; Steel pipe; Test vehicles; Testing; Traffic speed; Urban areas

Impact angle; Redirection

Bridges and other structures; Design; Highways; Research; I24: Design of Bridges and Retaining Walls

TRIS, TRB, ATRI

Apr 30 1992 12:00AM

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