Concept Development of a Bullnose Guardrail System for Median Applications PDF Download
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Author:
Publisher:
ISBN:
Category : Impact
Languages : en
Pages : 106
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Book Description
Author:
Publisher:
ISBN:
Category : Impact
Languages : en
Pages : 106
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Book Description
Author: Bob W. Bielenberg
Publisher:
ISBN:
Category : Median strips
Languages : en
Pages : 256
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Book Description
Author: Bob W. Bielenberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Bob W. Bielenberg
Publisher:
ISBN:
Category : Median strips
Languages : en
Pages : 134
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Book Description
The research study consisted of Phase II of the development and full-scale vehicle crash testing of a bullnose barrier concept for the treatment of median hazards. The bullnose guardrail consisted of a 12-gauge thrie beam rail supported by twenty-two wood posts, eleven posts on each side of the system. Horizontal slots were cut in the valleys of selected thrie beam sections to aid in vehicle capture as well as to reduce the buckling and bending capacities of the rail. Two full-scale crash tests were performed, both using a 2000-kg pickup truck. The first crash test, impacting at a speed of 100.2 km/h and an angle of 0 degrees, was unsuccessful following the rupture of the thrie beam and subsequent uncontrolled penetration of the vehicle behind the barrier. Computer simulation of the failed test was performed using LS-DYNA. Analysis of the simulation and full-scale test results led to the addition of two steel cables placed behind the top and middle humps of the thrie beam nose section to aid in truck containment without stiffening the barrier. Computer simulation of the modified design demonstrated successful containment of the pickup truck. The second test, impacting at a speed of 103.5 km/h and an angle of 0 degrees was determined to be successful according to the safety standards set forth by the Test Level 3 (TL-3) evaluation criteria described in the NCHRP Report No. 350, "Recommended Procedures for the Safety Performance Evaluation of Highway Features" (1993). The next phase of the bullnose barrier system design will be to complete the remaining crash tests needed for compliance with the NCHRP Report No. 350 safety standards for median barriers.
Author: Cody S. Stolle
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 272
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Book Description
Author:
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 204
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Book Description
This research study consisted of the development and testing of a short-radius guardrail system for protection of hazards near intersecting roadways and capable of meeting the Test Level 3 (TL-3) impact conditions of the NCHRP Report No. 350 criteria. A short-radius system was designed and consisted of a curved and slotted thrie beam nose section with two adjacent slotted thrie beam sections supported by breakaway posts. One side of the system was attached to a TL-3 steel post transition while the other was attached to a TL-2 end terminal. A series of four full-scale crash tests were conducted on the short-radius guardrail system.
Author: Hayes E. Ross
Publisher: Transportation Research Board
ISBN: 0309067502
Category : Four-wheel drive vehicles
Languages : en
Pages : 103
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Book Description
Author:
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 980
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 338
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Book Description
Author:
Publisher: Amer Assn of State Hwy
ISBN: 9781560510314
Category : Bridge railings
Languages : en
Pages : 352
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Book Description
This document presents a synthesis of current information and operating practices related to roadside safety and is developed in metric units. The roadside is defined as that area beyond the traveled way (driving lanes) and the shoulder (if any) of the roadway itself. The focus of this guide is on safety treatments that minimize the likelihood of serious injuries when a driver runs off the road. This guide replaces the 1989 AASHTO "Roadside Design Guide."
