01333085

Component

https://doi.org/10.3141/2262-11

http://scholar.google.com...augh&publication_year=2011

A new, low-cost bridge railing was designed to be compatible with the Midwest Guardrail System (MGS). The barrier system was configured to reduce bridge deck width and its associated cost. Several concepts for an energy-absorbing bridge post were developed and tested; the concepts included strong-post designs with plastic hinges and weak-post designs with bending near the bridge deck attachment. The final railing concept incorporated S3 × 5.7 (S76 × 8.5) steel posts housed in a tubular bracket placed at the outside vertical edge of the deck and anchored to its top and bottom with one through-deck bolt. The W-beam rail section was attached to the posts with a bolt that was designed to fracture during an impact event. Two full-scale crash tests were performed in accordance with the Test Level 3 impact conditions provided in the "Manual for Assessing Safety Hardware." The bridge rail system met all safety performance criteria for both the small car and pickup truck crash tests. Barrier VII computer simulations, in combination with the full-scale crash testing programs for the bridge railing and MGS, demonstrated that a special-approach guardrail transition was unnecessary.

01363271

11-2687

English

pp 107-118

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309223003

Print

Figures; Photos; References (21) ; Tables (4)

Anchor bolts; Bridge decks; Bridge railings; Cost effectiveness; Crash tests; Energy absorption

AASHTO Manual for Assessing Safety Hardware; Midwest Guardrail System

W-beam guardrail

Bridges and other structures; Design; Highways; Safety and Human Factors; I24: Design of Bridges and Retaining Walls; I85: Safety Devices used in Transport Infrastructure

PRP, TRIS, TRB

Feb 17 2011 6:15PM

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• Context-Sensitive Solutions Versus Practical Solutions: What Are the Differences?
• Design and Testing of Two Bridge Railings for Transverse Nail-Laminated Timber Deck Bridges
• Effect of Barrier Type on Injury Severity in Motorcycle-to-Barrier Collisions in North Carolina, Texas, and New Jersey
• Estimating Joint Flow Probabilities at Stream Confluences Using Copulas
• Evaluation of Passing Process on Two-Lane Rural Highways in Spain with New Methodology Based on Video Data
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• Hydrographs and Estimates of Scour Depth Excess for Pier Scour Prediction: Use for Ungauged Streams with Scour Rate in Cohesive Soils Method
• Hydrologic Uncertainty in Prediction of Bridge Scour
• Methodology for Checking Shortcomings in Three-Dimensional Alignment
• New Insights on Evaluations of Design Consistency for Two-Lane Highways
• New Three-Dimensional Highway Design Methodology for Sight Distance Measurement
• Nonblocked Midwest Guardrail System for Wire-Faced Walls of Mechanically Stabilized Earth
• Old Road, New Directions: Plan for Adeline Street in Berkeley, California
• Provision of Sight Distance Around Concrete Barriers and Structures on Freeways and Interchanges
• Public Perception and Sustainable Management Strategies for Roadside Vegetation
• Reduced-Conflict Intersection
• Removal, by Vegetated Biofilter, of Medium and Low Concentrations of Pollutants from Simulated Highway Runoff
• Short-Radius Guardrail System for NCHRP Report 350 Test Level 2 Conditions
• Strategies to Address Utility Challenges in Project Development