Mechanical and Materials Engineering, Department of
Department of Engineering Mechanics: Dissertations, Theses, and Student Research
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First Advisor
John D. Reid
Date of this Version
8-2018
Document Type
Thesis
Citation
Ginger, C.G., Development of Iowa DOT Combination Bridge Separation Barrier with Bicycle Railing, thesis to University of Nebraska-Lincoln Graduate Studies, July 23, 2018.
Abstract
The Iowa Department of Transportation typically builds separation barriers between vehicle and pedestrian/bicycle facilities when sidewalks or trails are present on vehicular bridges. Currently, Iowa DOT employs a combination bridge rail that utilizes a concrete parapet that previously had been successfully evaluated to National Cooperative Highway Research Program (NCHRP) Report 350 Test Level 4 (TL-4) criteria for these situations. While the parapet had been successfully evaluated, the combination bridge rail system as a whole had not been evaluated to any crash test standards. Iowa DOT desired that researchers at Midwest Roadside Safety Facility (MwRSF) design and test a combination bridge separation barrier to current Manual for Assessing Safety Hardware (MASH) TL-2 standards to use in place of their current, untested system.
During this effort, previous combination rails, low-height vertical parapets, and zone of intrusion (ZOI) studies were reviewed to provide guidance on system design. A simulation effort was also performed to aid in height selection of the parapet, as well as placement of the attached bicycle rail to reduce the amount of negative vehicle-to-rail interaction with the system. Using the information gathered during the review of previous systems and simulation effort, a full system design was produced. It was then recommended that the proposed system be evaluated to MASH test designation 2-11 in order to assess the system’s performance during a vehicle impact scenario.
Advisor: John D. Reid
Included in
Automotive Engineering Commons, Computer-Aided Engineering and Design Commons, Structural Engineering Commons, Transportation Engineering Commons
Comments
A thesis Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science, Major: Mechanical Engineering and Applied Mechanics, Under the Supervision of Professor John D. Reid. Lincoln, Nebraska : August, 2018.
Copyright (c) 2018 Chaz M. Ginger