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Load Rating Study of Effects of Special Hauling Vehicle Loads on Ohio Bridges

Islam, Shariful
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544818358028013

Abstract Details

2018, Master of Science, University of Toledo, Civil Engineering.
Short, single-unit trucks with heavy, closely spaced axle-loads, referred to as Specialized Hauling Vehicles (SHVs), have lower load ratings than AASHTO legal loads. SHVs may cause forces by more than fifty percent in certain cases. These higher-force effects are for bridges with shorter spans, or elements with shorter load lengths, such as transverse floor beams. Per the FHWA, the Ohio Department of Transportation was required to incorporate SHVs in their load-rating basis and post bridges. This would require ODOT to load rate thousands of bridges. An initial comparison of moments produced by SHVs showed an increase of approximately twenty-five percent over the Ohio legal trucks. Therefore, ODOT divided its bridge inventory into three groups: • Group A - Ohio Legal Rating Factor ≥ 1.35 • Group B - 1.00 ≤ Ohio Legal Rating Factor ≤ 1.35 • Group C - Ohio Legal Rating Factor ≤ 1.00 ODOT hypothesized that Ohio bridges with their longest span less than 200 feet and rating factor (RF) ≥ 1.35 for Ohio legal loads will have a RF ≥ 1.0 under SHV loads. Thus, bridges with a rating factor greater than 1.35 would not require load rating for SHVs. If this hypothesis is correct, the number of bridges requiring load rating would be reduced by an order of magnitude. This hypothesis was tested through load rating of an existing 187 bridges and parametric studies. The author rated twenty-five slab, twelve PS I-beam, thirteen PS box, and twenty-eight steel bridges. A parametric model for single span bridges was developed by the author. To test the hypothesis in a broad way, results from all 187 bridges were analyzed in this thesis. Ratings for all the bridges satisfy the hypothesis. However, two out of thirty-three prestressed box beam bridges, and one out of thirty steel simple span bridges had a ratio of Ohio legal load RF to SHV RF greater than 1.35. This means that a similar bridge with an Ohio legal load RF equal to 1.35 would have had an SHV RF less than 1.00. The results for this work supported the hypothesis. In the sample taken for load rating study, none of the bridges have a controlling SHV RF less than 1.0. The highest ratio of RF for the box bridges were 1.36 and 1.37 for 76-foot and 80-foot simple span bridges respectively. The highest ratio of RF for a simple span steel bridge was 1.36 for a 70-foot span bridge. All three bridges with a RF ratio greater than the 1.35 value were simple span and have a span from 70- to 80-feet. The consistency of the existing bridge load rating and parametric studies shows the general applicable of the parametric model. The work presented here is part of a larger study that considered existing bridges of all typical types with a RF ≥ 1.35 were load rated and examined in parametric studies. Broadly, the hypothesis was supported. However, a few cases with a load rating of 1.37 were required to assure the SHV load rating was above 1.00.
Douglas Nims (Committee Chair)
Brian Randolph (Committee Member)
Eddie Chou (Committee Member)
93 p.
Civil Engineering
Bridge; Bridge Load Rating; AASHTOWare BrR; Specialized Hauling Vehicles; Ohio Legal Loads; AASHTO Legal Loads; Parametric Study; ODOT; Civil Engineering

Recommended Citations

Citations

  • Islam, S. (2018). Load Rating Study of Effects of Special Hauling Vehicle Loads on Ohio Bridges [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544818358028013

    APA Style (7th edition)

  • Islam, Shariful. Load Rating Study of Effects of Special Hauling Vehicle Loads on Ohio Bridges. 2018. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544818358028013.

    MLA Style (8th edition)

  • Islam, Shariful. "Load Rating Study of Effects of Special Hauling Vehicle Loads on Ohio Bridges." Master's thesis, University of Toledo, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544818358028013

    Chicago Manual of Style (17th edition)

toledo1544818358028013
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© 2018, some rights reserved.Creative Commons License Load Rating Study of Effects of Special Hauling Vehicle Loads on Ohio Bridges by Shariful Islam is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Toledo and OhioLINK.