Bridge Management

Ohio LTAP Center / Ohio Depart

#9135082

Wednesday, October 11, 2017
12:30 p.m. - 2 p.m. EDT

CM | 1.50

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Overview

         Field Testing, 3D Modeling, and Load Rating of the Transit Track Bridges over Lorain Avenue

         Built in 1967, twin two span continuous steel through girder bridges carry eastbound and westbound commuter trains

         over Lorain Avenue in Cleveland, Ohio. A crack in the web of the east fascia girder of the westbound bridge was

         discovered in August 2005, followed by the discovery of a similar crack in June 2014. As the bridges are fracture critical,

         have existing web cracks and were constructed prior to the institution of fracture control plans and fracture toughness

         requirements, Greater Cleveland Regional Transit Authority (GCRTA) hired Michael Baker International (MBI) to inspect

         and evaluate the bridges to determine the cause of the observed cracking, compute a load rating, and suggest potential

         retrofits to mitigate future cracking. Purdue University's S-BRITE Center performed the instrumentation and data

         collection which consisted of strain gaging the steel superstructure and placing linear position sensors on the bridges.

         Following the inspection and data collection, MBI built a bridge model using 3D finite element software and calibrated it

         to the bridge using strains collected during the field tests. Once calibrated, the model was then used to understand the

         web cracking mechanism, predict future potential crack locations, evaluate the feasibility of proposed retrofits and load

         rate the bridges.

         Licking County 5-year Bridge Program: Managing and Replacing 158 Deteriorated Structure Assets

         As our nation's infrastructure ages, emphasis is placed on inspection and remediation of bridges and structures. This

         presentation describes the 5-year bridge program that the Licking County Engineer developed to identify, manage,

         repair and replace aging county owned structures. Gannett Fleming assisted The Licking County Engineer with identifying

         the known deteriorated bridge and culvert structures and making site visits to evaluate 158 bridges to update the

         general appraisal ratings. Each bridge was evaluated and prioritized for repair and/or replacement. The bridges were

         found to be in various conditions from poor to critical and some were closed. The bridges were ranked from "0" to "5". A

         bridge with a rating of "0" was either closed or posted for significant load reductions. A bridge with a rating of "5" was

         recommended to the back of the repair/replacement list. Licking County used the bridge ranking list to request additional

         general funds to repair and/or replace these deteriorated bridge and culvert assets. The general funds were successfully

         lobbied and used to replace a large number of bridges and culverts over the 5-year period. This presentation highlights

         the findings of the 5-year bridge program, including successful repair and replacement of a large number of Licking

         County owned bridges.

         Structural Testing and Monitoring of the I-15 Virgin River Bridges

         Four steel bridges located on a remote stretch of Interstate 15 in northern Arizona are currently the subject of a study

         involving visual inspection, load testing, long-term instrumentation and remote health monitoring. The project is being

         funded by the Arizona Department of Transportation (ADOT) through a FHWA Accelerated Innovation Deployment

         Grant. The purpose of the project is to utilize state of the art structure health monitoring technologies to provide

         information that will ensure the safety of the traveling public and provide better information to assist ADOT in short and

         long term decision making about these significant bridges. The steel bridges currently exhibit widespread fatigue

         cracking. The presentation will provide a status update on the project which began in 2016 and will be ongoing through

         2018, including a discussion of items such as history of the bridges, visual inspection efforts and documentation,

         analytical modeling work, load testing and instrumentation, instrumentation selection, fatigue analysis, site challenges,

         and long-term monitoring plan.

Speakers

Edward Cinadr

Invited Speaker

Bridge Engineer and Project Manager at Burgess & Niple, Inc. Read More

Daniel Kent

Invited Speaker

Senior Structural Engineer and Certified Bridge Inspector at Gannett Fleming Engineers and Architects, P.C. Read More

Michael Bline

Invited Speaker

Bridge Engineer, Licking County Engineer's Office

Edward Baznik

Invited Speaker

Bridge Engineer, Michael Baker International LLC

Chris Cummings

Invited Speaker

Professional Engineer, Michael Baker International LLC Read More

Contact Info

Jerry Garrison, Jerry.Garrison@dot.ohio.gov