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Infrastructure Technology Institute

ITI REG Presents Research Results at
Conferences Nationwide

Members of the ITI Research Engineering Group (REG) attended a variety of technical conferences to present the REG’s work and exchange ideas with transportation and infrastructure professionals.

In June 2010, research engineers David Kosnik and Mathew Kotowsky attended the International Bridge Conference in Pittsburgh, Pennsylvania. Kosnik presented a paper, “Noise Localization via Acoustic Emission Monitoring on a Rolling Bascule Bridge”, (co-authored by the other REG members) on locating the source of unusual “banging” noises on a new movable bridge using acoustic emission (AE) technology. AE data from several test configurations showed that the noises were not coming from the bridge’s lift machinery but were instead originating along the bottom flange of the bascule girder where the girder was attached to a track plate. Further testing strongly suggested that the source of the noise was benign, highly-localized stick-slip behavior along the girder-track plate interface as the bridge opened and closed.

In July 2010, research engineer David Kosnik presented at the Review of Progress in Quantitative Non-Destructive Evaluation (QNDE 2010) conference in San Diego, California. QNDE 2010 featured a special track on applications of advanced non-destructive evaluation techniques to civil infrastructure, including bridges, railroad tracks, and pavements. Kosnik presented a paper, “Acoustic Emission Monitoring for Assessment of Steel Bridge Details,” which described the ITI REG’s experience in applications of acoustic emission monitoring to two large fracture-critical highway bridges: the Bryte Bend Bridge, a 4,050-foot-long steel trapezoidal box girder structure which carries Interstate 80 over the Sacramento River in Sacramento, California, and the John F. Kennedy Memorial Bridge, a 2500-foot-long steel cantilever truss which carries Interstate 65 over the Ohio River at
Louisville, Kentucky.

In October 2010, David Kosnik, in collaboration with David Simon, roadside facilities engineer with the Wisconsin Department of Transportation, gave an invited talk to the Western Association of State Highway and Transportation Officials Committee on Highway Transport (WASHTO-COHT) at their meeting in Reno, Nevada. The presentation, “Doing More with Weigh-In-Motion on a Wisconsin-Michigan Border Bridge”, described the combined weigh-in-motion and bridge structural health monitoring system installed by the REG and the Wisconsin Department of Transportation on the US Highway 2 bridge over the Montreal River between Hurley, Wisconsin, and Ironwood, Michigan.

In December 2010, research engineers David Kosnik, Mathew Kotowsky, and Daniel Marron attended the Transportation Research Board’s 7th International Bridge Engineering Conference, held in San Antonio, Texas. Kosnik presented a paper, “Continuous Remote Structural Health Monitoring for Life Extension of an Uplift Bearing Assembly on a Large Cantilever Truss Bridge“, which was co-authored by the other REG engineers and Theodore Hopwood of the University of Kentucky. The paper described instrumentation and monitoring for an uplift bearing on the I-65 John F. Kennedy Memorial Bridge over the Ohio River at Louisville, Kentucky. The uplift bearing monitoring project, which was distinct from the acoustic emission project presented at QNDE 2010, involves continuous remote strain monitoring of a large bridge component, including remote detection of a failure of one of the sub-components.