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Testing of a new Ice Presence and State Sensor on Above Deck Structure of a Bridge

Byanjankar, Manil, Byanjankar
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1469210722

Abstract Details

2016, Master of Science, University of Toledo, Civil Engineering.
The Veterans’ Glass City Skyway (VGCS) Bridge is a large cable-stayed bridge, which crosses Maumee River in Toledo, Ohio. It is located in an area, which has a history of icing events. Since starting operation in June 2007, six major icing events have occurred. The icing events have resulted in lane and bridge closures. These icing events cause a potential hazard for motorists traveling on the bridge from the falling ice. The Ohio Department of Transportation (ODOT) chose to pursue an administrative management approach for the icing problem of the VGCS. This strategy involves the development of real-time monitoring system to detect the presence, condition, and thickness of ice on the stay which helps bridge operators to make the appropriate decisions. In order to provide the accurate data to the monitoring system, a sensor network was implemented on the bridge. This includes two new sensors developed by the UT icing research team: the UT Ice Presence and State Sensor (UT State Sensor) and the UT optical thickness sensor. These sensors were deployed on the VGCS in the summer of 2015. The UT State Sensor mounts on the stay surface to detect whether water on the stay is liquid or ice. This is critical because water beneath the ice is a precursor to ice shedding and existing sensors do not directly measure conditions on the stay. The UT State Sensor found the water beneath the ice layer during the laboratory experiments performed indoors and at UT’s outdoor field station. The UT Optical Thickness Sensor reports the thickness of ice present on the stay. The UT Optical Thickness Sensor was successfully tested in indoor laboratory. The field testing of the UT State Sensor was performed in the winter of 2015-16 on the VGCS. The data from the sensor was studied and compared to the field observation made by the ODOT personnel for several days. This winter had some days where there was a thin layers of ice formed in some places on the stays, but no ice which could cause shedding hazard was formed. The visual observations were compared with sensor output. The UT State Sensor showed ice in the same position as was observed on December 5, 2015 and December 6, 2015. The sensor output did not match the visual observation on February 24, 2016 event. The output from the UT State Sensor during the field testing on the VGCS was promising and it was concluded that more field testing was necessary. Experiments were conducted to determine the accuracy of the UT State Sensor in detecting water beneath the ice. Thirty-one freeze – thaw cycles were performed on the UT State Sensor and compared its result with visual inspection of ice. The UT State Sensor always indicated the ice to water transition and found the water beneath the ice, which is a precursor to shedding. Also, the UT State Sensor was able to detect the ice presence with significant accuracy. Overall, sensors that can make direct measurements of conditions on the stay were developed. This includes the ability to measure water beneath the ice. This layer of water is a precursor to shedding. This overcomes the inability of existing commercial sensors to directly measure conditions on the stay.
Douglas Nims, Ph.D (Committee Chair)
Victor Hunt, Ph.D (Committee Member)
Cyndee Gruden, Ph.D (Committee Member)
158 p.
Civil Engineering; Electrical Engineering; Engineering; Environmental Engineering
VGCS; icing event; ODOT; dashboard; UT Ice Presence and State Sensor; UT Optical Thickness Sensor

Recommended Citations

Citations

  • Byanjankar, Byanjankar, M. (2016). Testing of a new Ice Presence and State Sensor on Above Deck Structure of a Bridge [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1469210722

    APA Style (7th edition)

  • Byanjankar, Byanjankar, Manil. Testing of a new Ice Presence and State Sensor on Above Deck Structure of a Bridge. 2016. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1469210722.

    MLA Style (8th edition)

  • Byanjankar, Byanjankar, Manil. "Testing of a new Ice Presence and State Sensor on Above Deck Structure of a Bridge." Master's thesis, University of Toledo, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1469210722

    Chicago Manual of Style (17th edition)

toledo1469210722
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This open access ETD is published by University of Toledo and OhioLINK.