Sunshine Skyway Bridge Monitoring Phase II: System Development
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2021-07-01
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Edition:Final Report, 3/1/2017 – 7/31/2021
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Abstract:The District 7 Structures Maintenance Office sought to take the existing monitoring components on the Sunshine Skyway Bridge and create a centralized monitoring system available via a web interface and capable of providing alerts for anomalous bridge response data. This project included the selection of a web development contractor, the design of a web interface, the development of algorithms to produce bridge response information, analysis of long-term data to establish bounds of typical bridge responses, and recommendations for a bridge alert response plan. To centrally capture the ad hoc monitoring hardware installed, a web map and inventory database was upgraded to reflect the newly installed sensors as well as to dynamically link the database and map. BDI, Inc, developed a web portal that provides data archiving, visualization, and alerts. A System Security plan was developed with input from the Information Security Administration Office. Analysis of a year of monitoring data (2020) was carried out to assess the quality/reliability of the data and to determine the bounds of bridge response to temperature-, wind-, and traffic-induced loading. Accelerometer data were correlated with wind and temperature measurements to establish daily and seasonal response patterns. Cable force estimates match well with cable forces determined in previous studies and show the expected variation with temperature. Analysis of the data provided the basis for establishing alert thresholds (encompassed >99% of the data). An alert response plan has been proposed for responding to alerts generated.
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