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Load Testing of Permit Restricted Bridges – Bear Creek Bridg...

Load Testing of Permit Restricted Bridges – Bear Creek Bridge

Load Testing of Permit Restricted Bridges – Bear Creek Bridg...
Owner
MDTA (Maryland Transportation Authority)
Period of performance
2016
Location
Dundalk, MD

Concerned with the high volume of permit requests being received from oversized vehicles travelling on I-695 from the Port of Baltimore to the I-95 corridor, MDTA was interested in improving load rating factors of permit restricted bridges to reduce the need for individual escorts and bridge closures. To better approximate the dead and live load demands on superstructure members of Bear Creek Bridge, a diagnostic load test was performed. A three-dimensional finite element model was developed to plan instrumentation, predict test responses for confirmation of assumptions and general safety during load testing, and for calibration using test data. A load test using trucks of known weights and dimensions was then carried out while measuring specific bridge responses. These responses were used to calibrate the model to more closely approximate the actual structure’s behavior and the model was then used to compute load ratings 4 of the most common permit vehicles using LRFR methodology for use by MDTA.

Thomas Golecki, SE, PE
Thomas Golecki, SE, PEPractice Leader - Modeling and Simulation
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Jeffrey E. Purdy, PE
Jeffrey E. Purdy, PEChief Operating Officer
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John Prader, PhD, PE
John Prader, PhD, PEPractice Leader - Emergency Response
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Nathaniel Dubbs, PhD, PE
Nathaniel Dubbs, PhD, PEPractice Leader - Monitoring of Performance and Risk
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Istiaque Hasan, PhD
Istiaque Hasan, PhDPractice Leader – Nondestructive Testing and Evaluation
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