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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...
MDTA (Maryland Transportation Authority)
Period of performance
Dundalk, MD

In response to a request from the Port of Baltimore to determine whether bridges could accommodate some extremely oversized vehicles travelling on I-695 to and from the Port of Baltimore to the I-95 corridor, Maryland Transportation Authority (MDTA) was interested in improving load rating factors of several 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 the Bear Creek Bridge (B-Z462051) 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 finite element model to more closely approximate the actual structure’s behavior and the model was then used to compute load ratings and distribution factors using LRFR methodology.

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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