Field Demonstration of New and Emerging Bridge Assessment Technologies

Field Demonstration of New and Emerging Bridge Assessment Te...

Working with the Federal Highway Administration (FHWA) Long-Term Bridge Performance (LTBP) Program, Pennoni’s Intelligent Infrastructure Systems (IIS) carried out a field demonstration of new and emerging bridge assessment technologies for the Pennsylvania Department of Transportation (PennDOT). A two-span steel multigirder bridge in Coraopolis, PA was selected for the development of a 3D finite element model, design of an instrumentation plan for traditional live load testing on the structure, execution of that testing, and demonstration of the THMPER™ (Targeted Hits for Modal Parameter Estimation and Rating) system.  After live load testing was completed, THMPER™ was deployed, requiring merely thirty minutes of traffic interruption to collect data from the entire bridge. The extracted modal parameters agree with those determined from a traditional impact test as well as a finite element model calibrated based on live load testing data.