United States Department of Transportation
i
Field Monitoring of Integral Abutment Bridges
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2006-07-12
[PDF-16.11 MB]
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Abstract:The project described in this report involved the instrumentation of bridge 109 on the new I-99 extension in central Pennsylvania and continued monitoring and collection of engineering bridge response data at the three previously instrumented bridges and a weather station. The development of a bridge 109 numerical model and evaluation of the Pennsylvania Department of Transportation (PennDOT) Integral Abutment (IA) Design Spreadsheet was completed. Detailed instrument descriptions and installation of each bridge 109 instrument are provided in this report. Bridge response data are presented for bridges 203, 211, and 222, composed of longitudinal abutment displacements, abutment earth pressures, abutment and girder rotations, H-pile bending moments about the weak axis and axial forces, girder strains, and approach slab strains. Four 3-dimensional numerical models were developed to predict IA bridge response for bridges 203, 211, 222, and 109. Comparison between observed bridge response and predicted bridge response is presented and discussed. Finally, evaluation of the PennDOT IA Design Spreadsheet was performed to provide suggested program improvements for all four instrumented bridges. Comparison of predicted bridge response based on the PennDOT IA program and the original design to observed bridge response is also presented and discussed.
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