Capacity and Behavior of Older T-Beam Bridges
Since late 2011, UMaine and the Maine Department of Transportation (MaineDOT) have partnered to field test 28 bridges of various types. This testing has resulted in improved capacity estimates and rating factors for many of these bridges. Concrete T-beam bridges are an important class of structures that has seen limited investigation. These structures are often viewed as quite robust and are often in good condition, but possess very low rating factors. The proposed testing and advanced analysis of T-beam structures will provide the MaineDOT broadly applicable guidance regarding the capacity of these structures and address live load distribution in and capacity of skewed T-beam bridges. Five concrete T-beam bridges with significant skew angles will be load tested, and strains measured with the MaineDOT’s BDI strain measurement system. Loads approaching HL-93 with impact will be employed using four heavily loaded dump trucks provided by the MaineDOT. The results of the five tests will be pooled with those of five un-skewed T-beams tested with the same protocols under a previous contract in 2017. Finite-element (FE) models will be constructed for the bridges, and the models will be validated/calibrated with the field data. Modifications to analytical rating factors and capacities will be determined using both the FE models and conventional code-based calculations. The effect of skew will be quantified.
- Contract to a Performing Organization has not yet been awarded.
- Status: Programmed
Augusta, ME United States 04333
- Start Date: 20180301
- Expected Completion Date: 0
- Actual Completion Date: 0
- TRT Terms: Concrete bridges; Field tests; Finite element method; Load factor; Load tests; Skew bridges; T beams
- Geographic Terms: Maine
- Subject Areas: Bridges and other structures; Design; Highways;
- Accession Number: 01656648
- Record Type: Research project
- Source Agency: Maine Department of Transportation
- Files: RiP, STATEDOT
- Created Date: Jan 22 2018 10:40AM