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Schultz_A

Research Abstracts Online
January 2009 - March 2010

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University of Minnesota Twin Cities
Institute of Technology
Department of Civil Engineering

PI: Arturo Schultz

Wakota Bridge Monitoring Program

These researchers are investigating the procedures required by the Load and Resistance Factor Design (LRFD) specifications of the American Association of State and Highway Transportation Officials (AASHTO) for determining thermal forces in bridge piers. Strain gauges and linear potentiometers have been installed in the Wakota bridge superstructure and substructure and will be used to determine the axial forces, bending moments, strains, and stresses in the structure. Of primary interest are the magnitudes of the changes in pier axial forces, bending moments, and shear forces. The pier forces inferred from the field measurements are used, in conjunction with analysis of the bridge to evaluation, and if necessary, modify the AASHTO LRFD specifications procedures for thermal effects. The analysis takes the form of a three-dimensional finite element model constructed in ABAQUS. Using both the field data and the computer model, it will be possible to develop a representation of the behavior of the bridge as a whole with respect to thermal affects.

Group Member

Chris Scheevel, Graduate Student