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Research Abstracts Online
January 2009 - March 2010

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

PI: Carol K. Shield
Co-PI: Catherine E. French

Cast-in-Place Concrete Connections for Precast Deck Systems

The University of Minnesota is exploring the development of design recommendations and improved detailing for precast composite slab span systems (PCSSSs) to be used for short to medium span bridges. A key focus of the study is the development of appropriate detailing to prevent the creation and propagation of reflective cracks in the cast-in-place concrete. To check design assumptions and the behavior of the system in the areas of interest, finite element (FE) modeling of the system has been applied. Portions of two (single- and two-span) large-scale PCSSS bridges and seven subassemblages were constructed, instrumented, and tested in the University of Minnesota Structural Engineering Laboratory. FE models calibrated to the measured data are being applied to investigate design assumptions, crack control reinforcement detailing, and skew arrangements of the bridges. After completion of the tests and analyses, it will be possible to determine if this bridge system performs satisfactorily or if there are recommended changes that must be made to the design.

Group Members

Brock Hedegaard, Graduate Student
David Klaseus, Graduate Student