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Investigation Of Cause Of Cracked Stringer On The Blanchette Bridge, Ward Marianos Jr., Genda Chen, Nestore Galati, Fabio Matta
Investigation Of Cause Of Cracked Stringer On The Blanchette Bridge, Ward Marianos Jr., Genda Chen, Nestore Galati, Fabio Matta
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The Blanchette Bridge carries Interstate 70 across the Missouri River, connecting St. Louis and St. Charles counties in eastern Missouri. The westbound bridge was constructed in 1958. In 1979, the original reinforced concrete roadway deck on the bridge was replaced with a steel grid deck system, welded to supporting girders and stringers. In 1999 and 2005, cracks were discovered in stringers on the bridge approach spans. The stringers were repaired with bolted splices.
The investigation of the cracking included preliminary analyses, review of historical documents, detailed finite element analyses, and field testing of the bridge. The cracking was determined to …
Seismic Retrofit Of Ciss Pile Bent Cap Connections, Michael C. Lubiewski, Pedro Franco Silva, Genda Chen
Seismic Retrofit Of Ciss Pile Bent Cap Connections, Michael C. Lubiewski, Pedro Franco Silva, Genda Chen
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Three 4/5-scale units were cast, retrofitted, and tested under simulated seismic loads. These units were built to model a bridge bent consisting of a cast in place steel shell (CISS) column foundation shaft and a bent cap configured to form a tee connection. Each unit was retrofitted in the column, bent cap, and their connection according to current seismic design standards. The main objective was to ensuring ductile performance under lateral loads.
Specific seismic improvements made to the column and the bent cap system were: (1) the moment capacity of the column was reduced by cutting a portion of the …