Seismic Evaluation and Retrofit of Bridge Joints
A research program was initiated at the University of Missouri Rolla (UMR) to accomplish the following objectives: 1) investigate the failure of typical bridge bents in the state of Missouri; and 2) propose a retrofit scheme using fiber-reinforced polymers (FRP). A total of two specimens were tested under fully reversed cyclic lateral load. Prior to undergoing any strengthening, Unit 1 was tested up to onset of shear failure in the column. At this performance level, the column was strengthened using carbon FRP (CFRP) sheets to increase its shear and confinement capacity. After retrofit, testing proceeded up to onset of joint shear failure in the bent cap. At this performance level, the bent cap was strengthened with CFRP sheets to increase its joint shear capacity. Testing continued until failure of the test unit was observed. Unit 2 was strengthened according to the same retrofit scheme as in Unit 1, but strengthening was fully completed prior to testing. Unit 2 testing proceeded according to the same loading protocol as in Unit 1 for comparison reasons.
N. J. Ereckson et al., "Seismic Evaluation and Retrofit of Bridge Joints," Proceedings of the 4th National Seismic Conference and Workshop on Bridges and Highways, Feb 2004.
Civil, Architectural and Environmental Engineering
Alaska. Department of Transportation and Public Facilities
United States. Federal Highway Administration
Missouri. Department of Transportation
Article - Conference proceedings