The objective of this research is to evaluate the effects of different retrofit applications on the global response of short-span reinforced concrete bridges. The global responses investigated include structural displacement and ductility. Modeling element characterizations that vary with the associated retrofit applications are taken as parameters in the sensitivity study. Retrofitting methods addressed in this study include steel jacketing of columns, foundation retrofit, and abutment retrofit. The corresponding parameters representing structural elements include various column-jacketing plans, linear foundation springs, and nonlinear abutment springs. A three-dimensional nonlinear finite-element model of the Dry Wash Bridge was developed and the results were used as the baseline in the parametric studies. A nonlinear modal pushover procedure was employed to perform the analyses in the longitudinal and transverse directions of the bridge. Results were analyzed by conducting a parametric study to evaluate the effects of different retrofit schemes on the bridge global behavior.
Washington State Transportation Center (TRAC)
Bridge abutments, Bridge foundations, Columns, Ductility, Finite element method, Jacketing (Strengthening), Mathematical models, Reinforced concrete bridges, Retrofitting.