Abstract
This article presents an experimental and analytical study on the seismic performance of a bridge supported by C-bent columns. C-bent columns have a unique failure mechanism due to the eccentric moment. The failure mechanism and nonlinear hysteretic behavior of C-bent columns are first clarified based on a series of loading experiments for fourteen models with the eccentric moment ratio raging from 0.33–0.50. An empirical bilinear stiffness degrading hysteretic model is developed for the torsion vs. rotation hysteresis. The seismic performance of a bridge supported by C-bent columns is analyzed based on a nonlinear dynamic response analysis. Effectiveness of three seismic retrofit measures for C-bent columns is clarified based on a series of loading experiments.
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