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Nonlinear finite-element model updating (FEMU) is a promising approach for post-event damage assessment of civil structures. This paper conducted FEMU for a full-scale reinforced concrete bridge column tested under a sequence of earthquakes and examined the evolution of seismic damage across different earthquake ground motions. It was found that using experimental data, FEMU can be applied to identify unknown key model parameters (e.g. bond-slip and core concrete parameters) and damage of the columns as represented by the change of the key parameters. In addition, the updated models demonstrated their ability to better predict the system response for future earthquakes. [ABSTRACT FROM AUTHOR]

The residual displacement of column has significant effect on the post-earthquake functionality of bridge. In this paper, the nonlinear finite element model of a simply supported beam bridge was built. The seismic performance of reinforced concrete column, unbonded prestressed reinforced concrete (UBPRC) column, and fully prestressed column was compared. Quasi-static residual displacement was adopted in the fragility analysis. The result showed that the quasi-static residual displacement affects the vulnerability of bridge system only for the collapse damage limit state. UBPRC column is a good balance between the vulnerability arising from peak displacement and residual displacement. [ABSTRACT FROM AUTHOR]