Abstract
In this study, the structural performance of 15-year-old PC box-girder road bridge after reconstruction under severe chloride environment was evaluated. Since non-destructive test should be used for evaluating the structural performance of bridge in service, static and dynamic loading tests using dump trucks, impact vibration test by weight, and forced vibration test by vibration exciter were applied, focusing on the stiffness in whole superstructure, members, and local points in bridge. Also, by carrying out the FEM analysis considering the test results, it was verified the validity of consistency and test methods of various vibration test results with different inspection range. These field testing results reveal that the stiffness of whole superstructure is similar to the design value, the degradation of stiffness in a part of decks is indicated, and in some local points in deck, the stiffness is remarkably decreased.
