Studies on the Dynamic Performance of the Continuous Rigid Frame Bridge Impacted by the Damage at Some Key Positions of the Side Piers

摘要

Continuous rigid frame bridge is widely used in bridge construction because of its superior characteristics. Shown in previous studies, the key positions of the side piers or lower piers at the top and the bottom yield firstly and then get into the plastic stage under the seismic action. So in this condition, dynamic analysis of the continuous rigid frame bridge impacted by the consolidation damage that may occur at the pier top and the bottom is studied in the paper. In the process, the consolidation damage degree is introduced in order to characterize the damage qualitatively. And then Midas/Civil 2010 is adopted to analyze the structure by modelling. Finally, some conclusions are drawn, including that the consolidation damage has a significant impact on the dynamic properties, effect on the structure when the damage happens at the two key sections is extremely close, and almost all values of the dynamic feature changes are located within the condition when the damage degree is less than 10%. The work introduced in this paper may provide a valuable reference for the seismic analysis and the technique of damage identification and location in continuous rigid frame bridges.