English：

Based on a typical reinforced concrete double⁃column three⁃span continuous beam bridgestructure, the influence of the self⁃centering reinforcement device on the transverse seismic performanceof the double⁃column pier is analyzed. Through the seismic fragility analysis based on the IDA method,the fragility curves of the self⁃centering reinforced double⁃column pier structure and the traditional double⁃column pier structure are established. The analysis results show that the spectral acceleration is anappropriate index of ground motion intensity. In the state of slight damage, moderate damage, extensivedamage and complete damage, the self⁃centering reinforcement device can significantly reduce the failureprobability of double⁃column piers.