Seismic Fragility Analysis of Isolated Bridge based on IDA Method
ZOU Qin
MA Yuhong
Abstract：Aiming at the popularization and application of the anti-seismic technology in our country's bridge field, this paper establishes a isolated bridge, based on incremental dynamic analysis ( IDA) method and studies the dynamic response of the bridge under single ground motions, finally gets the response curve ( IDA curve) of the pier and abutment under ground motions. Using the displacement ductility factor of the pier and abutment shear strain as the damage index, this paper divides the damage state interval of IDA curves. According to the IDA curves, we can find the isolated bridge has a good seismic performance, and the bearing is more easy to damage than the pier. Finally, we calculate the overall vulnerability damage state of the bridge by considering the stand and piers as a whole.
Keywords：Isolated bridgeIncremental dynamic analysisEarthquakeDamage indexOverall Vulnerability
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 66-70 )