JIN Ruyi,SHEN Yanli.Composite Parameter Analysis of Seismic Vulnerability of High Bridge Piers under Pile‑soil Interaction[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(05):1016-1023.
JIN Ruyi,SHEN Yanli.Composite Parameter Analysis of Seismic Vulnerability of High Bridge Piers under Pile‑soil Interaction[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(05):1016-1023. DOI: 10.13409/j.cnki.jdpme.20220128001.
Composite Parameter Analysis of Seismic Vulnerability of High Bridge Piers under Pile‑soil Interaction
To enhance the accuracy of predicting damage to high bridge piers during earthquakes and to understand the effect of pile-soil interaction on the seismic vulnerability, the model for pier columns, caps, and pile-soil systems was established. This model considers the contributions of the higher order modes for composite parameters, including ground motion intensity and displacement ductility ratio. It uses a composite index that integrates the elastic and plastic energy dissipation rates as a structural damage index. Based on the IDA method, the nonlinear dynamic analysis of the system was carried out, and the seismic vulnerability curves of high piers under pile-soil interaction based on composite index were drawn. The results show that the selected composite parameters effectively evaluate the seismic performance and damage state of high piers. The pile-soil interaction allows for a more precise capture of the variation of structural damage probability under earthquakes, as it is more sensitive to strong ground motion.
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