Study on Damage and Ductility Performance of High Pier Bridge Structure
In order to improve the seismic performance of the bridge,the calculation models of 15 m,30 m and 60 m high piers are established,and the pushover analysis is carried out by using the first-order mode lateral load distribution mode.The damage indexes such as pier top displacement and pier bottom cur vature and the applicability of different failure criteria to the performance evaluation of high pier bridges are analyzed.The results show that with the increase of pier height,the period of pier column increases,and the high pier is more likely to enter the high-order vibration mode.The distribution of mass participation coeffi cient shows that more mass participates in the high-order vibration mode,and the high pier has certain plas tic deformation and energy dissipation capacity,which provides an important basis for seismic design.
high pier bridgeseismic performanceductility performancepushover analysis
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