Dynamic Response of a Frame Steel Bridge Under Earthquake Action
Predicting the ground vibration response of bridge structures is the basis for seismic design of structures.This study presents finite element analyses for a complex steel bridge in Weihai under the action different seismic wave.In order to analyze the seismic response and failure mechanism of the structure more clearly and improve the seismic performance of the bridge structure correctly,this article adopts the time history analysis method.According to the requirements,an artificial seismic wave and two actual seismic waves are selected.The maximum stress and the maximum deflection of the bridge are calculated based on the dynamic analyses,respectively.It is found that the bracing system and the beams between the two columns at the end of the bracing system are the critical members in the steel bridge under seismic action.The maximum displacement of the structure is located on the cantilever beam at the end of the bridge.Based on the numerical results,it is found that the dynamic response of the steel frame bridge is different when the seismic wave is input in the X axis direction and the Y axis direction respectively,but the structure is safe under earthquake action.
steel structure bridgefinite element methodtime course analysisdynamic analysesseismic wave
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