Taking a wave-shaped steel-web variable-section box girder high-pier continuous curved arch bridge as an ex-ample,a finite element analysis method was used to establish the bridge model,E1 and E2 seismic response spectra were applied to analyze the response of the main beam and main pier of the bridge and to study the seismic performance of the bridge.The results show that,in the horizontal,vertical,and longitudinal earthquake actions on E1 and E2 lateral bearings,there are displacement responses in all three directions,and the earthquake response pattern of E1 is similar to that of E2,and the response caused by E2 is greater than that of E1.The stress response of E2 earthquake is analyzed,and large stres-ses appear at the midspan and the middle of the side spans.Large stresses are likely to appear at the middle and the bot-tom of the four main piers.The combination of the responses in the three directions is calculated according to the square sum,and it is found that the maximum combined displacement of the main beam in different earthquake actions is greater than that of the main pier.
corrugated steel web platecombination structureseismic performancecurved beam bridgerigid frame bridge
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