To study the seismic performance of a large-span,multi-tower cable-stayed water pipeline bridge,an equivalent test model with a scale ratio of 1∶20 was designed based on similarity theory for a shaking table test.The seismic response and seismic performance of the cable-stayed water pipeline bridge were analyzed from various perspectives,including different seismic waves,peak ground acceleration inputs on the platform,and conditions with both empty and full pipes.A combined approach of experimental and numerical simulations was used to comprehensively analyze the seismic performance of the large-span cable-stayed water pipeline bridge.Results show that under the E1 seismic scenario,the structure remains elastic.Under the E2 seismic scenario,some reinforcements yield,and concrete exhibits cracks,but the overall structure remains safe.The increase in seismic response for the full pipe case considering the fluid-structure coupling effect compared to the empty pipe case is smaller than the increase in response when only the water body is modeled with the added mass for the longitudinal bridge seismic input,and the opposite result is obtained for the transverse bridge seismic input.
关键词
斜拉管桥/振动台试验/抗震性能/缩尺模型/有限元分析
Key words
cable-stayed pipeline bridge/shaking table test/seismic performance/scale model/finite element analysis
维普
万方数据