改建铁路包兰线砂金坪黄河特大桥地震响应分析

改建铁路包兰线砂金坪黄河特大桥位于八度地震区,为了探索该桥的动力特性,建立了动力模型,分别采用反应谱法和时程分析方法进行抗震分析,得到该桥的地震反应,对研究中大跨度连续钢桁梁的抗震设计有重要的指导意义。为达到减震的目的,本桥主墩顶采用了速度锁定装置进行减震设置。

The Seismic Response Analysis of Sha Jinping Yellow River Super Bridge on Baotao-Lanzhou Reconstruction Railroad

Sha Jinping Yellow River super bridge on Baotou-Lanzhou reconstruction railroad sites in eight degrees earthquake zone. To explore the bridge＇ s dynamic performance and analyze earthquake resistance, the article establishes the dynamic model, and obtains the bridge＇ s self oscillation characteristic, the influence of earthquake is analyzed with the re- sponse spectral method and the time interval analysis method individually, and the bridge＇ s earthquake response is ob- tained, the paper had the important guiding sense on the study great span continual steel truss girder seismic design. Based on its analysis from the angle of absorption of shock design, the speed fixing device carrying on the absorption of shock establishment is used on the top of the main bridge pillar.