大跨刚构桥桥墩抗震优化设计

On anti-seismic optimal design for piers of large-span rigid frame bridge

以省道101线呼图壁石门水电站库区大桥建设工程为研究对象,应用midas有限元分析软件,分别建立不同墩柱截面类型、不同的墩柱高度的抗震计算模型,并采用反应谱分析的方法,得出桥梁结构在地震作用下不同的自振特性和动力响应,对不同墩柱类型和墩柱高度的刚构桥各关键部位的内力进行分析比较。

Taking the construction project at Shimen Hydropower Station at Hutubi along No. 101 Provincial Line as the research object, the paper adopts midas finite element analysis software, establishes the anti-seismic calculation models with various pier cross-sections and piers with various heights, applies the response spectrum analysis, concludes the various natural response features and dynamic responses of bridge structures under the earthquakes, and undertakes the analysis and comparison of the internal forces at key parts of rigid frame bridges with different pier types and pier heights.