【摘要】 以白鹤滩工程大洪水沟连续刚构桥为研究对象,应用Midas有限元软件,并考虑了边跨支座处的弹性约束作用,建立了该连续刚构桥的整体空间有限元计算模型。对其整体结构进行了静力和基于纤维单元的弹性反应谱和弹性时程分析,探讨了该连续刚构桥采用薄壁空心高墩时的动力性能。分析结果表明:该桥空心薄壁墩在强震作用下结构的强度和位移均能满足08抗震设计细则的要求,同时薄壁空心高墩形式的连续刚构桥桥墩通常并没有进入弹塑性或塑性阶段,在抗震性能方面有较好的优越性。更多还原

【Abstract】 Regarding Dahongshuigou Continuous Rigid Bridge in Baihetan Project as a research object,and in consideration of the elastic restraint effect in side span bearing,the finite element software Midas is used to establish the overall spatial finite element calculating model of the bridge.The whole structure’s static analysis is made,and the analyses for the elastic response spectrum and elastic time history are made based on fiber element.The dynamic characteristics of the bridge with thin-hollow-high piers are also discussed.The analysis results show that the structure intensity and displacement of the bridge’s thin-hollow piers under the action of strong earthquake could satisfy the requirements of seismic design’s 08 detailed rules.At the same time,the long-span continuous rigid bridges with thin-hollow-high piers would have good superiority in seismic performance because the piers usually could not enter into the elastic-plastic or plastic deformation stage.更多还原