【摘要】 为研究轨道结构对地震作用下桥梁体系位移、内力的影响,利用大型有限元软件ANSYS建立了考虑和不考虑轨道结构体系的3跨预应力连续箱梁形式的高架桥模型,分析天津宁河波作用时,该高架桥两种情况下的地震响应。结果表明:轨道结构可以加强桥梁体系的整体刚度,地震作用时,考虑轨道结构模型的各方向位移分量和各跨中弯矩及支座处剪力明显小于不考虑轨道结构模型的各方向位移分量和各跨中弯矩及支座处剪力,由此表明,设计中不考虑轨道结构是一种偏于安全的设计方法。更多还原

【Abstract】 In order to study the affect of the track structure on the displacement , internal forces under earthquake , there were two viaduct models established by the large finite element software ANSYS , three-span prestressed continuous box girder type viaduct model was set up considering or without regard to track structure.Under the seismic of Tianjin Ninghe wave , the seismic response analysis was conducted in both cases of the viaduct.The result showed that the track structure could enhance the overall stiffness of the bridge system.Under the earthquake , the displacement of different directions , the span moment and the shear at bearing place were obviously smaller considering track structure model compared to the ones without considering track structure.Thus it is a safety design method when the track structure isn ’ t considered.更多还原