轨道结构对板式轨道桥梁抗震性能的分析
|
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。
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.
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.
引文
[1]韩鹏,王君杰,董正方.城市轨道交通高架桥梁抗震设计中的关键问题[J].震灾防御技术,2010,5(1):32-42.
[2]杨丽辉,闫贵平.城市轨道交通桥梁抗震设计中的若干关键性问题[J].防灾减灾工程学报,2007,27(增刊):281-284.
[3]李广慧,刘伟,王中平,等.车辆-无碴轨道-桥梁系统振动特性及其应用[M].郑州:黄河水利出版社,2007.
[4]TB10082-2005铁路轨道设计规范[S].
[5]王冠通.地震作用下桥上无砟轨道的力学特性[D].北京:北京交通大学,2011.
[6]GB50011-2010建筑抗震设计规范[S].
[2]杨丽辉,闫贵平.城市轨道交通桥梁抗震设计中的若干关键性问题[J].防灾减灾工程学报,2007,27(增刊):281-284.
[3]李广慧,刘伟,王中平,等.车辆-无碴轨道-桥梁系统振动特性及其应用[M].郑州:黄河水利出版社,2007.
[4]TB10082-2005铁路轨道设计规范[S].
[5]王冠通.地震作用下桥上无砟轨道的力学特性[D].北京:北京交通大学,2011.
[6]GB50011-2010建筑抗震设计规范[S].
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心