高墩大跨连续刚构桥抗震性能分析
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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。
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.
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.
引文
[1]樊增彬.薄壁空心墩非线性地震反应分析[D].重庆:西南交通大学,2002.
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[3]黄小国.连续刚构桥水平地震反应分析[D].西安:长安大学,2006.
[4]王维,李斌.不同桥墩形式对连续刚构桥抗震性能影响[J].公路工程,2007,32(5):101-104.
[5]竹晓华.连续刚构桥地震反应分析[J].铁路工程学报,2008,(10):15-19.
[6]周勇军,贺拴海,张岗,等.桥墩截面形式对弯连续刚构桥地震响应的影响[J].公路交通科技,2009,26(2):68-72.
[7]徐贤昭,董继恩,王欣南.石佛沟特大桥抗震特性探讨[J].中外公路,2010,30(5):200-203.
[8]李子春.桥墩形式对连续刚构桥动力特性的影响[J].中国公路学报,2011,24(2):70-76.
[9]胡绘新,郑凯锋,杨平.山区公路桥梁桥墩抗震性能的弹塑性分析[J].公路交通科技(应用技术版),2011,(4):165-168.
[10]王宝金.大跨度预应力混凝土连续刚构桥动力特性及P-Δ效应分析[J].国防交通工程与技术,2011,(6):43-47.
[11]白鹤滩水电站对外交通公路工程场地地震安全性评价报告[R].北京:中国地震灾害防御中心,2009.
[12]重庆交通科研设计院.JTG/TB02-01-2008.公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[2]陈海波,刘保东.大跨度高墩连续刚构桥空间地震响应分析[J].工程抗震与加固改造,2005,27(3):78-80.
[3]黄小国.连续刚构桥水平地震反应分析[D].西安:长安大学,2006.
[4]王维,李斌.不同桥墩形式对连续刚构桥抗震性能影响[J].公路工程,2007,32(5):101-104.
[5]竹晓华.连续刚构桥地震反应分析[J].铁路工程学报,2008,(10):15-19.
[6]周勇军,贺拴海,张岗,等.桥墩截面形式对弯连续刚构桥地震响应的影响[J].公路交通科技,2009,26(2):68-72.
[7]徐贤昭,董继恩,王欣南.石佛沟特大桥抗震特性探讨[J].中外公路,2010,30(5):200-203.
[8]李子春.桥墩形式对连续刚构桥动力特性的影响[J].中国公路学报,2011,24(2):70-76.
[9]胡绘新,郑凯锋,杨平.山区公路桥梁桥墩抗震性能的弹塑性分析[J].公路交通科技(应用技术版),2011,(4):165-168.
[10]王宝金.大跨度预应力混凝土连续刚构桥动力特性及P-Δ效应分析[J].国防交通工程与技术,2011,(6):43-47.
[11]白鹤滩水电站对外交通公路工程场地地震安全性评价报告[R].北京:中国地震灾害防御中心,2009.
[12]重庆交通科研设计院.JTG/TB02-01-2008.公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
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