新疆伊犁河大桥主桥地震响应分析
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摘要
研究目的:新疆伊犁河大桥是连接218国道和313省道的重点控制工程,主桥为(66+5×120+66)m双肢薄壁连续刚构桥,该桥被称为新疆第一大桥。桥址位于7度地震区内,目前对这类大跨度连续刚构桥的地震反应研究很少。为保证该桥的抗震安全,研究该桥的地震响应规律,为同类桥梁设计提供参考依据。研究结论:通过分析得出:(1)对于连续刚构桥而言,塑性铰的位置出现在刚构墩的墩顶及墩底,抗震设计时需要加强此处的设计;(2)该大桥在地震反应下,虽然出现塑性铰,但与破坏位移还有一定的距离;(3)该桥具有一定的延性能力,满足大震不倒的要求。
Research purposes:The Yili River Bridge is an important project to connect the 218 National Highway with 313 Provincial Highway and is the largest bridge in Xingjiang with main bridge of coupled thin wall continuous rigid frame bridge(66+5×120+66) m.It is located in 7 degree earthquake region.As there is a little research on the seismic response of long span continuous rigid frame bridge is very rare,it is necessary to research the seismic response regulations of this bridge to make sure the bridge safety and provide the reference to the similar works. Research conclusions:From the analysis it is concluded(1) For the continuous rigid frame bridge,the plastic hinges region is on the top or bottom of frame pier and where need to be strengthened.(2) Under the seismic reaction,the plastic hinges happen to this bridge,but they keep certain away from the damaged displacement.(3) The Yili River Bridge has enough ductility and it can not fall under the serious earthquake.
Research purposes:The Yili River Bridge is an important project to connect the 218 National Highway with 313 Provincial Highway and is the largest bridge in Xingjiang with main bridge of coupled thin wall continuous rigid frame bridge(66+5×120+66) m.It is located in 7 degree earthquake region.As there is a little research on the seismic response of long span continuous rigid frame bridge is very rare,it is necessary to research the seismic response regulations of this bridge to make sure the bridge safety and provide the reference to the similar works. Research conclusions:From the analysis it is concluded(1) For the continuous rigid frame bridge,the plastic hinges region is on the top or bottom of frame pier and where need to be strengthened.(2) Under the seismic reaction,the plastic hinges happen to this bridge,but they keep certain away from the damaged displacement.(3) The Yili River Bridge has enough ductility and it can not fall under the serious earthquake.
引文
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[2]JTJ/T B02—01—2008,公路桥梁抗震设计细则[S].JTJ/T B02—01—2008,Detailed Rules of HighwayBridge Seismic Design[S].
[3]郝文化,叶裕明,刘春山,等.ANSYS土木工程应用实例[M].北京:中国水利水电出版社,2005.Hao Wenhua,Ye Yuming,Liu Chunshan,etc.ANSYSApplication Example for Civil Engineering[M].Beijing:China Water Conservancy and HydropowerPress,2005.
[4]赖苍林.基于环境振动的大跨度连续刚构桥地震响应分析[D].福州:福州大学,2005.Lai Canglin.Seismic Response Analysis of Long-spanContinuous Rigid Frame Bridge Based onEnvironmental Excitation[D].Fuzhou:FuzhouUniversity,2005.
[5]胡聿贤.地震工程学[M].北京:地震出版社,1988.Hu Yuxian.Earthquake Engineering[M].Beijing:Earthquake Press,1988.
[6]李杰,李国强.地震工程学导论[M].北京:地震出版社,1992.Li Jie,Li Guoqiang.Earthquake Engineering Introduction[M].Beijing:Earthquake Press,1992.
[7]吴延伟.大跨度连续刚构桥罕遇地震下抗震分析[J].铁道工程学报,2010(2):54-59.Wu Yanwei.Seismic Response Analysis of Long-spanContinuous Rigid Frame Bridge Based on RareEarthquake[J].Journal of Railway Science andEngineering,2010(2):54-59.
[8]朱伯龙,董振祥.钢筋混凝土非线性分析[M].上海:同济大学出版社,1984.Zhu Bolong,Dong Zhenxiang.Nonlinear Analysis ofReinforced Concrete[M].Shanghai:Tongji University,1984.
[9]弓俊青,朱晞.钢筋混凝土空心圆端墩柱截面弯曲承载力和延性的分析研究[J].土木工程学报,2001(2):11-16.Gong Junqing,Zhu Xi.Study on Capacity and Ductilityof Reinforced Roncrete Piers with Hollow Round-noseSection[J].China Civil Engineering Journal,2001(2):11-16.
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