多跨连续钢筋混凝土刚架拱桥的抗震分析
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摘要
以汶川大地震中倒塌的某钢筋混凝土刚架拱桥为例,采用杆端塑性铰模型、反应谱分析、弹性时程分析和动力弹塑性分析方法对其进行地震响应分析。根据两阶段抗震设计思想,确定表达两阶段水平的反应谱,选择了3组具有3个方向完整记录的地震地面加速度时程历史和1条人工地震波。研究结果表明:多跨连续钢筋混凝土刚架拱桥结构复杂,振型频率密集,振型参与质量分布离散;考虑桩-土-结构共同作用后,刚架拱桥在地震作用下结构内力和截面塑性转角增加;基础的非对称水平位移改变了结构的振动特性,显著增加基础水平抗推刚度较弱一侧主(次)拱腿的地震力和塑性变形,加剧了地震破坏作用。研究结论为多跨连续钢筋混凝土刚架拱桥抗震性能评估提供参考依据。
The paper analyzed the seismic behavior of a reinforced concrete rigid-frame arch bridge which collapsed in Wenchuan earthquake using the spectral analysis method,the elastic dynamic analysis method and the elasto-plastic dynamic analysis method.According to the two-stage aseismic principle,3 natural ground acceleration records and 1 artificial record were selected.The results show that: due to its structural complexity,the vibration frequencies of the multi-span continuous rigid-frame arch bridge are close to each other,and the modal participation mass is widely separated.Structural inter-forces and plastic rotation of RC section become larger when considering the soil-pile-structure interaction.The asymmetric longitudinal displacement of the foundation changes the vibration characteristics of the structure,and substantially increases the inter-forces and plastic deflections of main and minor arch legs on the foundation with weaker horizontal stiffness.The study may give a reference to seismic performance evaluation of multi-span continuous rigid-frame arch bridges.
The paper analyzed the seismic behavior of a reinforced concrete rigid-frame arch bridge which collapsed in Wenchuan earthquake using the spectral analysis method,the elastic dynamic analysis method and the elasto-plastic dynamic analysis method.According to the two-stage aseismic principle,3 natural ground acceleration records and 1 artificial record were selected.The results show that: due to its structural complexity,the vibration frequencies of the multi-span continuous rigid-frame arch bridge are close to each other,and the modal participation mass is widely separated.Structural inter-forces and plastic rotation of RC section become larger when considering the soil-pile-structure interaction.The asymmetric longitudinal displacement of the foundation changes the vibration characteristics of the structure,and substantially increases the inter-forces and plastic deflections of main and minor arch legs on the foundation with weaker horizontal stiffness.The study may give a reference to seismic performance evaluation of multi-span continuous rigid-frame arch bridges.
引文
[1]交通部公路规划设计院.JTJ 044-89公路工程抗震设计规范[S].北京:人民交通出版社,1989.Ministry of Transport Highway Planning and Design Institute.JTJ 044-89 Code for seismic design highway engineering[S].Beijing:China Communications Press,1989.(in Chinese)
[2]中华人民共和国交通运输部.JTG/T B 02-01-2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.Ministry of Transport of the People’s Republic of China.JTG/T B 02-01-2008 Guidelines for seismic design of highway bridges[S].Beijing:China Communications Press,2008.(in Chinese)
[3]Penzien J,Scheffey C F,Parmelee R A.Seismic analysis of bridges on long piles[J].Journal of the Engineering Mechanics Division,1964,90(3):223―254.
[4]Han Y C.Study of vibrating foundations considering soil-pile-structure interaction for practical applications[J].Earthquake Engineering and Engineering Vibration,2008,7(3):321―327.
[5]Maheshwari B K.Three-dimensional nonlinear analysis for seismic soil-pile-structure interaction[J].Soil Dynamics and Earthquake Engineering,2004,24(4):343―356.
[6]胡四德,范立础.江阴长江公路大桥纵向地震反应分析[J].同济大学学报,1994,22(4):433―438.Hu Side,Fan Lichu.The longitudinal earthquake response analysis for the Jiangyin Yangtze River Bridge[J].Journal of Tongji University,1994,22(4):433―438.(in Chinese)
[7]范立础,胡四德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.Fan Lichu,Hu Side,Ye Aijun.Seismic design of long span bridges[M].Beijing:China Communications Press,2001.(in Chinese)
[8]范立础,聂利英,李建中.地震作用下板式橡胶支座滑动的动力性能分析[J].中国公路学报,2003,16(4):30―35.Fan Lichu,Nie Liying,Li Jianzhong.Dynamic characteristic analysis of laminated rubber bearing sliding under earthquake[J].China Journal of Highway and Transport,2003,16(4):30―35.(in Chinese)
[9]王松涛,曹资.现代抗震设计方法[M].北京:中国建筑工业出版社,1997.Wang Songtao,Cao Zi.Modern seismic design method[M].Beijing:China Architecture&Building Press,1997.(in Chinese)
[10]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.Jiang Jianjing,Lu Xinzheng,Ye Lieping.Finite element analysis of concrete structures[M].Beijing:Tsinghua University Press,2005.(in Chinese)
[11]Federal Emergency Management Ageny.NEHRP guidelines for the seismic rehabilitation of buildings[R].Washington D.C.:FEMA-356,2000.
[12]Applied Technology Council.Seismic evaluation and retrofit of concrete buildings[R].Redwood City,California:Report No.ATC-40.Applied Technology Council,1996.
[13]Takeda T,Sozen M A,Nielsen N N.Reinforced concrete response to simulated earthquakes[J].Journal of the Structural Division,ASCE,1970,96(12):2557―2573.
[14]中华人民共和国建设部.GB50011-200建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.Ministry of Housing and Urban-Rural Development of the People’s Republic of China.GB50011-2001 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2001.(in Chinese)
[2]中华人民共和国交通运输部.JTG/T B 02-01-2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.Ministry of Transport of the People’s Republic of China.JTG/T B 02-01-2008 Guidelines for seismic design of highway bridges[S].Beijing:China Communications Press,2008.(in Chinese)
[3]Penzien J,Scheffey C F,Parmelee R A.Seismic analysis of bridges on long piles[J].Journal of the Engineering Mechanics Division,1964,90(3):223―254.
[4]Han Y C.Study of vibrating foundations considering soil-pile-structure interaction for practical applications[J].Earthquake Engineering and Engineering Vibration,2008,7(3):321―327.
[5]Maheshwari B K.Three-dimensional nonlinear analysis for seismic soil-pile-structure interaction[J].Soil Dynamics and Earthquake Engineering,2004,24(4):343―356.
[6]胡四德,范立础.江阴长江公路大桥纵向地震反应分析[J].同济大学学报,1994,22(4):433―438.Hu Side,Fan Lichu.The longitudinal earthquake response analysis for the Jiangyin Yangtze River Bridge[J].Journal of Tongji University,1994,22(4):433―438.(in Chinese)
[7]范立础,胡四德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.Fan Lichu,Hu Side,Ye Aijun.Seismic design of long span bridges[M].Beijing:China Communications Press,2001.(in Chinese)
[8]范立础,聂利英,李建中.地震作用下板式橡胶支座滑动的动力性能分析[J].中国公路学报,2003,16(4):30―35.Fan Lichu,Nie Liying,Li Jianzhong.Dynamic characteristic analysis of laminated rubber bearing sliding under earthquake[J].China Journal of Highway and Transport,2003,16(4):30―35.(in Chinese)
[9]王松涛,曹资.现代抗震设计方法[M].北京:中国建筑工业出版社,1997.Wang Songtao,Cao Zi.Modern seismic design method[M].Beijing:China Architecture&Building Press,1997.(in Chinese)
[10]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.Jiang Jianjing,Lu Xinzheng,Ye Lieping.Finite element analysis of concrete structures[M].Beijing:Tsinghua University Press,2005.(in Chinese)
[11]Federal Emergency Management Ageny.NEHRP guidelines for the seismic rehabilitation of buildings[R].Washington D.C.:FEMA-356,2000.
[12]Applied Technology Council.Seismic evaluation and retrofit of concrete buildings[R].Redwood City,California:Report No.ATC-40.Applied Technology Council,1996.
[13]Takeda T,Sozen M A,Nielsen N N.Reinforced concrete response to simulated earthquakes[J].Journal of the Structural Division,ASCE,1970,96(12):2557―2573.
[14]中华人民共和国建设部.GB50011-200建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.Ministry of Housing and Urban-Rural Development of the People’s Republic of China.GB50011-2001 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2001.(in Chinese)
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