钢管混凝土拱桥地震破坏评估研究
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摘要
为了研究钢管混凝土拱桥的地震破坏程度,基于变形或内力和能量的双重破坏准则确定钢管混凝土拱桥各部分杆件的破坏指数,建立整桥的破坏评估模型,提出钢管混凝土拱桥的地震破坏评估方法。采用数值模拟方法对钢管混凝土拱桥在恒载和地震荷载作用下的内力、变形和累积能量进行分析,对钢管混凝土拱桥进行地震破坏评估,最后以南宁市永和大桥为例进行了分析。结果表明:对于抗震设防烈度为7度的钢管混凝土拱桥,在8度地震作用下全桥处于完好状态,9度地震作用下处于轻微破坏状态,满足抗震设防要求,说明该评估方法能够对地震破坏给出较准确的评估结果。
In order to study the seismic damage conditions of concrete filled steel tube(CFST) bridge from the internal force,deformation and energy,the damage indexes(DI) of all the members were calculated.The evaluation model of the bridge was established and the seismic damage evaluation method of CFST arch bridge was presented.In the research,the internal forces,deformations and accumulated energy of CFST arch bridge were analyzed by numerical simulations under dead load and earthquake,and the seismic damage of CFST arch bridge was evaluated with the example of Nanning Yonghe Bridge.The results show that for the 7-degree seismic fortification intensity zone,the bridge is in perfect condition under 8-degree earthquake and there is only slight damage under 9-degree earthquake,which indicates that the bridge can meet the demands of seismic fortification.
In order to study the seismic damage conditions of concrete filled steel tube(CFST) bridge from the internal force,deformation and energy,the damage indexes(DI) of all the members were calculated.The evaluation model of the bridge was established and the seismic damage evaluation method of CFST arch bridge was presented.In the research,the internal forces,deformations and accumulated energy of CFST arch bridge were analyzed by numerical simulations under dead load and earthquake,and the seismic damage of CFST arch bridge was evaluated with the example of Nanning Yonghe Bridge.The results show that for the 7-degree seismic fortification intensity zone,the bridge is in perfect condition under 8-degree earthquake and there is only slight damage under 9-degree earthquake,which indicates that the bridge can meet the demands of seismic fortification.
引文
[1]HAN Qiang,DU Xiu-li,LIU Jing-bo,et al.SeismicDamage of Highway Bridges During the 2008 Wen-chuan Earthquake[J].Earthquake Engineering andEngineering Vibration,2009,8(2):263-273.
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[16]邱法维,杨卫东,欧进萍.钢管混凝土柱滞回耗能和累积损伤的实验研究[J].哈尔滨建筑大学学报,1996,29(3):41-45.QIU Fa-wei,YANG Wei-dong,OU Jin-ping.TestingResearch for the Dissipated Hysteric Energy and Ac-cumulated Damage of CFST Column[J].Journal ofHarbin University of Architecture and Engineering,1996,29(3):41-45.
[17]阎宇.低周反复水平荷载作用下方钢管混凝土柱损伤模型的研究[D].青岛:青岛理工大学,2010.YAN Yu.Research of Damage Model of Concrete-filled Steel Tube Under Simulant Earthquake Forces[D].Qingdao:Qingdao Technological University,2010.
[18]韩林海,杨有福.现代钢管混凝土结构技术[M].北京:中国建筑工业出版社,2004.HAN Lin-hai,YANG You-fu.The Modern Technolo-gy of Concrete-filled Steel Tubular Structures[M].Beijing:China Architecture&Building Press,2004.
[19]GB/T5224—2003,预应力混凝土用钢绞线[S].GB/T 5224—2003,Steel Strand for Prestressed Con-crete[S].
[20]GB/T17742—1999,中国地震烈度表[S].GB/T 17742—1999,Chinese Seismic Intensity Scale[S].
[21]JTG/T B02-01—2008,公路桥梁抗震设计细则[S].JTG/T B02-01—2008,Guidelines for Seismic Designof Highway Bridge[S]
[2]刘健新,赵国辉.“5.12”汶川地震典型桥梁震害分析[J].建筑科学与工程学报,2009,26(2):92-97.LIU Jian-xin,ZHAO Guo-hui.Typical Bridge Dam-age Analysis in“5.12”Wenchuan Earthquake[J].Journal of Architecture and Civil Engineering,2009,26(2):92-97.
[3]谢开仲.桥梁在地震作用下损伤破坏和倒塌机理研究[R].上海:同济大学,2010.XIE Kai-zhong.The Damage and Collapse Mechanismof Bridges Under Strong Earthquake[R].Shanghai:Tongji University,2010.
[4]钟善桐.钢管混凝土结构[M].3版.北京:清华大学出版社,2003.ZHONG Shan-tong.The Concrete-filled Steel Tubu-lar Structures[M].3rd ed.Beijing:Tsinghua Univer-sity Press,2003.
[5]牛荻涛,任利杰.改进的钢筋混凝土结构双参数地震破坏模型[J].地震工程与工程振动,1996,16(4):44-54.NIU Di-tao,REN Li-jie.A Modified Seismic DamageModel with Double Variables for Reinforced ConcreteStructures[J].Earthquake Engineering and Engineer-ing Vibration,1996,16(4):44-54.
[6]史庆轩.钢筋混凝土结构基于性能的抗震研究及破坏评估[D].西安:西安建筑科技大学,2002.SHI Qing-xuan.Performance Based Seismic Researchand Damage Assessment of Reinforced ConcreteStructures[D].Xian:Xian University of Architec-ture and Technology,2002.
[7]PARK Y J,SANG A H.Mechanistic Seismic DamageModel for Reinforced Concrete[J].Journal of Struc-tural Engineering,1985,111(4):722-739.
[8]CHUNG Y S,MEYER C,SHINOZUKA M.Model-ing of Concrete Damage[J].ACI Structural Journal,1989,86(3):259-271.
[9]MCCABE S L,HALL W J.Assessment of SeismicStructural Damage[J].Journal of Structural Engi-neering,1989,115(9):2166-2183.
[10]于琦,孟少平,吴京.基于变形与能量双重准则的钢筋混凝土结构地震损伤评估[J].土木工程学报,2011,44(5):16-23.YU Qi,MENG Shao-ping,WU Jing.Deformation andEnergy-based Seismic Damage Evaluation of Rein-forced Concrete Structures[J].China Civil Engineer-ing Journal,2011,44(5):16-23.
[11]GHOSH S,DATTA D,KATAKDHOND A A.Esti-mation of the Park-Ang Damage Index for PlanarMulti-storey Frames Using Equivalent Single-degreeSystems[J].Engineering Structures,2011,33(9):2509-2524.
[12]ISHIBASHI T,TSUKISHIMA D.Seismic Damage ofand Seismic Rehabilitation Techniques for RailwayReinforced Concrete Structures[J].Journal of Ad-vanced Concrete Technology,2009,7(3):287-296.
[13]FAHMY M F M,WU Z S,WU G.Seismic Perform-ance Assessment of Damage-controlled FRP-retrofit-ted RC Bridge Columns Using Residual Deformations[J].Journal of Composites for Construction,2009,13(6):498-513.
[14]郭蓉,王铁成,赵少伟,等.方钢管混凝土柱的地震损伤模型[J].河北农业大学学报,2007,30(3):109-112.GUO Rong,WANG Tie-cheng,ZHAO Shao-wei,et al.Seismic Damage Model of Concrete-filled Rec-tangular Tubular Column[J].2007,30(3):109-112.
[15]文永庆.钢骨-钢管混凝土柱双参数破坏准则的研究[D].长沙:湖南大学,2009.WEN Yong-qing.The Research on Double ParameterFailure Criterion of Steel Tube Composite ColumnFilled with Steel Reinforced Concrete[D].Changsha:Hunan University,2009.
[16]邱法维,杨卫东,欧进萍.钢管混凝土柱滞回耗能和累积损伤的实验研究[J].哈尔滨建筑大学学报,1996,29(3):41-45.QIU Fa-wei,YANG Wei-dong,OU Jin-ping.TestingResearch for the Dissipated Hysteric Energy and Ac-cumulated Damage of CFST Column[J].Journal ofHarbin University of Architecture and Engineering,1996,29(3):41-45.
[17]阎宇.低周反复水平荷载作用下方钢管混凝土柱损伤模型的研究[D].青岛:青岛理工大学,2010.YAN Yu.Research of Damage Model of Concrete-filled Steel Tube Under Simulant Earthquake Forces[D].Qingdao:Qingdao Technological University,2010.
[18]韩林海,杨有福.现代钢管混凝土结构技术[M].北京:中国建筑工业出版社,2004.HAN Lin-hai,YANG You-fu.The Modern Technolo-gy of Concrete-filled Steel Tubular Structures[M].Beijing:China Architecture&Building Press,2004.
[19]GB/T5224—2003,预应力混凝土用钢绞线[S].GB/T 5224—2003,Steel Strand for Prestressed Con-crete[S].
[20]GB/T17742—1999,中国地震烈度表[S].GB/T 17742—1999,Chinese Seismic Intensity Scale[S].
[21]JTG/T B02-01—2008,公路桥梁抗震设计细则[S].JTG/T B02-01—2008,Guidelines for Seismic Designof Highway Bridge[S]
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