考虑材料劣变过程的桥梁地震易损性分析
|
摘要
建立了一套基于概率和非线性有限元的桥梁结构地震性能演变分析方法,分析了材料劣变过程;且结合人工神经网络(ANN)与蒙特卡罗(MC)方法,建立了结构随机能力模型;在能力模型的基础上,通过增量动力分析(IDA),建立了考虑材料劣变过程的需求模型,从而形成地震易损性曲线;并以一座斜拉桥的主塔为例,利用所建立的方法研究了随着服役年限增加结构易损性的变化规律.研究成果可为桥梁的全寿命设计、既有桥梁的运营以及地震风险评估等提供理论依据.
In this study,a material deterioration model is developed.And a structural capacity and demand model by taking material deterioration is developed into consideration with the artificial neural network(ANN)-Mento Carlo(MC) method.Based on the capacity and demand model,fragility curves are formed.Moverever,a case study of the main tower of cable-stayed bridge with the proposed method is provided to illustrate the details and structural vulnerlability.These achievements will provide theoretical basis and analysis support for the life-cycle design,the operation and management,especially the seismic hazard assessment of bridges.
In this study,a material deterioration model is developed.And a structural capacity and demand model by taking material deterioration is developed into consideration with the artificial neural network(ANN)-Mento Carlo(MC) method.Based on the capacity and demand model,fragility curves are formed.Moverever,a case study of the main tower of cable-stayed bridge with the proposed method is provided to illustrate the details and structural vulnerlability.These achievements will provide theoretical basis and analysis support for the life-cycle design,the operation and management,especially the seismic hazard assessment of bridges.
引文
[1]Almusallam A A,Al-Gahtani A S,Aziz A R,et al.Effect ofreinforcement corrosion on flexural behavior of concrete slabs[J].Journal of Materials in Civil Engineering.1996,8:123.
[2]Mohammed T U,Hamada H,Yamaji T.Concrete after 30years of exposure—part II:chloride ingress and corrosion ofsteel bars[J].ACI Materials Journal,2004,101(1):13.
[3]Choe D E,Gardoni P,Rosowsky D,et al.Probabilisticcapacity models and seismic fragility estimates for RC columnssubject to corrosion[J].Reliability Engineering System Safty,2008,93(3),383.
[4]Simon J,Bracci J M,Gardoni P.Seismic response and fragilityof deteriorated reinforced concrete bridges[J].Journal ofStructure Engineering,2010,136(10),1273.
[5]Berto L,Vitaliani R,Saetta A,et al.Seismic assessment ofexisting RC structures affected by degradation phenomena[J].Structural Safety,2009,31:284.
[6]Dekoster M,Buyle-Bodin F,Maurel O,et al.Modelling of theflexural behavior of RC beams subjected to localized anduniform corrosion[J].Engineering Structure,2003,25:1333.
[7]Enright M,Frangopol D M.Probabilistic analysis of resistancedegradation of reinforced concrete bridge beams undercorrosion[J].Engineering Structure,1998,20(11):960.
[8]西安建筑科技大学.CECS220:2007混凝土结构耐久性评定标准[S].北京:中国建筑工业出版社,2007.Xi’an University of Science and Technology Building.CECS220:2007 concrete structure durability evaluation criteria[S].Beijing:China Architecture and Building Press,2007.
[9]Val D V,Pavel A T.Probabilistic evalution of initiation time ofchloride-induced corrosion[J].Reliability Engineering SystemSafty,2008,93(3).91.
[10]Du Y G,Clark L A,Chan A H C.Residual capacity of corrodedreinforcing bars[J].Magazine of Concrete Research,2005,57(3),135.
[11]冯清海.特大桥梁地震易损性与地震风险概率分析[D].上海:同济大学桥梁工程系,2008.FENG Qinghai.Study on seismic vulnerability and riskprobability analysis of super-large bridge[D].Shanghai:Department of Bridge Engineering of Tongji University,2008.
[12]Kiremidjian A S,Bosz N.Evaluation of bridge damage datafrom recent earthquakes[J].NCEER Bulletin,1997,11(2):1.
[13]Shinozuka M,Feng M Q,Lee J H,et a1.Statistical analysis offragility curve[J].Journal of Engineering Mechanics,ASCE,2000,126(12):1224.
[14]Hwang H H M,Huo J R.Probabilistic seismic damageassessment of highway bridges[C]//The 6th US NationalConference on Earthquake Engineering.Seattle:[s.n.],1998:1028-1039.
[15]Choi D E,DesRoches R,Nielson B.Seismic fragility of typicalbridges in moderate seismic zones[J].Engineering Structure,2004,26(2):187
[2]Mohammed T U,Hamada H,Yamaji T.Concrete after 30years of exposure—part II:chloride ingress and corrosion ofsteel bars[J].ACI Materials Journal,2004,101(1):13.
[3]Choe D E,Gardoni P,Rosowsky D,et al.Probabilisticcapacity models and seismic fragility estimates for RC columnssubject to corrosion[J].Reliability Engineering System Safty,2008,93(3),383.
[4]Simon J,Bracci J M,Gardoni P.Seismic response and fragilityof deteriorated reinforced concrete bridges[J].Journal ofStructure Engineering,2010,136(10),1273.
[5]Berto L,Vitaliani R,Saetta A,et al.Seismic assessment ofexisting RC structures affected by degradation phenomena[J].Structural Safety,2009,31:284.
[6]Dekoster M,Buyle-Bodin F,Maurel O,et al.Modelling of theflexural behavior of RC beams subjected to localized anduniform corrosion[J].Engineering Structure,2003,25:1333.
[7]Enright M,Frangopol D M.Probabilistic analysis of resistancedegradation of reinforced concrete bridge beams undercorrosion[J].Engineering Structure,1998,20(11):960.
[8]西安建筑科技大学.CECS220:2007混凝土结构耐久性评定标准[S].北京:中国建筑工业出版社,2007.Xi’an University of Science and Technology Building.CECS220:2007 concrete structure durability evaluation criteria[S].Beijing:China Architecture and Building Press,2007.
[9]Val D V,Pavel A T.Probabilistic evalution of initiation time ofchloride-induced corrosion[J].Reliability Engineering SystemSafty,2008,93(3).91.
[10]Du Y G,Clark L A,Chan A H C.Residual capacity of corrodedreinforcing bars[J].Magazine of Concrete Research,2005,57(3),135.
[11]冯清海.特大桥梁地震易损性与地震风险概率分析[D].上海:同济大学桥梁工程系,2008.FENG Qinghai.Study on seismic vulnerability and riskprobability analysis of super-large bridge[D].Shanghai:Department of Bridge Engineering of Tongji University,2008.
[12]Kiremidjian A S,Bosz N.Evaluation of bridge damage datafrom recent earthquakes[J].NCEER Bulletin,1997,11(2):1.
[13]Shinozuka M,Feng M Q,Lee J H,et a1.Statistical analysis offragility curve[J].Journal of Engineering Mechanics,ASCE,2000,126(12):1224.
[14]Hwang H H M,Huo J R.Probabilistic seismic damageassessment of highway bridges[C]//The 6th US NationalConference on Earthquake Engineering.Seattle:[s.n.],1998:1028-1039.
[15]Choi D E,DesRoches R,Nielson B.Seismic fragility of typicalbridges in moderate seismic zones[J].Engineering Structure,2004,26(2):187
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