地震作用下超高墩刚构桥倒塌易损性分析
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摘要
防止地震作用下结构倒塌是基于性能的地震工程的核心目标,目前基于弹塑性时程分析的倒塌易损性分析是结构抗倒塌能力评价最合理的方法.倒塌易损性分析的关键之一是建立合理的倒塌判别准则,文中提出了超高墩刚构桥地震倒塌破坏的判别准则.结合某工程实例,基于OpenS-ees建立了结构的非线性分析模型,对其进行了非线性地震时程分析,在此基础上建立了结构的易损性曲线,并讨论了混凝土保护层剥落和钢筋锈蚀等结构劣化对倒塌易损性的影响.
An important goal of performance-based seismic design is to prevent collapse of bridges.At present collapse fragility analysis based on the elasto-plastic time-history calculation is the most reasonable method to evaluate the collapse ability.The collapse criterion is the most important problem to be resolved.In this paper,a criterion of collapse for rigid frame bridge with high piers is proposed.An engineering example is demonstrated to study the collapse fragility of a rigid frame bridge with super high piers.The structure model is establish by OpenSees and the nonlinear time-history calculation is carried out to obtain the collapse fragility.Also the effect of deterioration,such as concrete spalling,the decreasing of strength and area of reinforcement,on the collapse fragility is discussed in detail.
An important goal of performance-based seismic design is to prevent collapse of bridges.At present collapse fragility analysis based on the elasto-plastic time-history calculation is the most reasonable method to evaluate the collapse ability.The collapse criterion is the most important problem to be resolved.In this paper,a criterion of collapse for rigid frame bridge with high piers is proposed.An engineering example is demonstrated to study the collapse fragility of a rigid frame bridge with super high piers.The structure model is establish by OpenSees and the nonlinear time-history calculation is carried out to obtain the collapse fragility.Also the effect of deterioration,such as concrete spalling,the decreasing of strength and area of reinforcement,on the collapse fragility is discussed in detail.
引文
[1]陆新征,张万开,柳国环.基于推覆分析的RC框架地震倒塌易损性预测[J].地震工程与工程振动,2012,32(4):1-6.
[2]NIELSON B G.Analytical fragility curves for high-way bridges in moderate seismic zones[D].Atlanta:Georgia Institute of Technology,2005.
[3]BANERJEE S.Statistical,empirical and mechanisticfragility analysis of concrete bridges[D].Irvine:University of California,2007.
[4]HOWARD H,LIN Yangwei.Evaluation of seismicdamage to Memphis bridges and highway system[J].Journal of Bridge Engineering,2000,5(4):322-330.
[5]JAMIE E,PADGETT R D.Retrofitted bridge fra-gility analysis for typical classed of multispan bridges[J].Earthquake Spectra,2009,25(1):117-141.
[6]PAN Y,GHOSN M.Seismic fragility of multispansimply supported steel highway bridges in New YorkState I:Bridge modeling,parametric analysis,andretrofit design[J].Journal of Bridge Engineering,2010,15(5):448-461.
[7]SULLIVAN I T.Analitical seismic fragility curvesfor skewed multi-span steel girder bridges[D].Clem-son:Clemson University,2010.
[8]JOONAM P E C.Fragility analysis of track-on steel-plate-girder railway bridges in korea[J].EngineeringStructures,2011,33(3):696-705.
[9]BAYRAM A L,JAMIE E P.Efficient longitudinalseismic fragility assessment of a multispan continuoussteel bridge on liquefiable soils[J].Journal of BridgeEngineering,2011,16(1):93-107.
[10]张菊辉.基于数值模拟的规则桥梁墩柱的地震易损性分析[D].上海:同济大学,2006.
[11]冯杰.桥梁结构地震易损性分析研究[D].成都:西南交通大学,2010.
[12]梁智垚.非规则高墩桥梁抗震设计理论研究[D].上海:同济大学,2007.
[13]焦驰宇.基于性能的大跨斜拉桥地震易损性分析[D].上海:同济大学,2008.
[14]张凯,朱晞,陈思孝,等.高墩大跨连续刚构桥梁的地震经济风险分析[J].北方交通大学学报,2011,35(6):23-27.
[15]郑成龙,龙晓鸿,彭元诚,等.大跨斜腿刚构桥地震易损性分析[J].土木工程与管理学报,2011,28(3):391-394.
[16]谷音,黄怡君,卓卫东.高墩大跨连续刚构桥梁地震易损性分析[J].地震工程与工程振动,2011,31(2):91-97.
[17]聂利英,张雷,李硕娇.地震作用下大跨度悬索桥纵向破坏模式研究[J].土木工程学报,2011,44(4):91-97.
[18]WILSON J L.Earthquake response of tall rein-forced concrete chimneys[J].Engineering Struc-tures,2003(25):11-24.
[19]FEMA.Applied technology council,federal emer-gency management agency[R].Quantification ofBuilding Seismic Performance Factors,2008.
[2]NIELSON B G.Analytical fragility curves for high-way bridges in moderate seismic zones[D].Atlanta:Georgia Institute of Technology,2005.
[3]BANERJEE S.Statistical,empirical and mechanisticfragility analysis of concrete bridges[D].Irvine:University of California,2007.
[4]HOWARD H,LIN Yangwei.Evaluation of seismicdamage to Memphis bridges and highway system[J].Journal of Bridge Engineering,2000,5(4):322-330.
[5]JAMIE E,PADGETT R D.Retrofitted bridge fra-gility analysis for typical classed of multispan bridges[J].Earthquake Spectra,2009,25(1):117-141.
[6]PAN Y,GHOSN M.Seismic fragility of multispansimply supported steel highway bridges in New YorkState I:Bridge modeling,parametric analysis,andretrofit design[J].Journal of Bridge Engineering,2010,15(5):448-461.
[7]SULLIVAN I T.Analitical seismic fragility curvesfor skewed multi-span steel girder bridges[D].Clem-son:Clemson University,2010.
[8]JOONAM P E C.Fragility analysis of track-on steel-plate-girder railway bridges in korea[J].EngineeringStructures,2011,33(3):696-705.
[9]BAYRAM A L,JAMIE E P.Efficient longitudinalseismic fragility assessment of a multispan continuoussteel bridge on liquefiable soils[J].Journal of BridgeEngineering,2011,16(1):93-107.
[10]张菊辉.基于数值模拟的规则桥梁墩柱的地震易损性分析[D].上海:同济大学,2006.
[11]冯杰.桥梁结构地震易损性分析研究[D].成都:西南交通大学,2010.
[12]梁智垚.非规则高墩桥梁抗震设计理论研究[D].上海:同济大学,2007.
[13]焦驰宇.基于性能的大跨斜拉桥地震易损性分析[D].上海:同济大学,2008.
[14]张凯,朱晞,陈思孝,等.高墩大跨连续刚构桥梁的地震经济风险分析[J].北方交通大学学报,2011,35(6):23-27.
[15]郑成龙,龙晓鸿,彭元诚,等.大跨斜腿刚构桥地震易损性分析[J].土木工程与管理学报,2011,28(3):391-394.
[16]谷音,黄怡君,卓卫东.高墩大跨连续刚构桥梁地震易损性分析[J].地震工程与工程振动,2011,31(2):91-97.
[17]聂利英,张雷,李硕娇.地震作用下大跨度悬索桥纵向破坏模式研究[J].土木工程学报,2011,44(4):91-97.
[18]WILSON J L.Earthquake response of tall rein-forced concrete chimneys[J].Engineering Struc-tures,2003(25):11-24.
[19]FEMA.Applied technology council,federal emer-gency management agency[R].Quantification ofBuilding Seismic Performance Factors,2008.
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