基于地震易损性的桥梁抗震加固优先级评定方法研究
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摘要
文章将地震易损性分析理论应用于桥梁抗震加固评定中,提出一种新型桥梁抗震加固优先级评定方法,并给出详细的评估流程。该方法基于地震易损性曲线,可以针对不同水准的地震强度水平,判别桥梁结构中最需要进行抗震加固的易损构件以及这些桥梁构件的抗震加固优先级,以制定合理的抗震加固方案。将该方法应用于一座6跨钢筋混凝土连续梁桥,结果表明该方法的优越性。
A novel prioritization method for seismic retrofitting of bridges is presented by applying the probability-based seismic design of bridges to the prioritization of seismic retrofitting of bridges.The detailed identification process is provided.Based on the seismic fragility curves of bridges,the method can be used to identify the most damageable bridge components subjected to different seismic levels and the rank priority of retrofitting.Then the rational seismic retrofitting programs for bridges can be made.The superiority of the suggested method is shown by its application in a six-span reinforced concrete continuous girder bridge.
A novel prioritization method for seismic retrofitting of bridges is presented by applying the probability-based seismic design of bridges to the prioritization of seismic retrofitting of bridges.The detailed identification process is provided.Based on the seismic fragility curves of bridges,the method can be used to identify the most damageable bridge components subjected to different seismic levels and the rank priority of retrofitting.Then the rational seismic retrofitting programs for bridges can be made.The superiority of the suggested method is shown by its application in a six-span reinforced concrete continuous girder bridge.
引文
[1]胡聿贤.地震工程学[M].第2版.北京:地震出版社,2006:150-173.
[2]Agrawal A,Ghosn M,Alampalli S,et al.Seismic fragility ofretrofitted multispan continuous steel bridges in New York[J].Journal of Bridge Engineering,2012,17(4):562-575.
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[4]Padgett J E,DesRoches R.Methodology for the develop-ment of analytical fragility curves for retrofitted bridges[J].Earthquake Engng Struct Dyn,2008,37:1157-1174.
[5]Nielson B G,DesRoches R.Analytical seismic fragilitycurves for typical bridges in the central and southeastern U-nited States[J].Earthquake Spectra,2007,23(3):615-633.
[6]Kim S H,Feng M Q.Fragility analysis of bridges underground motion with spatial variation[J].InternationalJournal of Non-linear Mechanics,2003,38:705-721.
[7]SEI/ASCE 7-02,Minimum design loads for buildings andother structures[S].
[8]Huang Q,Gardoni P,Hurlebaus S.Probabilistic seismic de-mand models and fragility estimates for reinforced concretehighway bridges with one single-column bent[J].J EngMech,2010,136(11):1340-1353.
[2]Agrawal A,Ghosn M,Alampalli S,et al.Seismic fragility ofretrofitted multispan continuous steel bridges in New York[J].Journal of Bridge Engineering,2012,17(4):562-575.
[3]Pan Y,Agrawal A K,Ghosn M,et al.Seismic fragility ofmultispan simply supported steel highway bridges in NewYork state.II:fragility analysis,fragility curves,and fragili-ty surfaces[J].Journal of Bridge Engineering,2010,15(5):462-472.
[4]Padgett J E,DesRoches R.Methodology for the develop-ment of analytical fragility curves for retrofitted bridges[J].Earthquake Engng Struct Dyn,2008,37:1157-1174.
[5]Nielson B G,DesRoches R.Analytical seismic fragilitycurves for typical bridges in the central and southeastern U-nited States[J].Earthquake Spectra,2007,23(3):615-633.
[6]Kim S H,Feng M Q.Fragility analysis of bridges underground motion with spatial variation[J].InternationalJournal of Non-linear Mechanics,2003,38:705-721.
[7]SEI/ASCE 7-02,Minimum design loads for buildings andother structures[S].
[8]Huang Q,Gardoni P,Hurlebaus S.Probabilistic seismic de-mand models and fragility estimates for reinforced concretehighway bridges with one single-column bent[J].J EngMech,2010,136(11):1340-1353.
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