E2地震作用下减隔振桥梁的抗震设计
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摘要
以某减隔振桥梁为例,建立该桥的三维有限元模型,考虑桩-土相互作用的影响,并根据混凝土和钢筋的材料特性,选取适宜的动力弹塑性本构模型,同时模拟了弹塑性减隔振球型钢支座,并采用人工拟合的3条地震动时程曲线对该桥进行了E2地震作用下的弹塑性时程分析,验算该桥在E2地震作用下的强度及变形。经过详细的验算与分析,验证了本桥设计的安全性和可靠性,并为实际工程中的非规则桥梁在E2地震作用下的抗震验算提供参考依据。
Taking a bridge with vibration isolation device as an example,the 3D finite element model which considered the influence of pile-soil interaction was established.And then according to the material characteristic of concrete and steel bar,the proper dynamic elastic-plastic constitutive models were selected and the elastic–plastic spherical steel bearings with the function of seismic isolation were also simulated.Furthermore,by using three artificial seismic time-history waves,the elastic-plastic time-history analysis on this bridge under the action of E2 earthquake load was carried out to calculate the strength and deformation of this bridge.The results of detailed calculation and analysis prove that the bridge in this paper is designed safely and reliably.Also,the design for this bridge provides a reference for irregular bridge's seismic analysis under the action of E2 earthquake load.
Taking a bridge with vibration isolation device as an example,the 3D finite element model which considered the influence of pile-soil interaction was established.And then according to the material characteristic of concrete and steel bar,the proper dynamic elastic-plastic constitutive models were selected and the elastic–plastic spherical steel bearings with the function of seismic isolation were also simulated.Furthermore,by using three artificial seismic time-history waves,the elastic-plastic time-history analysis on this bridge under the action of E2 earthquake load was carried out to calculate the strength and deformation of this bridge.The results of detailed calculation and analysis prove that the bridge in this paper is designed safely and reliably.Also,the design for this bridge provides a reference for irregular bridge's seismic analysis under the action of E2 earthquake load.
引文
[1]叶爱君,管仲国.桥梁抗震[M].北京:人民交通出版社,2011.
[2]GB18306-2001,中国地震动参数区划图[S].
[3]GB50011-2010,建筑抗震设计规范[S].
[4]JTG/T B02—01—2008,公路桥梁抗震设计细则[S].
[5]禚一,李忠献,李宁.基于FENAP平台的钢筋混凝土桥墩非线性动力分析[J].天津大学学报,43(10):906-911.
[6]禚一.钢筋混凝土桥梁精细化建模及地震碰撞分析[D].天津:天津大学,2010,12.
[7]窦立军,杨柏坡,刘光和.土-结构动力相互作用几个实际应用问题[J].世界地震工程,1999,15(4):62-68.
[8]Wolf J P.Dynamic soil-structure interation[M].NewJersey:Pren-tice-Hall,1985.
[9]龚纬,戚冬艳.桩基础简化模型在桥梁抗震中的应用[J].铁道工程学报,2008,10:17-32.
[10]王开顺,王有为,李林友.土与结构相互作用地震反应研究及实用计算[J].建筑结构学报,1986,7(2):64-76.
[11]JTG D63—2007,公路桥涵地基与基础设计规范[S].
[12]Kent D C,Park R.Flexural members with confined concrete[J].Journal of the Structural Division,ASCE,1971,97(7):1969-1990.
[13]Menegotto M,Pinto P E.Slender RC Compressed Members in BiaxialBending[J].Journal of Structural Engineering,ASCE,1977,103(3):587-605.
[2]GB18306-2001,中国地震动参数区划图[S].
[3]GB50011-2010,建筑抗震设计规范[S].
[4]JTG/T B02—01—2008,公路桥梁抗震设计细则[S].
[5]禚一,李忠献,李宁.基于FENAP平台的钢筋混凝土桥墩非线性动力分析[J].天津大学学报,43(10):906-911.
[6]禚一.钢筋混凝土桥梁精细化建模及地震碰撞分析[D].天津:天津大学,2010,12.
[7]窦立军,杨柏坡,刘光和.土-结构动力相互作用几个实际应用问题[J].世界地震工程,1999,15(4):62-68.
[8]Wolf J P.Dynamic soil-structure interation[M].NewJersey:Pren-tice-Hall,1985.
[9]龚纬,戚冬艳.桩基础简化模型在桥梁抗震中的应用[J].铁道工程学报,2008,10:17-32.
[10]王开顺,王有为,李林友.土与结构相互作用地震反应研究及实用计算[J].建筑结构学报,1986,7(2):64-76.
[11]JTG D63—2007,公路桥涵地基与基础设计规范[S].
[12]Kent D C,Park R.Flexural members with confined concrete[J].Journal of the Structural Division,ASCE,1971,97(7):1969-1990.
[13]Menegotto M,Pinto P E.Slender RC Compressed Members in BiaxialBending[J].Journal of Structural Engineering,ASCE,1977,103(3):587-605.
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