宁海新桥主桥抗震分析
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摘要
以宁海新桥特大桥主桥为例,采用Midas Civil有限元软件,对其进行了反应谱分析和非线性时程分析。针对其下部结构刚度较大的特点,提出了纵横向限位装置联合抗震支座的抗震设计方案。计算结果表明,E1地震作用下,桥梁基本处于弹性工作状态,E2地震作用下抗震支座非滑动方向发生屈服,通过侧向滑移摩擦消能后,桥墩水平地震力大大减小,而限位装置承担余下的水平地震力,同时防止落梁。纵横向限位装置联合抗震支座的抗震设计,适合本桥,也适合下部结构刚度较大的混凝土梁桥。
Spectrum analysis and time-history analysis for the main bridge of NingHai Bridge is done on the paper.Seismic restrainers and seismic bearings are applied to the main bridge of NingHai bridge for earthquake-resistance.According to the analysis,some conclusions are drawn as follows: firstly,the bridge works flexibly under earthquake action E1;secondly,seismic bearings will yield under earthquake action E2,and the bridge will be hold on by the seismic restrainers while sliding laterally;thirdly,the seismic responses of piers are much more reduced.Finally,seismic design such as seismic restrainers and seismic bearings is effective for the main bridge of NingHai bridge and other bridges with rigid piers.
Spectrum analysis and time-history analysis for the main bridge of NingHai Bridge is done on the paper.Seismic restrainers and seismic bearings are applied to the main bridge of NingHai bridge for earthquake-resistance.According to the analysis,some conclusions are drawn as follows: firstly,the bridge works flexibly under earthquake action E1;secondly,seismic bearings will yield under earthquake action E2,and the bridge will be hold on by the seismic restrainers while sliding laterally;thirdly,the seismic responses of piers are much more reduced.Finally,seismic design such as seismic restrainers and seismic bearings is effective for the main bridge of NingHai bridge and other bridges with rigid piers.
引文
[1]叶爱君,胡世德,范立础.大跨度桥梁抗震设计实用方法[J].土木工程学报,2001,34(1):1-6.
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[3]毕桂平,江涌.大型复杂立交工程中匝道桥抗震分析计算模型研究[J].桥梁建设,2003,(6):15-17.
[4]陈星烨,余钱华.大跨度桥梁的抗震分析与地震动输入[J].中外公路,2001,21(4):32-34.
[5]杨沪湘,许航.高烈度地震山区桥梁抗震设计研究[J].公路,2009,(8):246-250.
[6]宋晓东,李建中.山区桥梁的抗震概念设计[J].地震工程与工程振动,2004,24(1):92-96.
[7]滕军,吕海霞,吴红军,等.高墩小半径曲线梁桥抗震分析的若干问题探讨[J].工程抗震与加固改造,2008,30(5):55-60.
[8]周建春,刘光栋.大跨度公路梁桥抗震分析研究[J].桥梁建设,1998,28(1):5-9.
[9]刘光栋,周建春.大跨度公路梁桥抗震分析的若干研究进展[J].湖南大学学报,1996,23(5):105-112.
[10]JTG/T B02—01—2008,公路桥梁抗震设计细则[S].
[11]JTJ004—89,公路工程看着设计规范[S].
[2]马健中.高墩桥梁抗震分析方法[J].公路交通科技,2004,21(12):66-68.
[3]毕桂平,江涌.大型复杂立交工程中匝道桥抗震分析计算模型研究[J].桥梁建设,2003,(6):15-17.
[4]陈星烨,余钱华.大跨度桥梁的抗震分析与地震动输入[J].中外公路,2001,21(4):32-34.
[5]杨沪湘,许航.高烈度地震山区桥梁抗震设计研究[J].公路,2009,(8):246-250.
[6]宋晓东,李建中.山区桥梁的抗震概念设计[J].地震工程与工程振动,2004,24(1):92-96.
[7]滕军,吕海霞,吴红军,等.高墩小半径曲线梁桥抗震分析的若干问题探讨[J].工程抗震与加固改造,2008,30(5):55-60.
[8]周建春,刘光栋.大跨度公路梁桥抗震分析研究[J].桥梁建设,1998,28(1):5-9.
[9]刘光栋,周建春.大跨度公路梁桥抗震分析的若干研究进展[J].湖南大学学报,1996,23(5):105-112.
[10]JTG/T B02—01—2008,公路桥梁抗震设计细则[S].
[11]JTJ004—89,公路工程看着设计规范[S].
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