高墩大跨连续刚构桥抗震性能研究
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摘要
用设有多个塑性铰的全桥计算模型研究了连续刚构桥的抗震性能,并与类似的连续梁桥作了比较。结果表明连续刚构桥在高烈度地震区所受的地震损伤仍很小,抗震性能明显高于类似的连续梁桥;刚构墩出现塑性后,与弹性的相比墩底的地震力明显减小,随着地震动强度的增加减小的幅度增大,但墩顶位移变化很小。
The seismic performance of tall-pier and long-span continuous rigid-framed bridge is studied by using the genreal analysis model with multi-plastic hinges,and compared with the similar continuous beam bridge.It is founded that the continuous rigid-framed bridge only suffers damage slightly in strong ground motions,and the earthquake resistant capability of this bridge is obviously more excellent than that of the continuous beam bridge.Compared with the elastic seismic response,seismic force at the base pier is significantly reduced when plastic hinges are formed in major pier.In addition,the seismic force is greatly reduced along with intensity of ground motion increasing,but increase of displacement at the pier top is not evident.
The seismic performance of tall-pier and long-span continuous rigid-framed bridge is studied by using the genreal analysis model with multi-plastic hinges,and compared with the similar continuous beam bridge.It is founded that the continuous rigid-framed bridge only suffers damage slightly in strong ground motions,and the earthquake resistant capability of this bridge is obviously more excellent than that of the continuous beam bridge.Compared with the elastic seismic response,seismic force at the base pier is significantly reduced when plastic hinges are formed in major pier.In addition,the seismic force is greatly reduced along with intensity of ground motion increasing,but increase of displacement at the pier top is not evident.
引文
[1]马保林.高墩大跨连续刚构桥[M].北京:人民交通出版社,2001.
[2]郑凯锋,文曙东,栗怀广.弹塑性连接梁在双薄壁高墩连续刚构桥中的应用[J].西北地震学报,2007,29(4):303-306.
[3]Eurocode 8-Design provisions for earthquake resistance ofStructures-Part 2:Bridges[S].1998-2005.
[4]陈星烨,颜东煌,刘文浩.某连续刚构梁桥的弹塑性抗震性能分析[J].中外公路2008,28(3):75-81.
[5]陈海波,刘保东.大跨度高墩连续刚构桥空间地震响应分析[J].工程抗震与加固改造,2005,27(3):78v80.
[6]王常峰,陈兴冲,夏修身.高墩大跨连续刚构桥抗震设计参数优化[J].公路交通科技,2006,23(4):80-83.
[7]夏修身,陈兴冲,王常峰.铁路高墩弹塑性地震反应分析[J].世界地震工程,2008,24(2):117-121.
[8]王东升,冯启民,凌贤长,等.桥梁非线性地震反应分析若干问题研究现状[J].地震工程与工程振动.2002,22(1):61-63.
[9]日本铁道综合技术研究所,铁道构造物等设计标准及解说V抗震设计[S].日本:丸善株式会社,2000.
[2]郑凯锋,文曙东,栗怀广.弹塑性连接梁在双薄壁高墩连续刚构桥中的应用[J].西北地震学报,2007,29(4):303-306.
[3]Eurocode 8-Design provisions for earthquake resistance ofStructures-Part 2:Bridges[S].1998-2005.
[4]陈星烨,颜东煌,刘文浩.某连续刚构梁桥的弹塑性抗震性能分析[J].中外公路2008,28(3):75-81.
[5]陈海波,刘保东.大跨度高墩连续刚构桥空间地震响应分析[J].工程抗震与加固改造,2005,27(3):78v80.
[6]王常峰,陈兴冲,夏修身.高墩大跨连续刚构桥抗震设计参数优化[J].公路交通科技,2006,23(4):80-83.
[7]夏修身,陈兴冲,王常峰.铁路高墩弹塑性地震反应分析[J].世界地震工程,2008,24(2):117-121.
[8]王东升,冯启民,凌贤长,等.桥梁非线性地震反应分析若干问题研究现状[J].地震工程与工程振动.2002,22(1):61-63.
[9]日本铁道综合技术研究所,铁道构造物等设计标准及解说V抗震设计[S].日本:丸善株式会社,2000.
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