高墩大跨铁路连续梁桥桥墩地震易损性分析
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- 英文论文题名：Seismic Vulnerability Analysis of Railway High-Pier and Long-Span Continuous Beam Bridges
- 论文作者：杨国静
- 英文论文作者：Yang Guojing ; China Railway Eryuan Engineering Group Co. ; Ltd.
- 年：2016
- 作者机构：中铁二院工程集团有限责任公司;
- 论文关键词：连续梁 ; 高墩 ; 地震易损性 ; 球型钢支座 ; 双曲面球型减隔震支座
- 英文论文关键词：continuous beam ; high pier ; seismic vulnerability ; steel spherical bearings ; double spherical aseismic bearings
- 会议召开时间：2016-10-14
- 会议录名称：“川藏铁路建设的挑战与对策”2016学术交流会论文集
- 语种：中文
- 分类号：U442.55
- 学会代码：ZGTD
- 会议名称：“川藏铁路建设的挑战与对策”2016学术交流会
- 会议地点：中国四川成都
- 主办单位：中国铁道学会、中国铁道学会工程分会、中国中铁股份有限公司、中铁二院工程集团有限责任公司
- 学会名称：中国铁道学会
- 页数：9
- 文件大小：719k
- 原文格式：O
- 会议级别：全国
摘要
随着西部铁路建设的快速发展,为了满足线路跨越陡峭峡谷等的需求,一大批高墩大跨桥梁相继出现。本文以川藏铁路某一高墩大跨连续梁桥为研究对象,利用概率性地震需求分析模型分别对隔震与非隔震连续梁桥进行了地震易损性分析。在考虑桥梁结构与地震动参数随机性的基础上,以位移延性比作为损伤指标,采用传统可靠度概率分析方法生成了各墩柱的易损性曲线,对比分析了隔震与非隔震桥梁墩柱在不同破坏状态下的超越概率。结果表明:从易损性的角度分析,相比于非隔震连续梁桥,隔震连续梁桥在地震动作用下表现出了较好的抗震性能。采用减隔震支座后,制动墩易损性降低,其他三个非制动墩易损性略有增加,但制动墩的易损性依然是最大的。表明双曲面球型减隔震支座可使四个桥墩构件更均匀地承受地震力,有效减低了最不利制动墩的破坏概率,起到了很好的减隔震作用。
With the rapid development of the western railway construction,in order to meet the demands of crossing steep canyons and etc.,a large number of high-pier long-span bridges have appeared.In this paper,based on a common high-pier long-span continuous beam bridge on Sichuan-Tibet railway,the seismic vulnerability analysis of the isolated and non-isolated continuous beam bridge are developed by using probabilistic seismic demand models.Considering the randomness of bridge structure and ground motion parameters,the vulnerability curves of each pier are generated by the use of the traditional reliability probability method with the displacement ductility ratio as damage index and the exceeding probability of piers in isolated and non-isolated bridge under different damage states is analyzed.The result shows that compared with the non-isolated bridge,the isolated bridge show better anti-seismic performance under the earthquake from the point of view of vulnerability.For the isolated bridge with double spherical aseismic bearings,the vulnerability of brake pier is reduced and the vulnerability of other three non-braking piers is increased slightly.However,the exceeding probability of the brake pier remains the highest.All show that double spherical aseismic bearing can make four piers member to withstand seismic forces more evenly and effectively reduce the failure probability of the most adverse pier,which play a very good role in reducing isolation.
With the rapid development of the western railway construction,in order to meet the demands of crossing steep canyons and etc.,a large number of high-pier long-span bridges have appeared.In this paper,based on a common high-pier long-span continuous beam bridge on Sichuan-Tibet railway,the seismic vulnerability analysis of the isolated and non-isolated continuous beam bridge are developed by using probabilistic seismic demand models.Considering the randomness of bridge structure and ground motion parameters,the vulnerability curves of each pier are generated by the use of the traditional reliability probability method with the displacement ductility ratio as damage index and the exceeding probability of piers in isolated and non-isolated bridge under different damage states is analyzed.The result shows that compared with the non-isolated bridge,the isolated bridge show better anti-seismic performance under the earthquake from the point of view of vulnerability.For the isolated bridge with double spherical aseismic bearings,the vulnerability of brake pier is reduced and the vulnerability of other three non-braking piers is increased slightly.However,the exceeding probability of the brake pier remains the highest.All show that double spherical aseismic bearing can make four piers member to withstand seismic forces more evenly and effectively reduce the failure probability of the most adverse pier,which play a very good role in reducing isolation.
引文
[1]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.Gu Yin,Huang Yijun,Zhuo Weidong.Study on seismic vulnerability of long span continuous rigid frame bridge with high piers[J].Journalof Earthquake Engineering and Engineering Vibration,2011,31(2):91-97.
[2]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.Feng Jie.The research of seismic vulnerability analysis obridge structure[D].Chengdu:Southwest Jiaotong Univer-sity,2010.
[3]张菊辉.基于数值模拟的规则梁桥墩柱的地震易损性分析[D].上海:同济大学,2006.Zhang Juhui.Analysis on the Seismic Vulnerability of Regular Beam Bridge Piers Based on Numerical Simulation[D].Shanghai:TongjiUniversity,2006.
[4]Howard Hwang,Liu JingBo,Chiu Yi-Huei.Seismic fragility analysis of highway bridges[R].Mid-America Earthquake Center Technical Re-port,MAEC-RR-4 Project,2001.
[5]彭小波.汶川地震强震动记录分析及应用[D].中国地震局工程力学研究所,2011.Peng Xiaobo.Analysis of strong motion recordings and its application from Wenchuan Earthquake[D].Institute of Engineering Mechanics,China Earthquake Adminstration,2011.
[6]李建中,宋晓东,范立础.桥梁高墩位移延性能力的探讨[J].地震工程与工程振动,2005,25(1):40-48.Li Jianzhong,Song Xiaodong,Fan Lichu.Investigation for displacement ductility capacity of tall piers[J].Journal of Earthquake Engineeringand Engineering Vibration,2005,25(1):40-48.
[7]Silvia Mazzoni,Frank Mckenna,Michael H.Open system for earthquake engineering simulation user manual[M].Pacific Earthquake Engineering Research Center,University of California,Berkeley,2005.
[8]Cornell C A.Bounds on the reliability of structural system[J].Journal of Structure Division,ASCE,1967,93(ST1):171-200.
[2]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.Feng Jie.The research of seismic vulnerability analysis obridge structure[D].Chengdu:Southwest Jiaotong Univer-sity,2010.
[3]张菊辉.基于数值模拟的规则梁桥墩柱的地震易损性分析[D].上海:同济大学,2006.Zhang Juhui.Analysis on the Seismic Vulnerability of Regular Beam Bridge Piers Based on Numerical Simulation[D].Shanghai:TongjiUniversity,2006.
[4]Howard Hwang,Liu JingBo,Chiu Yi-Huei.Seismic fragility analysis of highway bridges[R].Mid-America Earthquake Center Technical Re-port,MAEC-RR-4 Project,2001.
[5]彭小波.汶川地震强震动记录分析及应用[D].中国地震局工程力学研究所,2011.Peng Xiaobo.Analysis of strong motion recordings and its application from Wenchuan Earthquake[D].Institute of Engineering Mechanics,China Earthquake Adminstration,2011.
[6]李建中,宋晓东,范立础.桥梁高墩位移延性能力的探讨[J].地震工程与工程振动,2005,25(1):40-48.Li Jianzhong,Song Xiaodong,Fan Lichu.Investigation for displacement ductility capacity of tall piers[J].Journal of Earthquake Engineeringand Engineering Vibration,2005,25(1):40-48.
[7]Silvia Mazzoni,Frank Mckenna,Michael H.Open system for earthquake engineering simulation user manual[M].Pacific Earthquake Engineering Research Center,University of California,Berkeley,2005.
[8]Cornell C A.Bounds on the reliability of structural system[J].Journal of Structure Division,ASCE,1967,93(ST1):171-200.