近断层地震动竖向分量对连续刚构桥受力影响分析
详细信息 查看官网全文
- 英文论文题名：Influence of Vertical Component of Near-Fault Ground Motion on the Continuous Rigid Frame Bridge
- 论文作者：刘鹏 ; 陈克坚 ; 曾永平 ; 杨国静
- 英文论文作者：Liu Peng ; Chen Kejian ; Zeng Yongping ; Yang Guojing ; China Railway Eryuan Engineering Group Co. ; Ltd. ; School of Civil Engineering ; Southwest Jiaotong University
- 年：2016
- 作者机构：中铁二院工程集团有限责任公司;西南交通大学土木工程学院;
- 论文关键词：近断层地震动 ; 竖向地震动 ; 连续刚构桥 ; 纤维单元
- 英文论文关键词：near-fault ground motion ; vertical ground motion ; continuous rigid frame bridge ; fiber element
- 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：U441;U448.23
- 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：7
- 文件大小：509k
- 原文格式：O
- 会议级别：全国
摘要
较大的竖向地震动是近断层地震动的一个明显特征,而规范对竖向地震动加速度峰值的规定对此考虑不充分,因此开展竖向地震动对近断层连续刚构桥影响的研究十分必要。本文以一座连续刚构桥为例,研究了竖向地震动加速度峰值与水平地震动加速度峰值之比分别为0.5、1.0、1.5、2.0、3.0五种情况时,结构的地震响应和桥墩损伤情况。从计算结果可以看出,在竖向加速度峰值较大时,梁体跨中呈现出一定的几何非线性,且梁体跨中截面内力增加明显,边支座出现较大上拔力,桥墩可能出现轴向拉力,桥墩损伤情况随着地震动竖向加速度峰值与水平向加速度峰值之比的增大也有增加的趋势,这在进行设计时均需引起足够的重视。
An obvious characteristics of near-fault ground motion is may appear large vertical ground motion.However,the situation does not to be considered in the specification.So it is necessary to study the influence of the large vertical vibration on the continuous rigid frame bridge.Based on a continuous rigid frame bridge as an example,this paper studied influence of the vertical and horizontal ground motion acceleration peak value ratio(0.5,1.0,1.5,2.0,and 1.5)on the bridge.The results show that across the beam body presents a certain geometric nonlinearity,and across the section internal force of the beam increases obviously.The side bearings appear large pulling force and pier may arise axial tension when the vertical acceleration peak value is large.And,the damage of piers is also an increasing trend with the ratio increasing.These issues required enough attention in the design.
An obvious characteristics of near-fault ground motion is may appear large vertical ground motion.However,the situation does not to be considered in the specification.So it is necessary to study the influence of the large vertical vibration on the continuous rigid frame bridge.Based on a continuous rigid frame bridge as an example,this paper studied influence of the vertical and horizontal ground motion acceleration peak value ratio(0.5,1.0,1.5,2.0,and 1.5)on the bridge.The results show that across the beam body presents a certain geometric nonlinearity,and across the section internal force of the beam increases obviously.The side bearings appear large pulling force and pier may arise axial tension when the vertical acceleration peak value is large.And,the damage of piers is also an increasing trend with the ratio increasing.These issues required enough attention in the design.
引文
[1]UBC97,International Council of Building Officials(ICBO).Uniform building codes[S].1997,Whittier CA.
[2]中华人民共和国国家标准.GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011—2010 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press.2010.
[3]中华人民共和国行业标准.JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.JTG/TB 02-01—2008 Guidelines for seismic design of highway bridges[S].Beijing:China Communications Press,2008.
[4]中华人民共和国国家标准.GB 50111—2006铁路工程抗震设计规范[S].北京:中国计划出版社,2009.GB 50111—2006 Code for seismic design of railway engineering[S].Beijing:China Planning Press,2009.
[5]胡聿贤.地震工程学[M].北京:地震出版社,1988.Hu Yuxian.Earthquake engineering[M].Beijing:Seismological Press,1988.
[6]李新乐,窦慧娟,彭永恒等.基于近断层地震的桥梁结构抗震设计研究进展[J].大连民族学院学报,2007,03:57-59.Li Xinle,Dou Huijuan,Peng Yongheng,etc.Research development on seismic design for bridge structure under near-fault earthquake[J].Journal of Dalian Nationalities Universit,2007,03:57-59.
[7]贾俊峰,欧进萍.近断层竖向地震动峰值特征[J].地震工程与工程振动,2009,29(1):44-49.Jia Junfeng,Ou Jinping.Peak amplitude characteristics of vertical seismic ground motions in near-fault regions[J].Journal Of Earthquake Engineering and Engineering Vibration,2009,29(1):44-49.
[8]谢俊举,温增平,高孟潭等.2008年汶川地震近断层竖向与水平向地震动特征[J].地球物理学报,2010,53(8):796-805.Xie Junju,Wen Zengping,Gao Mengtan,etc.Characteristics of near-fault vertical and horizontal ground motion from the2008 Wenchuan earthquake[J].Chinese Journal of Geophsics,2010,53(8):796-805.
[2]中华人民共和国国家标准.GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011—2010 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press.2010.
[3]中华人民共和国行业标准.JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.JTG/TB 02-01—2008 Guidelines for seismic design of highway bridges[S].Beijing:China Communications Press,2008.
[4]中华人民共和国国家标准.GB 50111—2006铁路工程抗震设计规范[S].北京:中国计划出版社,2009.GB 50111—2006 Code for seismic design of railway engineering[S].Beijing:China Planning Press,2009.
[5]胡聿贤.地震工程学[M].北京:地震出版社,1988.Hu Yuxian.Earthquake engineering[M].Beijing:Seismological Press,1988.
[6]李新乐,窦慧娟,彭永恒等.基于近断层地震的桥梁结构抗震设计研究进展[J].大连民族学院学报,2007,03:57-59.Li Xinle,Dou Huijuan,Peng Yongheng,etc.Research development on seismic design for bridge structure under near-fault earthquake[J].Journal of Dalian Nationalities Universit,2007,03:57-59.
[7]贾俊峰,欧进萍.近断层竖向地震动峰值特征[J].地震工程与工程振动,2009,29(1):44-49.Jia Junfeng,Ou Jinping.Peak amplitude characteristics of vertical seismic ground motions in near-fault regions[J].Journal Of Earthquake Engineering and Engineering Vibration,2009,29(1):44-49.
[8]谢俊举,温增平,高孟潭等.2008年汶川地震近断层竖向与水平向地震动特征[J].地球物理学报,2010,53(8):796-805.Xie Junju,Wen Zengping,Gao Mengtan,etc.Characteristics of near-fault vertical and horizontal ground motion from the2008 Wenchuan earthquake[J].Chinese Journal of Geophsics,2010,53(8):796-805.