近断层脉冲型地震下桥梁基础减隔震支座减震性能研究

详细信息    查看全文 | 推荐本文 |

英文篇名：Research on Seismic Reduction Performance of Bridge Foundation Seismic Isolation Bearing under Near-fault Pulsed Ground Motion 作者：崔海军 英文作者：CUI Hai-jun;Yangzhou Polytechnic Institute; 关键词：近断层 ; 脉冲型地震动 ; 减隔震支座 ; 地震响应 ; 位移 ; 墩底弯矩 英文关键词：Near-fault;;Pulsed ground motion;;Seismic isolation bearing;;Seismic response;;Displacement;;Pier bottom bending moment 中文刊名：XBJT 英文刊名：Western China Communications Science & Technology 机构：扬州工业职业技术学院; 出版日期：2019-03-15 出版单位：西部交通科技 年：2019 期：No.140 基金：扬州市科技局扬州市重点研发计划(社会发展)项目“多点地震激励桥梁基础减隔震支座性能研究”(YZ2016068);; 扬州工业职业技术学院“校级‘青蓝工程’中青年学术带头人培养对象”资助项目研究成果 语种：中文; 页：XBJT201903017 页数：4 CN：03 ISSN：45-1339/U 分类号：66-69

摘要

文章为研究近断层脉冲型地震动下桥梁基础减隔震支座的减震性能,设计一种桥梁基础减隔震支座,在选取近断层脉冲型地震动和非脉冲型地震动下进行地震响应分析。结果表明:在脉冲型地震动激励下,支座及梁端位移响应大于非脉冲型地震动下位移响应,近断层区域桥梁抗震设计时应将脉冲型地震动效应作为重点设计;在近断层脉冲型地震动作用下,设计桥梁基础减隔震支座能够较大幅降低桥墩基础底部的弯矩内力效应,起到有效的减隔震效果。
        In order to study the seismic reduction performance of bridge foundation seismic isolation bearing under near-fault pulsed ground motion,this article designs a bridge foundation seismic isolation bearing,and conducts the seismic response analysis on selected near-fault pulse ground motion and non-pulsed ground motion.The results show that,under the excitation of pulsed ground motion,the displacement response of the bearing and beam end is greater than that of the non-pulsed ground motion,thus the bridge seismic design for the near-fault region should focus on the pulsed ground motion effect;under the action of near-fault pulsed ground motion,the design of bridge foundation seismic isolation bearing can greatly reduce the internal force effect of bending moment at the bottom of bridge pier foundation,and thus effectively reduce the seismic isolation effect.

引文

[1]薛栋杨.近断层地震作用下高速铁路桥梁抗震性能分析[D].北京:北京交通大学,2018.
    [2]郑史熊,陈志强,陈志伟,等.近场多脉冲地震作用下高墩桥梁地震相应分析[J/OL].西南交通大学学报,2018,53(5).
    [3]常志旺.近场脉冲型地震动的量化识别及特性研究[D].哈尔滨:哈尔滨工业大学,2014.
    [4]Iervolino I,Cornell C A.Probability of Occurrence of Velocity Pulses in Near-Source Ground Motions[J].Bulletin of the Seismological Society of America,2008,98(5):2 262-2 277.
    [5]Baker J W.Quantitative Classification of Near-Fault Ground Motions Using Wavelet Analysis[J].Bulletin of the Seismological Society of America,2007,97(97):1 486-1 501.
    [6]陈志伟,陈志强,李晰.近断层脉冲效应对高墩桥梁地震响应的影响[J].铁道建筑,2018,58(8):39-42.
    [7]何林焜.跨越活动断层铁路桥梁地震反应分析[D].兰州:兰州交通大学,2016.
    [8]崔海军.地震激励桥梁基础减隔震支座性能研究[J].公路工程,2018,43(6):112-116.