摘要
为探讨群桩基础对自复位高墩地震反应的影响,本文给出了群桩基础的有限元模拟方法。基于Open Sees平台建立了考虑群桩基础的自复位高墩有限元模型,输入3条强震记录,进行了考虑群桩基础的自复位高墩地震反应分析,并与不考虑群桩基础的自复位高墩地震反应进行了比较。结果表明:群桩基础改变了自复位桥墩的提离位移、桥墩刚体转动及桥墩弹性变形引起的墩顶水平位移反应量值,群桩基础对自复位高墩的墩顶水平位移反应量值有影响。群桩基础对自复位高墩的墩底弯矩反应量值有影响,总体上看,考虑群桩基础会减小墩底弯矩。忽略群桩基础的影响时,对设计来说偏于安全。
This paper proposes a finite element simulation method considering group pile foundation to investigate the influence of group pile foundation on the seismic response of a self-centering tall pier.The analysis model for the seismic response of the self-centering tall pier was established based on Open Sees program package,which considers the influence of group pile foundation.Three strong earthquake records were selected as seismic motion inputs.The seismic response of the self-centering tall pier with group piles was performed.Compared with the seismic response of self-centering tarr piers not considering pile group foundation,the pile group foundation has changed the uplift displacement of the self-centering tall pier,and the displacement response of the pier top was caused by the rigid body rotation and elastic deformation of the pier.Pile group foundation affects the horizontal displacement response value of pier top of self-centering tall piers.Pile group foundation also influences the moment response value of bottom pier of self-centering tall piers.Considering the influence of pile group foundation,the moment of pier bottom will be reduced as a whole.It is safe for design when neglecting the influence of pile group foundation.
作者
刘苗
夏修身
LIU Miao;XIA Xiushen(School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2019年第12期2000-2004,共5页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51668035,51368033)
中国铁路总公司科技研究开发计划(2005G002-B)
关键词
桥梁工程
高墩
自复位
地震
群桩基础
提离
bridge engineering
tall pier
self-centering
earthquake
group plie foundation
uplift
