›› 2017, Vol. 38 ›› Issue (4): 1114-1120.doi: 10.16285/j.rsm.2017.04.024

• 岩土工程研究 • 上一篇    下一篇

考虑土-结构相互作用效应和土质地基非线性的核岛厂房结构地震响应分析

尹训强1,金煜皓2,王桂萱1   

  1. 1. 大连大学 土木工程技术研究与开发中心,辽宁 大连 116622;2. 中国矿业大学 力学与建筑工程学院,江苏 徐州 221116
  • 收稿日期:2015-05-29 出版日期:2017-04-11 发布日期:2018-06-05
  • 通讯作者: 王桂萱,男,1960年生,博士,教授,主要从事大型工程结构抗震安全方面的研究工作。E-mail: tumuxinxi@163.com E-mail: lc-tm2008@163.com
  • 作者简介:尹训强,男,1986年生,博士,讲师,主要从事结构动力分析方面的研究工作。
  • 基金资助:

    辽宁省博士启动基金(No. 201601309);国家重大科技专项(No. 2011ZX06002-10);辽宁省教育厅一般项目(No. L2014498);大连大学优秀青年博士专项基金(No. 2015YBL010)资助课题。

Seismic response analysis of nuclear island buildings considering soil-structure interaction and nonlinear soil foundation

YIN Xun-qiang1, JIN Yu-hao2, WANG Gui-xuan1   

  1. 1. R&D Center of the Civil Engineering Technology, Dalian University, Dalian, Liaoning 116622, China; 2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
  • Received:2015-05-29 Online:2017-04-11 Published:2018-06-05
  • Supported by:

    This work was supported by the Doctoral Scientific Research Foundation of Liaoning Province (201601309), the National Grand Science and Technology Special Project of China (2011ZX06002-10), the General Project of Department of Education of Liaoning Province (L2014498) and the Outstanding Young Doctor Special Fund of Dalian University (2015YBL010).

摘要: 有效模拟土-结构相互作用(SSI)和土体非线性特征是进行土质地基条件下核岛厂房结构地震响应分析的关键技术问题。基于SuperFLUSH软件平台,采用等效线性法描述近场地基非线性动力特征,通过在地基有限区域设置黏性人工边界来模拟半无限地基辐射阻尼效应的影响,并利用一维有限元法进行自由场响应分析实现地震动的输入,从而建立土质地基条件核岛厂房结构地震响应分析计算模型。最后,以某土质地基条件下的CPR1000 堆型反应堆厂房的集中质量简化模型作为研究对象,开展考虑SSI效应和分层土质地基非线性对于核岛厂房结构地震响应特征影响研究,验证了该计算模型的精度和工程应用效果。研究表明:考虑SSI效应,可有效吸收散射波波动能量,减小结构响应;考虑土质地基非线性效应,加速度幅值在不同方向均有不同程度的降低,峰值频率明显的向低频偏移,因此,同时考虑SSI效应及土质地基的非线性特征,并将两者相结合的分析方法对核岛厂房结构抗震分析是必要的。

关键词: 黏性边界, SSI效应, 土质地基, 等效线性法, 核岛厂房地震响应

Abstract: The effective simulation of soil-structure interaction and the nonlinear characteristics of soil is a key technical problem for conducting a seismic response analysis of soil foundations on nuclear island. A one-dimensional finite element model of nuclear structure is established on the software platform of SuperFLUSH by simulating the radial damping through setting viscous artificial boundary in the limited area of foundation to analyze the response of free field to the ground motion input, then to describe the nonlinear dynamic characteristics in the near field ground using equivalent linear method. Furthermore a case study of a simplified lumped mass model for CPR1000 nuclear reactor in the soil foundation is investigated about the effect of SSI and nonlinear layered soil foundation on the seismic response characteristics of nuclear island building structure. Numerical results verify the reliability and applicability of the proposed model in engineering application. With the consideration of SSI effect, the model of viscous artificial boundary can effectively absorb the energy of scattered waves and reduce structural response. With the consideration of the nonlinear characteristics of soil, the acceleration amplitudes decrease to a certain extent in different directions, and the peak frequency shifts to low frequency. Based on above analysis, the combination of SSI and the nonlinear characteristics of soil is necessary for seismic analysis of nuclear island.

Key words: viscous boundary, effect of SSI, soil foundation, equivalent linear method, seismic response of nuclear island plant

中图分类号: 

  • TU 473.1

[1] 周兴涛,盛 谦,崔 臻,冷先伦,付晓东,马亚丽娜, . 颗粒离散单元法动力人工边界设置方法[J]. , 2018, 39(7): 2671-2680.
[2] 胡再强,王军星,刘兰兰,焦黎杰. 褥垫层作用下复合地基抗震性能有限元分析[J]. , 2008, 29(S1): 587-592.
[3] 邹德高 ,徐 斌 ,孔宪京 . 边界条件对土石坝地震反应的影响研究[J]. , 2008, 29(S1): 101-106.
[4] 陈健云 ,李 静 ,李建波 . 动力分析中无限地基两种近似方法的应用研究[J]. , 2006, 27(3): 373-377.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!