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

YIN Xun-qiang; JIN Yu-hao; WANG Gui-xuan

doi:10.16285/j.rsm.2017.04.024

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

更新时间：2026-06-25

- Seismic response analysis of nuclear island buildings considering soil-structure interaction and nonlinear soil foundation
- Vol. 38, Issue 4, Pages: 1114-1120(2017)
- 作者机构：
  
  1. 大连大学土木工程技术研究与开发中心
  2. 中国矿业大学力学与建筑工程学院
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.04.024
  CLC： TU311.3
- Published：2017
- 稿件说明：
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[1]尹训强,金煜皓,王桂萱.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[J].岩土力学,2017,38(04):1114-1120.

YIN Xun-qiang, JIN Yu-hao, WANG Gui-xuan. Seismic response analysis of nuclear island buildings considering soil-structure interaction and nonlinear soil foundation[J]. 2017, 38(4): 1114-1120.
[1]尹训强,金煜皓,王桂萱.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[J].岩土力学,2017,38(04):1114-1120. DOI： 10.16285/j.rsm.2017.04.024.

YIN Xun-qiang, JIN Yu-hao, WANG Gui-xuan. Seismic response analysis of nuclear island buildings considering soil-structure interaction and nonlinear soil foundation[J]. 2017, 38(4): 1114-1120. DOI： 10.16285/j.rsm.2017.04.024.

摘要

有效模拟土一结构相互作用（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。

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.

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