Seismic Response of Base-isolated Nuclear Containment and Optimization for the Number of Isolation Bearings Considering Soil-Structure Interaction

PENG Qiyu

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Seismic Response of Base-isolated Nuclear Containment and Optimization for the Number of Isolation Bearings Considering Soil-Structure Interaction

更新时间：2025-09-25

- Seismic Response of Base-isolated Nuclear Containment and Optimization for the Number of Isolation Bearings Considering Soil-Structure Interaction
- Issue 3, Pages: 372-379(2020)
- 作者机构：
  
  中山大学工学院,广东,广州,510006
- 作者简介：
- 基金信息：
- DOI：
  CLC： P315.9;TL364;TU311.3
- Published：2020
- 稿件说明：
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彭齐驭,刘玉岚,王彪.考虑土⁃结构相互作用的安全壳隔震与支座数量优化∗[J].防灾减灾工程学报,2020,(3):372-379

PENG Qiyu. Seismic Response of Base-isolated Nuclear Containment and Optimization for the Number of Isolation Bearings Considering Soil-Structure Interaction[J]. 2020, (3): 372-379.
彭齐驭,刘玉岚,王彪.考虑土⁃结构相互作用的安全壳隔震与支座数量优化∗[J].防灾减灾工程学报,2020,(3):372-379 DOI：

PENG Qiyu. Seismic Response of Base-isolated Nuclear Containment and Optimization for the Number of Isolation Bearings Considering Soil-Structure Interaction[J]. 2020, (3): 372-379. DOI：

摘要

为了探究土?结构相互作用（SSI）对隔震的核电站安全壳在地震作用下隔震效果的影响，以及在此基础上对隔震支座数量设置的优化，选取CPR1000建立三维有限元模型，采用0.4g的LBNS地震波作用，通过ABAQUS有限元分析软件模拟计算在不同情况下

考虑SSI效应、不考虑SSI效应、隔震、非隔震，以及不同数量设置的铅芯橡胶隔震支座下的安全壳的地震加速度、位移响应。结果表明，对于非隔震安全壳，考虑SSI效应后最大加速度响应下降44.39%，最大位移响应增大了27.03%;而对于隔震结构，SSI效应影响相对较小，最大加速度及位移响应的变化分别为3.17%和10.73%。但在考虑位移响应下，SSI效应仍不可忽视。随着隔震支座设置数量增大，隔震层的刚度和阻尼增大，在考虑SSI效应下，安全壳的最大加速度响应近线性缓慢增大。而最大位移响应在数量100~300阶段迅速减小，在数量300~600阶段减速则趋于平缓。在数量达到300后，继续增加数量位移减小效果不明显，而加速度将有所增加。因此选取300作为较优的隔震支座数量设置。

Abstract

This paper aims to analyze the behavior of the isolated containment vessel for the nuclear power plant under earthquake considering soil-structure interaction (SSI) and to optimize the number of isolation bearings. Therefore

a three-dimensional finite element model is established for CPR1000

and ABAQUS is used to simulate the seismic acceleration and displacement response under the LBNS seismic wave. The simulation conditions are: analysis with and without SSI

isolated and non-isolated structure

and different number of lead rubber bearings. For non-isolated containment

after considering the SSI effect

the maximum acceleration response decreases by 44.39%

and the maximum displacement response increases by 27.03%. For the isolated structure

the influence of SSI effect is relatively small

and the changes in maximum acceleration and displacement response are 3.17% and 10.73%

respectively. However

the SSI effect cannot be ignored when considering the displacement response. With the increase in the number of isolation bearings

the stiffness and damping of the isolation layer increases. As a result

the maximum acceleration response of the containment increases linearly. The maximum displacement response declines rapidly when the number of bearings decreases from 100 to 300. Then it slows down when the number rises above 300. That means the decrease of displacement response is not obvious at this stage

while the acceleration response will increase. Therefore

300 is relatively the optimal number for isolation bearings.

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references

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