土壤-结构相互作用下的TMSR-LF1厂房楼层反应谱分析  

Analysis of floor response spectra of TMSR-LF1 considering soil-structure interaction

作　　者：刘艺诚 王晓[1] 王晓艳[1] 樊辉青[1] 张小春[1] LIU Yicheng;WANG Xiao;WANG Xiaoyan;FAN Huiqing;ZHANG Xiaochun(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院大学,北京100049

出　　处：《核技术》2021年第7期83-90,共8页Nuclear Techniques

摘　　要：核反应堆厂房的楼层反应谱对整个反应堆系统的抗震分析与设计具有重要意义。本文旨在得到2 MW液态燃料钍基熔盐实验堆(Thorium Molten Salt Reactor-Liquid Fuel 1,TMSR-LF1)的准确楼层反应谱。采用ANSYS有限元分析软件建立梁、板壳、实体三种单元混合的三维有限元模型,通过直接法计算得到了土壤-结构相互作用(Soil-Structure Interaction,SSI)下的楼层反应谱。结果表明:地上部分的楼层反应谱谱值远大于地下部分,且因结构、荷载等因素差异较大;地面各楼层反应谱在竖直方向上的谱值均大于其水平方向的谱值。在开展核设施抗震设计时,建议增加地上楼层的垂向刚度。研究结果为TMSR-LF1的地震安全评估奠定了基础。[Background]The floor response spectra of the nuclear reactor building is of great significance to the seismic analysis and design of the whole reactor system.[Purpose]This study aims to get accurate floor response spectra of 2MW thorium molten salt reactor-liquid fuel 1(TMSR-LF1).[Methods]A three-dimensional finite element model coupling with beam,shell and solid was established by ANSYS finite element analysis(FEA)software.The results of floor response spectra considering the soil-structure interaction(SSI)effect were obtained by direct method.Finally,comparison analyses of different floors,different inputs and different damping ratios were carried out.[Results]The computation results show that the above-ground floor response spectra are much larger than that of the underground part,and the spectral values vary greatly due to the structure,load and other factors.The response spectra of each floor on the ground are larger in the vertical direction than in the horizontal direction.[Conclusions]In the seismic design of nuclear facilities,it is suggested to increase the vertical stiffness of the ground floor.The results of this study lay preliminary basis for seismic safety assessment of TMSR-LF1.

关 键 词：楼层反应谱 土壤-结构相互作用 核反应堆厂房结构 液态燃料钍基熔盐实验堆 

分 类 号：TL99[核科学技术—核技术及应用]