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  李小军,韩杰,王晓辉,贺秋梅.CAP1400核岛结构缩尺模型对地震反应影响分析[J].震灾防御技术,2017,12(2):241-253, DOI:10.11899/zzfy20170201.

CAP1400核岛结构缩尺模型对地震反应影响分析
摘要:    针对核电厂CAP1400核岛结构地震反应问题,构建了核岛屏蔽厂房和辅助厂房整体结构的3个分析模型:原型和1/16、1/40缩尺模型,并在AP000谱和RG1.60谱地震动输入下进行了有限元模拟对比分析,探讨了振动台试验模型缩尺处理的合理性和精确性。研究表明,基于缩尺模型得到的结构自振频率相对于原型结构模型有所降低,降低幅度在8.5%以内;结构模型的缩尺对结构反应峰值加速度和高频(大于3Hz)加速度反应谱的影响较为显著,但对较低频(小于3Hz)的加速度反应谱影响较小;模型缩尺对结构不同方向反应的影响中,刚度越大的方向其影响越大。进一步将结构模型数值模拟结果与1/16缩尺模型的振动台试验结果进行了比较分析,试验给出的结构自振频率远低于模型数值模拟结果,但原型和1/16缩尺模型数值模拟得到的结构反应均与试验结果较为接近。基于模型数值模拟和振动台试验研究,认为对于缩尺比1/16或更大的模型可以忽略模型的缩尺效应。
作者单位
李小军 北京工业大学建筑工程学院, 北京 100124;中国地震局地球物理研究所, 北京 100081 
韩杰 北京工业大学建筑工程学院, 北京 100124 
王晓辉 北京工业大学建筑工程学院, 北京 100124 
贺秋梅 中国地震局地球物理研究所, 北京 100081 
关  键  词:核电厂  缩尺模型  数值模拟  振动台试验  加速度反应谱
DOI:10.11899/zzfy20170201
基金项目:国家自然科学基金资助项目(51408255、51421005),国家科技重大专项资助项目(2013ZX06002001)
收稿日期:2017-04-28
作者简介:李小军,男,生于1965年。教授,博士,博导。主要从事地震工程等研究。E-mail:mailto:beerli@vip.sina.com
通讯作者:
The Seismic Response Effect Analysis of Scaled Models of CAP1400 Nuclear Island Structure
Abstract:      Aiming at the seismic response problem of CAP1400 nuclear island structure of the nuclear power plant 3 analytical models, prototype and 1/16, 1/40 scale models, were constructed for the whole structure of the shielding and auxiliary factory, and comparative analysis of the seismic responses of the 3 models was done by finite element method under the ground motions matching AP000 spectrum and the RG1.60 spectrum, the rationality and accuracy were discussed on the scaled model for the shaking table testing. The research shown that natural frequencies of structure response from scaled models are smaller than that produced in the prototype structure model, the reduction was within 8.5%; the effect of scaled models is obviously on the peak acceleration and high frequency (more than 3Hz) spectral accelerations of structure response, but less on the low frequency (less than 3Hz) spectral accelerations; the effect of scaled model on the structure response is larger in direction of larger stiffness. In addition, the contrastive analysis between numerical simulation of different scale models and a shaking table testing of 1/16 scale model was carried out, which indicates that the natural frequencies from the shaking table testing is far lower than those from numerical simulation, but the simulated structure responses of the prototype and 1/16 scale models and the test results of 1/16 scale model were relatively close. The study reveals that scale effect of analysis and testing models can be ignored for scaled models of 1/16 or greater.
Keywords:  Nuclear power plant  Scaled model  Numerical analysis  Shaking table test  Spectral acceleration
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