The Seismic Response Effect Analysis of Scaled Models of CAP1400 Nuclear Island Structure

作者：Li Xiaojun; Han Jie; Wang Xiaohui; He Qiumei

来源：震灾防御技术, 2017, 12(2).

DOI：10.11899/zzfy20170201

• Nuclear power plant
• Scaled model
• Numerical analysis
• Shaking table test
• Spectral acceleration

Aiming at the seismic response problem of CAP 1400 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.

• 单位
  北京; 中国地震局地球物理研究所; 北京工业大学