Elasto-plastic response analysis of nuclear containment vessel structures under strong earthquakes

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Xue, Zhicheng^1 ; Zhang, Yao^1 ; Pei, Qiang^2 ; Zhu, Kongchen^1 ; Yan, Ziran^1

School of Architecture and Civil Engineering, Heilongjiang University of Science and Technology, Harbin, China^1

RandD Center of Civil Engineering Technology, Dalian University, Dalian, China^2

关键词: Acceleration response;    Amplification effects;    Displacement response;    Earthquake resistant;    Elasto-plastic analysis;    Elasto-plastic response;    Reinforcement measures;    Three dimensional finite element model;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/3/032029/pdf
DOI  :  10.1088/1755-1315/189/3/032029

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

In order to ensure the earthquake-resistant safety of NPPs and avoid major equipment damage and damage of nuclear leakage, an elasto-plastic response analysis of the nuclear containment vessel structure is required to evaluate its seismic performance under strong earthquakes. Taking the CNP1000 nuclear containment vessel structure as the research object, the finite element software ABAQUS is used to establish a three-dimensional finite element model. Based on the dynamic elasto-plastic analysis theory, the influence of different earthquake intensity on the seismic response of the structure is analyzed. Through the displacement response, acceleration response and stress distribution of the structure, the characteristics of the seismic performance of the containment vessel are analyzed to obtain the structural response rules and structural damage links. The results show: the structure has an amplification effect on the acceleration response, and the amplification effect becomes more significant with the increase of the height; the structural weaknesses are the bottom of the cylinder and the vicinity of the equipment hole, and corresponding reinforcement measures should be added to improve the overall seismic performance of the structure.