Seismic performance analysis of base-isolated nuclear island building in nonrocky soils

被引：0
作者：
Liu, Yu [1 ,2 ]
Li, Jianbo [1 ,2 ]
Ding, Zhixin [3 ]
Lin, Gao [1 ,2 ]
机构：
[1] State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian
[2] Institute of Earthquake Engineering, School of Infrastructure Engineering, Dalian University of Technology, Dalian
[3] State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, China Nuclear Power Engineering Co., Ltd., Shenzhen
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2024年 / 45卷 / 09期
关键词：
base isolation; external source wave motion; nonrocky soils; nuclear island building; seismic response; shear wave velocity; soil-structure interaction; vibration method;
D O I：
10.11990/jheu.202207007
中图分类号：
学科分类号：
摘要：
To investigate the seismic performance of base-isolated nuclear power plants in nonrocky soils, a seismic soil-structure interaction (SSI) analysis method for nuclear power engineering structures based on the theory of external source wave motion is proposed. This method achieves high-precision input of seismic motion and direct solution of the overall system, with its efficacy confirmed by comparison with the traditional vibration method of a closed system. Furthermore, a comprehensive finite element model of a base-isolated nuclear island building-soil system was established. Seismic response analysis was conducted, and the seismic isolation performance of the nuclear island building in nonrocky soils with different shear wave velocities was discussed. The research findings indicated that in nonrocky soils, the base-isolated nuclear island building exhibited remarkable seismic isolation effects. As the shear wave velocity of the site decreased, the seismic isolation capacity of the base isolation gradually decreased. Compared with a site with a shear wave velocity of 1 067 m/ s, when the shear wave velocity of the site was 305 m/ s, the seismic isolation rates of the floor response spectra, acceleration amplification factor, and inter-story displacement angle at the top of the nuclear island building structure decreased by 14. 30%, 13. 50%, and 23. 41%, respectively. To ensure the safety of nuclear power plants, SSI effects on nonrocky soils should be fully considered in base isolation designs. © 2024 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：1679 / 1686
页数：7
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