Nuclear reactor building structures under aircraft impact on the dome shell considering different load—time characteristics

2020 ◽  
pp. 33-39
Author(s):  
F. Stangenberg ◽  
R. Zinn
Keyword(s):  
Nuclear Reactor ◽  
Building Structures ◽  
Reactor Building

scholarly journals Structural Modeling and Dynamic Analysis of a Nuclear Reactor Building

2020 ◽  
Author(s):  
Evrim Oyguc ◽  
Abdul Hayır ◽  
Resat Oyguc
Keyword(s):  
Nonlinear Dynamic ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Nuclear Reactor ◽  
Energy Sources ◽  
Finite Element Program ◽  
Design Spectrum ◽  
Reactor Building ◽  
Set Up

Increasing energy demand urge the developing countries to consider different types of energy sources. Owing the fact that the energy production capacity of renewable energy sources is lower than a nuclear power plant, developed countries like US, France, Japan, Russia and China lead to construct nuclear power plants. These countries compensate 80% of their energy need from nuclear power plants. Further, they periodically conduct tests in order to assess the safety of the existing nuclear power plants by applying impact type loads to the structures. In this study, a sample third-generation nuclear reactor building has been selected to assess its seismic behavior and to observe the crack propagations of the prestressed outer containment. First, a 3D model has been set up using ABAQUS finite element program. Afterwards, modal analysis is conducted to determine the mode shapes. Nonlinear dynamic time history analyses are then followed using an artificial strong ground motion which is compatible with the mean design spectrum of the previously selected ground motions that are scaled to Eurocode 8 Soil type B design spectrum. Results of the conducted nonlinear dynamic analyses are considered in terms of stress distributions and crack propagations.

Numerical modeling of floating bodies transport for flooding analysis in nuclear reactor building

2019 ◽  
Vol 341 ◽  
pp. 390-405 ◽  
Author(s):  
Zidi Wang ◽  
Fangyuan Hu ◽  
Guangtao Duan ◽  
Kazuya Shibata ◽  
Seiichi Koshizuka
Keyword(s):  
Numerical Modeling ◽  
Nuclear Reactor ◽  
Floating Bodies ◽  
Reactor Building

Forced vibration tests and simulation analyses of a nuclear reactor building

1998 ◽  
Vol 179 (2) ◽  
pp. 145-156 ◽  
Author(s):  
S. Nakagawa ◽  
M. Kuno ◽  
Y. Naito ◽  
T. Nozawa ◽  
T. Momma ◽  
...  
Keyword(s):  
Forced Vibration ◽  
Nuclear Reactor ◽  
Reactor Building ◽  
Vibration Tests

scholarly journals Influence of Vertical Equivalent Damping Ratio on Seismic Isolation Effectiveness of Nuclear Reactor Building

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4602
Author(s):  
Xiuyun Zhu ◽  
Jianbo Li ◽  
Gao Lin ◽  
Rong Pan
Keyword(s):  
Seismic Response ◽  
Seismic Isolation ◽  
Nuclear Reactor ◽  
Damping Ratio ◽  
Response Spectra ◽  
Horizontal Displacement ◽  
Vertical Displacement ◽  
Vertical Acceleration ◽  
Equivalent Damping ◽  
Reactor Building

This paper aimed at evaluating the influence of different vertical equivalent damping ratios of a 3-dimensional combined isolation bearing (3D-CIB) as regards seismic response and isolation effectiveness. A comparative study of the seismic response in terms of acceleration floor response spectra (FRS), peak acceleration, displacement response of the nuclear reactor building, and dynamic response of the 3D-CIB was carried out. The results showed that: (1) the horizontal FRS is slightly influenced by the vertical equivalent damping ratio of 3D-CIB, whereas the increase of the vertical equivalent damping ratio has a significant effect on reducing the vertical FRS; (2) the peak vertical acceleration increased with the decrease in the vertical equivalent damping ratios of 3D-CIB and the difference of peak accelerations calculated by the damping ratio of 20 and 25% is within 10%; (3) the increase of the vertical equivalent damping ratio is capable of reducing the horizontal displacement and the rocking effect of the superstructure, and effectively controlling the vertical displacement amplitude; and (4) the vertical equivalent damping ratio of 3D-CIB has a slight effect on its axial force. Consequently, it is demonstrated that the increase of the vertical equivalent damping ratio is advantageous for isolation effectiveness. From the view of displacement control, it is suggested that the 3D-CIB with the vertical an equivalent damping ratio of 15~20% is appropriate and acceptable.

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