Investigation on damage development of AP1000 nuclear power plant in strong ground motions with numerical simulation

Chen, Wanruo; Zhang, Yong Shan; Wang, Da Yang; Wu, Chengqing

doi:10.1016/j.net.2019.04.018

Cited by 12 publications

(1 citation statement)

References 26 publications

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“…Its first-order mode was along the direction of weaker stiffness, indicating that the AB changed the dynamic characteristics of the nuclear island structure, and the influence of the AB on the dynamic characteristics of the entire nuclear island structure could not be ignored. e entire nuclear island had to be considered to accurately reflect its seismic response characteristics, which was consistent with the research conclusions in [17].…”

Section: Modal Analysis Of Nuclear Island Structuresupporting

confidence: 69%

Nonlinear Seismic Response Characteristics of CAP1400 Nuclear Island Structure on Soft Rock Sites

Chen

2020

Science and Technology of Nuclear Installations

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CAP1400 nuclear island structure is an advanced and novel nuclear power plant structure. In order to explore the seismic response characteristics of CAP1400 nuclear island structure on soft rock sites, a three-dimensional refined nonlinear seismic response analysis model was established for a soft rock foundation-nuclear island structure system using ABAQUS software. The influences of the input ground motion intensity and the frequency spectrum characteristics on the acceleration, relative displacement, and floor response spectrum, as well as the critical shear wave velocity of nonbedrock sites for CAP1400 nuclear island structure, were proposed. The results suggested that the increasing amplitude of the peak acceleration and relative displacement of nuclear island structure decreased as the soft rock site entered a nonlinear state, and the high-frequency components of the input ground motion became more abundant. Specifically, the earthquake response was the largest at the cooling water tank on the top of the shield building, which was the focus of the seismic research on nuclear island structure. Due to the influence of the ground motion frequency spectrum characteristics and the nonbedrock site effect, the peak acceleration, peak relative displacement, and acceleration response spectrum of the nuclear island structure showed different changing trends for the near-field and far-field ground motions. Based on the influence of the site shear wave velocity on the seismic response of nuclear island structure, it was recommended that the critical shear wave velocity of nonbedrock sites for CAP1400 nuclear island structure should be 1250 m/s, and the nuclear island structure-foundation dynamic interaction could be ignored at this time. The research conclusions could provide some technical support and theoretical basis for the construction and seismic performance research of CAP1400 and other nuclear power plants.

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Section: Modal Analysis Of Nuclear Island Structuresupporting

confidence: 69%

Nonlinear Seismic Response Characteristics of CAP1400 Nuclear Island Structure on Soft Rock Sites

Chen

2020

Science and Technology of Nuclear Installations

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3D seismic response characteristics of a pile-mat-founded AP1000 nuclear-island building considering nonlinear hysteretic behavior of soil

Chen

Zhu

Chen

et al. 2022

Bull Earthquake Eng

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Given the increase of nuclear power plants, it has become unavoidable for the pile-supported nuclear-island buildings to be constructed on the coastal deposits potentially in uenced by strong earthquakes. The in uences of the hysteresis nonlinearity of soil and the soil-pile-structure interaction (SPSI) have not yet been considered in the seismic response analysis of the nuclear-island building, although it is a vital issue. On the basis of a newly developed generalized non-Masing hysteretic constitutive model, a 3D integrated simulation method is proposed to evaluate the seismic responses of the pile-mat-founded nuclear-island building system subjected to multidirectional earthquake motions. This integrated method involves an explicit parallel algorithm framework, comprising the nuclear-island building modeling, the pile-mat foundation modeling, the inhomogeneous soil domain modeling, and the arti cial boundary condition. The bedrock records of near-eld, moderate-far eld and far-eld earthquake scenarios are assumed for determining the bedrock motions of the ultimate and operational safety earthquakes. For an actual pile-mat-founded AP1000 nuclear-island building, the simulation results show the complexity and signi cance of the coupling effect of the site, the tridirectional earthquake shaking, and the secondary nonlinearity of soil. Such a complex coupling effect signi cantly increases the seismic responses of the pile-mat-founded nuclear-island building. A notable nding is that the scenario of moderate-far eld and far-eld strong motions may have more destructive potential to the pile-mat-founded nuclear-island buildings than the scenario of near-eld strong motions with the shorter durations and same amplitude. The results provide insights into the seismic design of the pile-mat-founded nuclear-island buildings, which could guide the design and construction of such similar facilities in the high seismic intensity regions.

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Improved soil–structure interaction model considering time-lag effect

Chen

2022

Computers and Geotechnics

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Investigation on damage development of AP1000 nuclear power plant in strong ground motions with numerical simulation

Cited by 12 publications

References 26 publications

Nonlinear Seismic Response Characteristics of CAP1400 Nuclear Island Structure on Soft Rock Sites

Nonlinear Seismic Response Characteristics of CAP1400 Nuclear Island Structure on Soft Rock Sites

3D seismic response characteristics of a pile-mat-founded AP1000 nuclear-island building considering nonlinear hysteretic behavior of soil

Improved soil–structure interaction model considering time-lag effect

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