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Humanity’s demand for nuclear energy has driven its development, yet the frequent occurrence of nuclear accidents has emphasized the crucial importance of safety. Earthquakes, especially near-field earthquakes, pose a substantial threat to the safety of large structures, such as nuclear power plants. Traditional seismic response analyses of nuclear power plants often depend on the assumption of vertical incidence of input motions. However, near-field earthquakes predominantly exhibit oblique incidence, resulting to more intricate and diverse effects. This paper realizes the simulation of obliquely incident ground motions by using the three-dimensional visco-spring artificial boundary method to build a comprehensive model of the nuclear containment structure and its surrounding soil. Subsequently, two typical input motions—P-waves and SV-waves—are selected and input into the model at varying angles of incidence to conduct an in-depth analysis of the seismic dynamic response of the nuclear containment shell. Based on the research results, it can be observed that the dynamic response of the nuclear containment shell under near-field earthquakes exhibits more complicated characteristics, which cannot be entirely captured by assuming vertical incidence of input motions. This finding emphasizes the significant impact of near-field seismic motion patterns on the dynamic response of nuclear power structures, providing quantitative insights and valuable references for the seismic design and optimization of similar projects.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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