Seismic Soil-Structure Interaction Analysis of Isolated Nuclear Power Plants in Frequency Domain
One important aspect of applying seismic isolation to Nuclear Power Plants (NPPs) is that the complex interactions of flexible soil, flexible isolators, and stiff structures require careful investigation. In this paper, a NPP model was used to investigate the effects of SSI and the effects of changi...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2016/6127895 |
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| _version_ | 1841524797388881920 |
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| author | Zhiguang Zhou Xiaodong Wei |
| author_facet | Zhiguang Zhou Xiaodong Wei |
| author_sort | Zhiguang Zhou |
| collection | DOAJ |
| description | One important aspect of applying seismic isolation to Nuclear Power Plants (NPPs) is that the complex interactions of flexible soil, flexible isolators, and stiff structures require careful investigation. In this paper, a NPP model was used to investigate the effects of SSI and the effects of changing soil and isolator properties on seismic response of an isolated NPP. The following aspects are considered in the study: horizontal excitation and vertical excitation; linear and equivalent-linear models of the isolators; scaling of the shear modulus of the soil profile model; and scaling of the horizontal equivalent stiffness of the isolators. It was found that Pseudospectral Acceleration (PSA) in the nuclear structure at the frequencies near the natural frequency of the structure increase with elevation, and the difference between the in-structure response spectral acceleration with and without SSI effects is concentrated at the frequencies near the natural frequencies of the superstructure. It is also found that the linear SSI analysis underestimates the in-structure response of the nuclear structures compared to the equivalent-linear SSI analyses, and the soil profile properties directly affect the effectiveness of the isolation system. |
| format | Article |
| id | doaj-art-ac1c9c7f5d5b49a9881fa25ba2b76f60 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-ac1c9c7f5d5b49a9881fa25ba2b76f602025-02-03T05:47:21ZengWileyShock and Vibration1070-96221875-92032016-01-01201610.1155/2016/61278956127895Seismic Soil-Structure Interaction Analysis of Isolated Nuclear Power Plants in Frequency DomainZhiguang Zhou0Xiaodong Wei1College of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaOne important aspect of applying seismic isolation to Nuclear Power Plants (NPPs) is that the complex interactions of flexible soil, flexible isolators, and stiff structures require careful investigation. In this paper, a NPP model was used to investigate the effects of SSI and the effects of changing soil and isolator properties on seismic response of an isolated NPP. The following aspects are considered in the study: horizontal excitation and vertical excitation; linear and equivalent-linear models of the isolators; scaling of the shear modulus of the soil profile model; and scaling of the horizontal equivalent stiffness of the isolators. It was found that Pseudospectral Acceleration (PSA) in the nuclear structure at the frequencies near the natural frequency of the structure increase with elevation, and the difference between the in-structure response spectral acceleration with and without SSI effects is concentrated at the frequencies near the natural frequencies of the superstructure. It is also found that the linear SSI analysis underestimates the in-structure response of the nuclear structures compared to the equivalent-linear SSI analyses, and the soil profile properties directly affect the effectiveness of the isolation system.http://dx.doi.org/10.1155/2016/6127895 |
| spellingShingle | Zhiguang Zhou Xiaodong Wei Seismic Soil-Structure Interaction Analysis of Isolated Nuclear Power Plants in Frequency Domain Shock and Vibration |
| title | Seismic Soil-Structure Interaction Analysis of Isolated Nuclear Power Plants in Frequency Domain |
| title_full | Seismic Soil-Structure Interaction Analysis of Isolated Nuclear Power Plants in Frequency Domain |
| title_fullStr | Seismic Soil-Structure Interaction Analysis of Isolated Nuclear Power Plants in Frequency Domain |
| title_full_unstemmed | Seismic Soil-Structure Interaction Analysis of Isolated Nuclear Power Plants in Frequency Domain |
| title_short | Seismic Soil-Structure Interaction Analysis of Isolated Nuclear Power Plants in Frequency Domain |
| title_sort | seismic soil structure interaction analysis of isolated nuclear power plants in frequency domain |
| url | http://dx.doi.org/10.1155/2016/6127895 |
| work_keys_str_mv | AT zhiguangzhou seismicsoilstructureinteractionanalysisofisolatednuclearpowerplantsinfrequencydomain AT xiaodongwei seismicsoilstructureinteractionanalysisofisolatednuclearpowerplantsinfrequencydomain |