{"title":"常规和三维基座隔离核电站结构-土壤-结构相互作用效应的非线性数值研究","authors":"","doi":"10.1016/j.soildyn.2024.108985","DOIUrl":null,"url":null,"abstract":"<div><div>The three-dimensional (3D) isolation technology holds immense potential in the field of nuclear power plants (NPPs) due to its proficiency in mitigating vertical seismic impacts. In practice projects, multi-unit NPPs are a common form. As the site conditions become increasingly complex, the structure-soil-structure interaction (SSSI) effects are crucial in seismic assessments of NPPs. This study endeavours to meticulously simulate the scenarios where adjacent nuclear units are subjected to super-strong earthquakes. A novel time-domain coupled model and its computational procedure for nonlinear SSSI seismic analysis are proposed, and system models of ten NPPs are established to analyze the seismic responses of NPPs in firm rock and hard soil sites, and the impact of SSSI on the dynamic responses of conventional and 3D base-isolated NPPs is investigated in detail. Key findings illustrate that the SSSI effects on both conventional and 3D base-isolated NPPs are dependent on specific site conditions and inherent structural properties. For both conventional and 3D base-isolated NPPs, the floor response spectra and acceleration responses of a single NPP cannot fully envelope the scenarios where SSSI effects are considered. Furthermore, SSSI effects exert a more substantial influence on conventional NPPs compared to 3D base-isolated NPPs, with heightened effects at sites characterised by lower shear-wave velocities. These results furnish theoretical underpinnings for the seismic evaluation of multi-unit NPPs and the practical implementation of 3D base isolation in NPPs.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":null,"pages":null},"PeriodicalIF":4.2000,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Nonlinear numerical study of structure-soil-structure interaction effects between conventional and three-dimensional base-isolated nuclear power plants\",\"authors\":\"\",\"doi\":\"10.1016/j.soildyn.2024.108985\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The three-dimensional (3D) isolation technology holds immense potential in the field of nuclear power plants (NPPs) due to its proficiency in mitigating vertical seismic impacts. In practice projects, multi-unit NPPs are a common form. As the site conditions become increasingly complex, the structure-soil-structure interaction (SSSI) effects are crucial in seismic assessments of NPPs. This study endeavours to meticulously simulate the scenarios where adjacent nuclear units are subjected to super-strong earthquakes. A novel time-domain coupled model and its computational procedure for nonlinear SSSI seismic analysis are proposed, and system models of ten NPPs are established to analyze the seismic responses of NPPs in firm rock and hard soil sites, and the impact of SSSI on the dynamic responses of conventional and 3D base-isolated NPPs is investigated in detail. Key findings illustrate that the SSSI effects on both conventional and 3D base-isolated NPPs are dependent on specific site conditions and inherent structural properties. For both conventional and 3D base-isolated NPPs, the floor response spectra and acceleration responses of a single NPP cannot fully envelope the scenarios where SSSI effects are considered. Furthermore, SSSI effects exert a more substantial influence on conventional NPPs compared to 3D base-isolated NPPs, with heightened effects at sites characterised by lower shear-wave velocities. These results furnish theoretical underpinnings for the seismic evaluation of multi-unit NPPs and the practical implementation of 3D base isolation in NPPs.</div></div>\",\"PeriodicalId\":49502,\"journal\":{\"name\":\"Soil Dynamics and Earthquake Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.2000,\"publicationDate\":\"2024-09-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Soil Dynamics and Earthquake Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0267726124005372\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, GEOLOGICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Soil Dynamics and Earthquake Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0267726124005372","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
Nonlinear numerical study of structure-soil-structure interaction effects between conventional and three-dimensional base-isolated nuclear power plants
The three-dimensional (3D) isolation technology holds immense potential in the field of nuclear power plants (NPPs) due to its proficiency in mitigating vertical seismic impacts. In practice projects, multi-unit NPPs are a common form. As the site conditions become increasingly complex, the structure-soil-structure interaction (SSSI) effects are crucial in seismic assessments of NPPs. This study endeavours to meticulously simulate the scenarios where adjacent nuclear units are subjected to super-strong earthquakes. A novel time-domain coupled model and its computational procedure for nonlinear SSSI seismic analysis are proposed, and system models of ten NPPs are established to analyze the seismic responses of NPPs in firm rock and hard soil sites, and the impact of SSSI on the dynamic responses of conventional and 3D base-isolated NPPs is investigated in detail. Key findings illustrate that the SSSI effects on both conventional and 3D base-isolated NPPs are dependent on specific site conditions and inherent structural properties. For both conventional and 3D base-isolated NPPs, the floor response spectra and acceleration responses of a single NPP cannot fully envelope the scenarios where SSSI effects are considered. Furthermore, SSSI effects exert a more substantial influence on conventional NPPs compared to 3D base-isolated NPPs, with heightened effects at sites characterised by lower shear-wave velocities. These results furnish theoretical underpinnings for the seismic evaluation of multi-unit NPPs and the practical implementation of 3D base isolation in NPPs.
期刊介绍:
The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering.
Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.