{"title":"用于分析具有单面任意阶梯地形的层状场地波场的地界散射法","authors":"","doi":"10.1016/j.compgeo.2024.106858","DOIUrl":null,"url":null,"abstract":"<div><div>This study proposes a ground-boundary scatter method for calculating wavefields in layered sites with stepped topographies. The total wavefield is decomposed into the free field of the flat site and the reflected wavefield from the ground. The wave-reflection equivalent forces are calculated through a dynamic analysis of the ground-boundary substructure intercepted from a full-domain site model. In the scattering analysis, a scaling-line-based scaled boundary finite-element method in the time domain is developed for the high-accuracy simulations of semi-infinity in an asymmetric layered half-space. A domain reduction method based on accurate wavefield solutions is used to analyze the soil–structure interaction. The proposed method makes complex topography-dependent wavefield calculations more flexible and practical, thus overcoming the limitations of traditional methods for seismic input. It can be used for localized arbitrarily shaped stepped topographies based on near-field finite-element models, thereby satisfying engineering requirements. The detailed implementation steps are described. For validation, numerical examples of wave propagation are for in homogeneous and layered stepped half-space containing valleys and irregular stepped terrains under different plane-wave incidence directions. The engineering applicability of this method is benchmarked through the seismic analyses of a nuclear structure built on different single-faced stepped-topography sites, revealing its potential adverse effects on structural response.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ground-boundary scatter method for wavefield analysis of layered sites with single-faced arbitrarily stepped topographies\",\"authors\":\"\",\"doi\":\"10.1016/j.compgeo.2024.106858\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study proposes a ground-boundary scatter method for calculating wavefields in layered sites with stepped topographies. The total wavefield is decomposed into the free field of the flat site and the reflected wavefield from the ground. The wave-reflection equivalent forces are calculated through a dynamic analysis of the ground-boundary substructure intercepted from a full-domain site model. In the scattering analysis, a scaling-line-based scaled boundary finite-element method in the time domain is developed for the high-accuracy simulations of semi-infinity in an asymmetric layered half-space. A domain reduction method based on accurate wavefield solutions is used to analyze the soil–structure interaction. The proposed method makes complex topography-dependent wavefield calculations more flexible and practical, thus overcoming the limitations of traditional methods for seismic input. It can be used for localized arbitrarily shaped stepped topographies based on near-field finite-element models, thereby satisfying engineering requirements. The detailed implementation steps are described. For validation, numerical examples of wave propagation are for in homogeneous and layered stepped half-space containing valleys and irregular stepped terrains under different plane-wave incidence directions. The engineering applicability of this method is benchmarked through the seismic analyses of a nuclear structure built on different single-faced stepped-topography sites, revealing its potential adverse effects on structural response.</div></div>\",\"PeriodicalId\":55217,\"journal\":{\"name\":\"Computers and Geotechnics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2024-10-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Computers and Geotechnics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0266352X24007973\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computers and Geotechnics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0266352X24007973","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
Ground-boundary scatter method for wavefield analysis of layered sites with single-faced arbitrarily stepped topographies
This study proposes a ground-boundary scatter method for calculating wavefields in layered sites with stepped topographies. The total wavefield is decomposed into the free field of the flat site and the reflected wavefield from the ground. The wave-reflection equivalent forces are calculated through a dynamic analysis of the ground-boundary substructure intercepted from a full-domain site model. In the scattering analysis, a scaling-line-based scaled boundary finite-element method in the time domain is developed for the high-accuracy simulations of semi-infinity in an asymmetric layered half-space. A domain reduction method based on accurate wavefield solutions is used to analyze the soil–structure interaction. The proposed method makes complex topography-dependent wavefield calculations more flexible and practical, thus overcoming the limitations of traditional methods for seismic input. It can be used for localized arbitrarily shaped stepped topographies based on near-field finite-element models, thereby satisfying engineering requirements. The detailed implementation steps are described. For validation, numerical examples of wave propagation are for in homogeneous and layered stepped half-space containing valleys and irregular stepped terrains under different plane-wave incidence directions. The engineering applicability of this method is benchmarked through the seismic analyses of a nuclear structure built on different single-faced stepped-topography sites, revealing its potential adverse effects on structural response.
期刊介绍:
The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.