{"title":"基础隔震结构在减轻地下爆炸引起的地动效应方面的性能分析:参数研究。","authors":"Rajkumar D, Ravi Sankar V, Sankarnarayanan R","doi":"10.1063/5.0224199","DOIUrl":null,"url":null,"abstract":"<p><p>This study delves into mitigating ground motion induced by underground blasts on superstructures. A parametric analysis is conducted to assess the performance of base isolated structures under different blast scenarios. The analysis is conducted using Newmark's time step integration method, and the absolute acceleration of the structure and displacement of the isolator bearing are calculated to evaluate the response. Results demonstrate the significant effectiveness of base isolation in reducing blast-induced vibrations. The parameters of the base isolator, including damping ratio and time period, are systematically varied to understand their impact on the response. Key findings include the significant influence of the ground medium on both fixed base and base isolated superstructures, with soil-rock interface locations reducing floor acceleration under various blast load intensities. The N-Z bearing system is shown to effectively reduce the dynamic response in both rock and soil media. This study recommends specific combinations of ground medium and site location for optimal protection against blast threats. Ultimately, this study facilitates a better understanding of the dynamic interaction between underground blasts and superstructures, paving the way for more effective blast-resistant structural designs.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Performance analysis of base-isolated structures in mitigating underground blast-induced ground motion effects: A parametric study.\",\"authors\":\"Rajkumar D, Ravi Sankar V, Sankarnarayanan R\",\"doi\":\"10.1063/5.0224199\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>This study delves into mitigating ground motion induced by underground blasts on superstructures. A parametric analysis is conducted to assess the performance of base isolated structures under different blast scenarios. The analysis is conducted using Newmark's time step integration method, and the absolute acceleration of the structure and displacement of the isolator bearing are calculated to evaluate the response. Results demonstrate the significant effectiveness of base isolation in reducing blast-induced vibrations. The parameters of the base isolator, including damping ratio and time period, are systematically varied to understand their impact on the response. Key findings include the significant influence of the ground medium on both fixed base and base isolated superstructures, with soil-rock interface locations reducing floor acceleration under various blast load intensities. The N-Z bearing system is shown to effectively reduce the dynamic response in both rock and soil media. This study recommends specific combinations of ground medium and site location for optimal protection against blast threats. Ultimately, this study facilitates a better understanding of the dynamic interaction between underground blasts and superstructures, paving the way for more effective blast-resistant structural designs.</p>\",\"PeriodicalId\":21111,\"journal\":{\"name\":\"Review of Scientific Instruments\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2024-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Review of Scientific Instruments\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1063/5.0224199\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"INSTRUMENTS & INSTRUMENTATION\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Review of Scientific Instruments","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1063/5.0224199","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
Performance analysis of base-isolated structures in mitigating underground blast-induced ground motion effects: A parametric study.
This study delves into mitigating ground motion induced by underground blasts on superstructures. A parametric analysis is conducted to assess the performance of base isolated structures under different blast scenarios. The analysis is conducted using Newmark's time step integration method, and the absolute acceleration of the structure and displacement of the isolator bearing are calculated to evaluate the response. Results demonstrate the significant effectiveness of base isolation in reducing blast-induced vibrations. The parameters of the base isolator, including damping ratio and time period, are systematically varied to understand their impact on the response. Key findings include the significant influence of the ground medium on both fixed base and base isolated superstructures, with soil-rock interface locations reducing floor acceleration under various blast load intensities. The N-Z bearing system is shown to effectively reduce the dynamic response in both rock and soil media. This study recommends specific combinations of ground medium and site location for optimal protection against blast threats. Ultimately, this study facilitates a better understanding of the dynamic interaction between underground blasts and superstructures, paving the way for more effective blast-resistant structural designs.
期刊介绍:
Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.