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Enhanced seismic base isolation using inertial amplifiers

Sudip Chowdhury, Arnab Banerjee, Sondipon Adhikari

Structures, Volume: 33, Pages: 1340 - 1353

Swansea University Author: Sondipon Adhikari

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DOI (Published version): 10.1016/j.istruc.2021.04.089

Abstract

Harnessing the concept of inertial amplification, an inertial amplifier coupled base isolator (IABI) is proposed in this paper. The seismic performance, in terms of story drift, base shear reduction, of this proposed inertial amplifier coupled base isolator has been compared with that of the classic...

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Published in: Structures
ISSN: 2352-0124
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa56982
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spelling 2021-06-15T15:06:07.2670049 v2 56982 2021-05-28 Enhanced seismic base isolation using inertial amplifiers 4ea84d67c4e414f5ccbd7593a40f04d3 Sondipon Adhikari Sondipon Adhikari true false 2021-05-28 FGSEN Harnessing the concept of inertial amplification, an inertial amplifier coupled base isolator (IABI) is proposed in this paper. The seismic performance, in terms of story drift, base shear reduction, of this proposed inertial amplifier coupled base isolator has been compared with that of the classical base isolator (CBI) and inerter-based isolation system (Inerter-BI). A thorough analytical study, implementing rationals of random vibration for harmonic and Gaussian white noise is conducted to identify the performance of the inertial amplifier coupled base isolator (IABI) in the frequency domain. Further, a numerical study is conducted to determine the story drift, base shear response in time-domain for the inertial amplifier based base-isolated structure and classical base-isolated structure for twenty-two real earthquake ground motions. The results elucidate the histogram of base shear and story drift reduction percentage shifts towards higher values for inertial amplifier coupled isolator compared to CBI and Inerter-BI. From both analytical and numerical study, it is observed that the seismic performance and response reduction capacity of proposed IABI is significantly 89.38% and 72% superior to the classical base isolator and inerter-based isolation system, respectively. This finding evidenced towards the supremacy of the inertial amplifier base isolator over the classical base isolator and inerter coupled base isolator in terms of seismic vibration control. Journal Article Structures 33 1340 1353 Elsevier BV 2352-0124 Inertial amplification, Inertial amplifier coupled base isolator, Stochastic analysis, Classical base isolator, Inerter-based isolation system 1 10 2021 2021-10-01 10.1016/j.istruc.2021.04.089 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2021-06-15T15:06:07.2670049 2021-05-28T09:12:45.9955142 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Sudip Chowdhury 1 Arnab Banerjee 2 Sondipon Adhikari 3 56982__20040__fba5ce8f437f483ca44118a3ddb88256.pdf 56982.pdf 2021-06-01T10:22:37.9130334 Output 3887233 application/pdf Accepted Manuscript true 2022-05-20T00:00:00.0000000 ©2021 All rights reserved. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND) true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Enhanced seismic base isolation using inertial amplifiers
spellingShingle Enhanced seismic base isolation using inertial amplifiers
Sondipon Adhikari
title_short Enhanced seismic base isolation using inertial amplifiers
title_full Enhanced seismic base isolation using inertial amplifiers
title_fullStr Enhanced seismic base isolation using inertial amplifiers
title_full_unstemmed Enhanced seismic base isolation using inertial amplifiers
title_sort Enhanced seismic base isolation using inertial amplifiers
author_id_str_mv 4ea84d67c4e414f5ccbd7593a40f04d3
author_id_fullname_str_mv 4ea84d67c4e414f5ccbd7593a40f04d3_***_Sondipon Adhikari
author Sondipon Adhikari
author2 Sudip Chowdhury
Arnab Banerjee
Sondipon Adhikari
format Journal article
container_title Structures
container_volume 33
container_start_page 1340
publishDate 2021
institution Swansea University
issn 2352-0124
doi_str_mv 10.1016/j.istruc.2021.04.089
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description Harnessing the concept of inertial amplification, an inertial amplifier coupled base isolator (IABI) is proposed in this paper. The seismic performance, in terms of story drift, base shear reduction, of this proposed inertial amplifier coupled base isolator has been compared with that of the classical base isolator (CBI) and inerter-based isolation system (Inerter-BI). A thorough analytical study, implementing rationals of random vibration for harmonic and Gaussian white noise is conducted to identify the performance of the inertial amplifier coupled base isolator (IABI) in the frequency domain. Further, a numerical study is conducted to determine the story drift, base shear response in time-domain for the inertial amplifier based base-isolated structure and classical base-isolated structure for twenty-two real earthquake ground motions. The results elucidate the histogram of base shear and story drift reduction percentage shifts towards higher values for inertial amplifier coupled isolator compared to CBI and Inerter-BI. From both analytical and numerical study, it is observed that the seismic performance and response reduction capacity of proposed IABI is significantly 89.38% and 72% superior to the classical base isolator and inerter-based isolation system, respectively. This finding evidenced towards the supremacy of the inertial amplifier base isolator over the classical base isolator and inerter coupled base isolator in terms of seismic vibration control.
published_date 2021-10-01T04:12:22Z
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score 10.997866

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