Optimal design of inertial amplifier base isolators for dynamic response control of multi-storey buildings

Chowdhury, S., Banerjee, A. and Adhikari, S. (2023) Optimal design of inertial amplifier base isolators for dynamic response control of multi-storey buildings. International Journal of Structural Stability and Dynamics, 23(5), 2350047. (doi: 10.1142/s0219455423500475)

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Abstract

The optimal design of inertial amplifier base isolators (IABI) for dynamic response mitigation of multi-storey buildings subjected to base excitations has been studied in this paper. In order to achieve the closed-form expressions for optimal design parameters of IABI, H2 optimization method has been employed. The effectiveness of the closed-form expressions for optimal design parameters was evaluated by determining the isolated structures’ frequency and time domain responses and comparing them to the corresponding responses obtained from equivalent uncontrolled structures. A numerical study employing the Newmark-beta method is conducted to obtain time-domain responses using near-field earthquake base excitation. The response reduction capacity (%) of the optimum inertial amplifier base isolator is compared to the response reduction capacity (%) of the optimum traditional base isolators, demonstrating that inertial amplifiers have increased the vibration reduction performance of traditional base isolators by 50% to 60%. All the outcomes from the study are mathematically accurate and also feasible for practical design purposes.

Item Type:Articles
Additional Information:The authors’ would like to acknowledge the Inspire faculty grant, grant number DST/ INSPIRE/04/2018/000052 for partial financial support for the project. SC would like to acknowledge the MHRD grant received from IIT Delhi during the period of this research work.
Keywords:Applied Mathematics, Mechanical Engineering, Ocean Engineering, Aerospace Engineering, Building and Construction, Civil and Structural Engineering
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Adhikari, Professor Sondipon
Authors: Chowdhury, S., Banerjee, A., and Adhikari, S.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:International Journal of Structural Stability and Dynamics
Publisher:World Scientific Pub Co Pte Ltd
ISSN:0219-4554
ISSN (Online):1793-6764
Published Online:15 September 2022
Copyright Holders:Copyright © 2022 World Scientific Publishing Company
First Published:First published in International Journal of Structural Stability and Dynamics 23(5): 2350047
Publisher Policy:Reproduced in accordance under a Creative Commons License

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