Retrofit Strategies for Seismic Protection of Multi-Story Structures with Extended KDamper Devices

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Published: Apr 30, 2024
DOI: https://doi.org/10.12681/ta.36870
Keywords:
Seismic Retrofitting Damping Negative Stiffness KDamper
Konstantinos Kapasakalis
Institute of Structural Analysis and Antiseismic Research, School of Civil Engineering, National Technical University of Athens
https://orcid.org/0000-0002-6619-7374
Antonios Mantakas
Institute of Structural Analysis and Antiseismic Research, School of Civil Engineering, National Technical University of Athens
https://orcid.org/0000-0001-8136-5922
Moris Kalderon
Dynamics and Acoustics Laboratory, School of Mechanical Engineering, National Technical University of Athens
https://orcid.org/0000-0002-1593-9892
Evangelos Sapountzakis
Institute of Structural Analysis and Antiseismic Research, School of Civil Engineering, National Technical University of Athens
https://orcid.org/0000-0002-1677-3070
Abstract

This paper evaluates the efficiency of the extended version of the KDamper (EKD) as a seismic retrofitting solution for existing multi-story building structures. Two distinct approaches are investigated. The first one considers the implementation of an EKD device at the structure's base level, a straightforward approach that simplifies the design process. The second one involves the dispersion of multiple EKDs throughout the height of the structure, a more computationally demanding approach, that aims to control higher modes, especially in high-rise structures. Three test cases are investigated, representing low, mid, and high-rise building structures. The primary objective is to provide insights into the effectiveness of each retrofitting strategy based on the structure's height and number of stories, presenting a comprehensive assessment of the advantages and disadvantages of each option. Overall, the results underscore the positive influence of the EKD system on the dynamic response of all examined multi-story structures, establishing it as a compelling technology for seismic retrofitting. Designers can compare different retrofitting strategies based on building height and number of stories to choose the most efficient option.

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  • Material Science and Engineering
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