Optimization of Seismic Base Isolation System Using Adaptive Harmony Search Algorithm

Ayla Ocak, Sinan Melih Nigdeli, Gebrail Bekdaş, Sanghun Kim and Zong Woo Geem
Additional contact information
Ayla Ocak: Department of Civil Engineering, İstanbul University-Cerrahpaşa, Istanbul 34320, Turkey
Sinan Melih Nigdeli: Department of Civil Engineering, İstanbul University-Cerrahpaşa, Istanbul 34320, Turkey
Gebrail Bekdaş: Department of Civil Engineering, İstanbul University-Cerrahpaşa, Istanbul 34320, Turkey
Sanghun Kim: Department of Civil and Environmental Engineering, Temple University, Philadelphia, PA 19122, USA
Zong Woo Geem: College of IT Convergence, Gachon University, Seongnam 13120, Korea

Sustainability, 2022, vol. 14, issue 12, 1-16

Abstract: In this study, a seismic isolator placed on the base of a structure was optimized under various earthquake records using an adaptive harmony search algorithm (AHS). As known, the base-isolation systems with very low stiffness provide a rigid response of superstructure, so it was assumed that the structure is rigid and the base-isolated structure can be considered as a single-degree of freedom structure. By using this assumption, an optimization method that is independent of structural properties but specific to the chosen earthquake excitation set is proposed. By taking three different damping ratio limits and isolator displacement limits, the isolator period and damping ratio were optimized so that the acceleration of the structure was minimized for nine cases. In the critical seismic analysis performed with optimum isolator parameters, the results obtained for different damping ratios and isolator periods were compared. From the results, it is determined that isolators with low damping ratios require more ductility, and as the damping ratio increases, further restriction of the movement of the isolator increases the control efficiency. Thus, it is revealed that increasing the ductility of the isolator is effective in reducing the total acceleration in the structure.

Keywords: harmony search; adaptive harmony search; seismic isolation; structural control; optimization (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/12/7456/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/12/7456/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:12:p:7456-:d:841988

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().