Innovative Methodology for Optimal Placement of Prestressed Damping Devices in Steel Structures

Aleksandra Bogdanovic

The submitted achievement presents the development and validation of an innovative methodology for the optimal placement of prestressed damping devices (PDDs) in steel frame structures exposed to seismic loading.The project combines experimental research, advanced numerical modelling, and optimization techniques to enhance structural resilience while reducing retrofit costs. The methodology was developed through a comprehensive research programme at the Institute of Earthquake Engineering and Engineering Seismology (IZIIS), including large-scale shake table testing of a five-storey steel structure equipped with damping devices, analytical verification using finite element modelling, and the implementation of a novel optimization framework based on genetic algorithms. The key innovation is the development of a unique fitness function that simultaneously evaluates structural response and energy dissipation efficiency to determine the optimal distribution of damping devices within a three-dimensional structural system. Unlike conventional design approaches based on engineering judgement or simplified analyses, the proposed methodology enables objective, data-driven decision-making and identifies solutions that maximize performance while minimizing resource consumption. The optimized configurations achieved significant reductions in structural accelerations, inter-storey drifts, and seismic forces, resulting in improved safety, functionality, and resilience of buildings subjected to earthquake actions. The methodology offers a practical engineering tool for both new construction and seismic retrofitting of existing structures, contributing to more sustainable and cost-effective earthquake-resistant design. By integrating experimental validation, computational engineering, and innovation, this project advances structural control technologies and transforms scientific research into a practical engineering solution with lasting benefits for safer communities.

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Aleksandra Bogdanovic MK

http://www.iziis.ukim.edu.mk
Todor Aleksandrov 165 | 1000 Skopje