Author(s): Valentina López, Martín González and Sofía Pérez

Abstract: Seismic retrofitting is a critical strategy for enhancing the resilience of aging infrastructure in earthquake-prone regions, where outdated construction methods often fail to meet modern seismic safety standards. This study evaluated the effectiveness of three advanced retrofitting techniques—Base Isolation, Energy Dissipation Devices, and Fiber-Reinforced Composites—based on their impact on interstudy drift reduction, base shear reduction, energy dissipation capacity, and cost-effectiveness. Using a combination of analytical modelling and scaled shake table experiments, the study simulated the seismic performance of retrofitted structures under varying load conditions. Statistical analyses, including ANOVA, were conducted to assess the significance of differences between techniques. The results revealed that Base Isolation was the most effective technique, achieving a 45% reduction in interstory drift, a 50% reduction in base shear, and a 60% increase in energy dissipation capacity, with a cost-effectiveness score of 8.5 out of 10. Fiber-Reinforced Composites followed closely, with a balance of performance and affordability, while Energy Dissipation Devices showed moderate effectiveness suitable for less critical applications. These findings align with previous studies and highlight the importance of selecting retrofitting strategies based on structural and economic constraints. The study concluded that Base Isolation is the preferred choice for critical infrastructure, while Fiber-Reinforced Composites are recommended for mid-tier projects. Hybrid approaches and advancements in material science were suggested as future research directions to optimize retrofitting effectiveness. Practical recommendations included integrating retrofitting into building codes, providing financial incentives, and enhancing professional capacity through training and awareness programs. These measures, combined with continued research, can significantly improve disaster resilience and public safety in earthquake-prone regions.

Pages: 39-42 | Views: 147 | Downloads: 114

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