Seismic Retrofitting of Existing RCC Buildings Using Hybrid Dampers: A Comparative Study on Cost Efficiency of Hybrid, FVD & TMD Systems

Abstract

This thesis presents a study on the effectiveness of different types of dampers in enhancing the seismic performance of an existing 10-story reinforced concrete building in Dhaka, Bangladesh, originally designed following BNBC 1993 provisions. A comparative analysis was conducted using Response Spectrum Analysis in ETABS to evaluate story displacement, inter-story drift, and base shear with and without the implementation of dampers. The results indicate that the incorporation of viscous, tune mass and hybrid dampers significantly reduces seismic responses, thereby improving overall building performance. The study highlights the importance of retrofitting old structures with modern energy dissipation devices as a cost-effective and reliable solution for seismic risk mitigation. This research provides valuable insights for structural engineers, researchers, and policymakers. The findings may support future strategies for improving earthquake resilience in Bangladesh and other seismic regions.