Dynamic Analysis of FRP Retrofitted RC Column Subjected to Combined Blast and Seismic Loading

This study examines the increasing risks of explosives and seismic events on civilian infrastructure, which are being driven by the increased danger of terrorist acts and the persistent risk of earthquakes. Explosive occurrences represent a significant threat to the built environment, compromising vital life-safety systems. Earthquakes, with their tremendous destructive power, may cause destruction on structures by violently shaking the earth and causing dangerous circumstances. The aim of this study is to assess the performance of FRP (Fiber Reinforced Polymer) retrofitted RC (Reinforced Concrete) column under combined blast and seismic loads. The combined impact of blast and seismic loads adds complexity, demanding a complete structural design approach to guaranteeing resilience in critical infrastructure. Progressive collapse, frequently caused by unexpected failures in load-bearing columns, emphasizes the importance of column performance in overall structural viability. To address these challenges, this project investigates the dynamic response of RC short column retrofitted with Carbon Fiber Reinforced Polymer (CFRP), Glass Fiber Reinforced Polymer (GFRP), and Aramid Fiber Reinforced Polymer (AFRP) to blast load, seismic load, and combined blast and seismic loads, with a focus on columns’ vital function. The study employs LS-DYNA software for modelling and analysis, with the goal of providing insights into how different FRPs affect the performance of an RC column under complex dynamic situations. The findings are critical for furthering the understanding of structural behavior and improving retrofitting procedures to increase structural resilience.