Comparative Seismic Analysis of High-Rise Buildings Using Recycled and Conventional Steel in the Context of Bangladesh.

Abstract

This study examines the seismic and economic feasibility of using recycled steel as a substitute for conventional steel in the construction of high-rise buildings across all four seismic zones in Bangladesh. Recycled steel has become a promising solution as the building industry becomes increasingly concerned about environmental sustainability and resource efficiency. It has the ability to lower the cost of building and lessen its impact on the environment while yet achieving structural performance standards. The study utilizes ETABS 2022 software to model and evaluate a 10-story building, aiming to determine the feasibility of this technique. The analysis examines three representative lateral load-resisting systems—moment-resisting frames, shear walls, and bracing systems subjected to seismic loading conditions as delineated in BNBC 2020 for seismic zones 1 to 4. Researchers determined the mechanical properties of recycled steel through experiments with varying carbon content (0.25%, 0.27%, and 0.30%) and heating the steel evenly to 760°C. Along with evaluating the structural performance, a cost-benefit analysis was conducted comparing recycled and regular steel, taking into account factors such as the ease of obtaining materials, design requirements, and long-term maintenance costs. The study aims to determine if recycled steel meets the necessary standards of strength, ductility, and reliability to be considered a viable alternative in structural design, particularly in regions prone to earthquakes. The results of this study are anticipated to yield significant insights for civil engineers, architects, and urban planners in pursuit of sustainable solutions for resilient infrastructure development in Bangladesh. The results may also be used to modify local building regulations and promote the use of environmentally friendly products in everyday life.