Published Paper Details:

Rapid urbanization and population growth have led to an increasing demand for high-rise buildings in urban areas where land availability is limited. As the height of buildings increases, their vulnerability to lateral loads such as earthquakes and wind also increases. High-rise reinforced concrete (RC) buildings are particularly susceptible to excessive lateral displacement, story drift, and torsional effects during seismic events. Therefore, it becomes essential to incorporate efficient lateral load-resisting systems to ensure the safety, stability, and serviceability of such structures. Among the various structural systems available, reinforced concrete shear walls and steel bracing systems have proven to be effective in enhancing the seismic performance of multi-storey buildings. Shear walls provide significant lateral stiffness and strength, while steel bracing systems improve the load-resisting capacity and energy dissipation of the structural frame. The combined use of these systems can further enhance the overall performance of high-rise buildings subjected to seismic forces. The present study focuses on the analysis and comparison of the structural behaviour of a high-rise RC building of G+40 storeys using different lateral load resisting systems. The main objective of this research is to evaluate the effectiveness of RC shear walls and steel bracing systems in controlling lateral displacement, story drift, and overall structural response under seismic loading conditions. A three-dimensional model of the building is developed and analysed using ETABS software. Different structural configurations are considered, including a bare frame model, a model with RC shear walls, a model with various steel bracing arrangements and a model with both the systems RC shear wall and steel bracing. These models are analysed to study their dynamic behaviour and seismic performance. The seismic analysis of the building is carried out using appropriate methods in accordance with relevant design codes. Important structural response parameters such as base shear, story displacement, story drift, fundamental time period, and story stiffness are evaluated and compared for different structural systems. The analysis aims to determine how the introduction of shear walls and bracing systems influences the lateral stiffness and overall stability of the building. The results obtained from the analysis indicate that the inclusion of RC shear walls and steel bracing significantly increases the stiffness of the building and reduces lateral displacement and story drift enhancing lateral load resistance and reducing the fundamental time period of the structure. The study also highlights that different bracing configurations have varying levels of effectiveness in controlling seismic response. In many cases, the combination of shear walls and steel bracing systems provides better performance compared to using either system alone. Overall, this study demonstrates that the proper selection and placement of shear walls and steel bracing systems play a crucial role in improving the seismic performance of high-rise buildings. The findings of this research provide useful insights for structural engineers in designing safer and more efficient high-rise RC buildings in earthquake-prone regions. The results can contribute to optimizing lateral load resisting systems for tall buildings and improving their resilience against seismic forces.