Seismic Performance Evaluation of a Building Incorporating Different Lateral Load Resisting Systems

Abstract

Earthquakes produce significant lateral forces on structures, which may lead to excessive displacement, structural instability, and collapse if proper seismic resistant measures are not adopted. The present study focuses on the comparative seismic performance evaluation of a G+11 reinforced cement concrete (RCC) building incorporated with different vibration control system using ETABS 20. The building was analyzed for Seismic Zone V using the Response Spectrum Analysis (RSA) method in accordance with the provisions of IS 1893 (Part 1): 2016. Six structural models were considered in the study, namely bare frame structure, fluid viscous damper model, friction damper model, X-bracing model, shear wall model, and lead rubber bearing (LRB) base isolated model. The seismic performance of each model was evaluated based on parameters such as maximum storey displacement, storey drift and storey shear. The results obtained from the analysis indicate that the Shear Wall model provides the most effective reduction in displacement and drift due to its Enhanced stiffness, although the shear wall and bracing systems significantly improve structural stiffness but attract higher seismic forces hence greater base shear than bare frame model. The fluid viscous damper and friction damper showed overall good seismic performance by reducing the overall displacement, drift and storey shear without attracting higher seismic forces. The base isolated model increases the displacement due to increased flexibility in the structure but reduces drift and force transmission into the structure. The study concludes that vibration control systems considerably enhance the seismic performance of RCC structures and assist in improving structural safety in earthquake-prone regions.