Performance Assessment of Moment Resisting Frame-Shear Wall Systems with Fluid Viscous Dampers and Lead Rubber Bearings Subjected to Near and Far-Field Earthquakes

This study presents a comparative evaluation of the seismic performance of high-rise residential buildings, focusing on passive control strategies under both near-field and far-field earthquake conditions. Five structural configurations are developed using finite element software ETABS. A baseline model with a Moment Resisting Frame and Shear Wall (MRFSW), a full Shear Wall (SW) system common in Mivan-type construction, MRFSW with Fluid Viscous Dampers (FVD), MRFSW with Lead Rubber Bearings (LRB), and a hybrid setup incorporating both FVD and LRB (FVD+LRB) are considered. Seismic analyses were performed using both Response Spectrum Analysis (RSA) and Time History Analysis (THA) using actual ground motion records. Response parameters, such as time period, storey displacement, storey drift, base shear, joint displacement, and joint acceleration, are evaluated. The findings indicate that shear wall configuration enhances the stiffness of structures, resulting in higher seismic force demands. FVDs proved more effective for short-duration, high-frequency near-field events, whereas LRBs were better suited to long-duration far-field motions by shifting the structure's natural period. LRB systems increased the time period to 3.8 seconds, effectively reducing seismic demand. Under far-field earthquakes, LRBs reduced displacements and drifts by up to 36.2%, while FVDs were more effective in near-field with rapid energy dissipation. Base shear dropped by up to 43% and 23% using LRB and FVD, respectively. Among all, the combined FVD+LRB system exhibited the most efficient response reduction, benefiting from both energy dissipation and isolation mechanisms. The results highlight the potential of integrating passive control systems to enhance the earthquake resistance of residential buildings significantly.