Seismic Vulnerability Assessment, Non-Linear Pushover Analysis, and Performance-Based Design Optimization of Multi-Story Reinforced Concrete Framed Structures with Structural Shear Walls

Abstract

Rapid urbanization and vertical densification in seismically active zones necessitate the structural design of robust framing systems capable of resisting severe lateral earthquake forces without catastrophic collapse. Conventional reinforced concrete (RC) moment-resisting frames frequently suffer from excessive lateral drift, P-delta effects, and torsional irregularities when subjected to high-magnitude seismic ground motions. This research evaluates the seismic vulnerability, plastic hinge formation hierarchy, and performance-based design optimization of multi-story RC framed structures integrated with strategically positioned structural shear walls. Utilizing advanced finite element software, non-linear static pushover analyses and dynamic time-history simulations were conducted on 12-story building models designed in compliance with Indian Standard IS 1893 (Part 1): 2016. The analytical results demonstrate that incorporating reinforced concrete shear walls effectively controls maximum inter-story drift ratios, reduces bending moment and shear demands on peripheral columns, and redirects seismic energy dissipation uniformly across structural members. Performance-based plastic hinge state distributions confirm superior structural resilience and ductility capacity under maximum considered earthquake (MCE) events.