SEISMIC PERFORMANCE EVALUATION OF MULTISTORIED RC BUILDING USING PUSHOVER ANALYSIS WITH DISPLACEMENT COEFFICIENT AND CAPACITY SPECTRUM METHODS

In the realm of civil engineering, the seismic response of reinforced concrete is one of the crucial aspects that may ensure structural safety under seismic loading. This study evaluates the seismic response of the four-storied RC moment-resisting frame under the guidance of FEMA-273, FEMA-356, and ATC-40. The structure was modeled in ETABS with plastic hinges at the beam and column ends, considering material and geometric nonlinearities (P-δ, P-Δ effects). Capacity curve and hinge progression were asserted to analyse the performance level, i.e., Life Safety (LS), Collapse Prevention (CP), and Immediate Occupancy (IO). To validate the results, manual calculations were done in parallelly using the Capacity Spectrum Method (CSM) and the Displacement Coefficient Method (DCM) as per code ASCE 41-17. The evaluated results emphasise the intensity of consistency when compared to the software outputs, and additionally indicate the framework that exhibits adequate ductility and energy dissipation, satisfying IO and LS under design-level earthquakes and CP under maximum considered events. The framework confirms that pushover analysis, when complemented by simplified manual methods, provides a practical and robust approach for assessing seismic performance and planning retrofits of RC buildings. The outcomes of this study not only reinforce the reliability of nonlinear static procedures but also underscore their relevance in performance-based seismic design frameworks.