Study and time History Analysis of G+12 RCC Hospital Building in Seismic Zone III using ETABS
Keywords:
Seismic retrofitting, RC jacketing, storey displacement, base shear, ETABS analysisAbstract
This research evaluates the seismic performance of a G+12 reinforced concrete hospital building in Seismic Zone III (Zone Factor 0.16) using ETABS software. Three structural configurations are compared: the existing conventional structure, the structure retrofitted with steel bracing, and the structure retrofitted with RC jacketing. Parameters such as base shear, storey displacement, storey shear, storey stiffness, and natural frequency are analysed. Results show that RC jacketing yields the highest base shear (1051.98 kN), the lowest top-storey displacement (12.067 mm), and the greatest improvement in stiffness and natural frequencies, outperforming bracing in all aspects. Both retrofitting techniques significantly enhance lateral load resistance and seismic resilience compared to the existing condition. The study confirms that even in moderate seismic zones, retrofitting is essential for life safety and damage control. RC jacketing is recommended as a highly effective member-level retrofitting strategy for multi-storey RC frames.
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