Behavioral Analysis Of G+9 Reinforced Concrete Buildings With Different Structural Configurations Under Severe Seismic Conditions

Seismic performance of mid-rise reinforced concrete buildings is strongly influenced by structuralconfiguration, regularity, and the adopted lateral load-resisting systems. This study presents a comparative seismicbehavior analysis of a G+9 reinforced concrete building founded on soft soil and located in Seismic Zone V as perIS 1893 (Part 1):2016. Three structural configurations are considered: (i) a regular symmetrical building with bracingand base isolation, (ii) an irregular hybrid building with bracing and base isolation, and (iii) an irregular buildingwith bracing but without base isolation. Numerical modeling and dynamic analysis are carried out using ETABSsoftware. The structural response is evaluated in terms of storey displacement, storey drift, storey shear, base shear,and overturning moment under critical seismic load combinations. The results indicate that structural regularitysignificantly enhances stiffness and reduces displacement and overturning effects, while base isolation effectivelyreduces seismic forces and inter-storey drift at the cost of increased overall displacement. For irregular buildings,the combined use of bracing and base isolation provides superior seismic performance, offering an optimal balancebetween force reduction, deformation control, and structural safety.