International Journal of Science, Engineering and TechnologyAuthors: Satakshi Marskole, Deepesh Malviya
Abstract: Seismic performance of mid-rise reinforced concrete buildings is strongly influenced by structural configuration, regularity, and the adopted lateral load-resisting systems. This study presents a comparative seismic behavior analysis of a G+9 reinforced concrete building founded on soft soil and located in Seismic Zone V as per IS 1893 (Part 1):2016. Three structural configurations are considered: (i) a regular symmetrical building with bracing and base isolation, (ii) an irregular hybrid building with bracing and base isolation, and (iii) an irregular building with bracing but without base isolation. Numerical modeling and dynamic analysis are carried out using ETABS software. 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 regularity significantly enhances stiffness and reduces displacement and overturning effects, while base isolation effectively reduces 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 balance between force reduction, deformation control, and structural safety.
DOI: http://doi.org/10.5281/zenodo.18184644
