International Journal of Science, Engineering and TechnologyAuthors: Kuldeep Pathak
Abstract: Symmetrical buildings are generally regarded as structurally stable under seismic loading due to their balanced geometry and uniform distribution of mass and stiffness. However, increasing building height introduces complex dynamic behavior, including higher time periods, inter-storey drift, and lateral displacements, even in geometrically regular structures. This study evaluates the seismic response of symmetrical reinforced concrete (RC) buildings of three height categories—G+3, G+7, and G+10—modeled using STAAD.Pro and analyzed under IS 1893 (Part 1): 2016 seismic provisions for Zone IV conditions in India. Key performance indicators such as fundamental time period, base shear, maximum storey drift, and lateral displacement were assessed. Results indicate that while symmetry ensures predictability and torsional stability, increased height leads to significant amplification of seismic effects. Notably, mid- and high-rise models exceeded the allowable drift limits specified by the code, requiring supplementary lateral-resisting systems. The study also evaluates material efficiency by comparing concrete and steel usage across models. Findings emphasize the need for integrated seismic design strategies that consider both geometric regularity and height-induced vulnerabilities.
DOI: https://doi.org/10.5281/zenodo.18204691
