SEISMIC BEHAVIOUR OF MULTI-STORY BUILDINGS ON SLOPING GROUND: AN EVALUATION OF RESPONSE SPECTRUM AND STATIC ANALYSIS FOR STRUCTURAL OPTIMIZATION

Abstract

This paper evaluates the seismic behavior of multi-story RCC buildings on sloping terrain, focusing on a comparative
analysis between Response Spectrum and Static Analysis methods. Multi-story buildings on sloping ground experience
complex seismic forces due to irregular mass and stiffness distributions, leading to higher vulnerability during seismic
events. In this study, various building configurations, including unbraced and braced frames at different slope angles (0°,
10°, 20°, and 30°), are analyzed to assess their structural response. Using ETABS software, the dynamic properties such
as displacement, drift, and base shear are calculated under both linear static and dynamic loading conditions, following the
IS 1893:2016 guidelines. The results reveal that braced structures show improved seismic performance, particularly in
terms of displacement and drift reduction, across all slope angles. The Response Spectrum analysis highlights the dynamic
behavior of the buildings more accurately than the static method, particularly in higher slope configurations. This research
underscores the importance of incorporating bracing systems and optimizing structural designs to enhance the seismic
resilience of buildings in hilly regions.