Unveiling the Seismic Performance of High-Rise Buildings: A Comprehensive Study Using Capacity Spectrum Method and Response Spectrum Analysis

This research outlines the methodology for assessing the seismic performance of high-rise structures utilizing the capacity spectrum method. A three-dimensional analytical model of thirty-story buildings has been developed, encompassing regular and irregular configurations, and analyzed with the structural analysis software ETABS. The analytical model incorporates all critical elements that affect the structure’s mass, strength, stiffness, and deformability. To evaluate the impact of concrete core walls and shear walls positioned at various locations during seismic events, seismic analyses employing linear static, linear dynamic, and non-linear static procedures have been conducted. The deflections at each story level have been compared through the Response Spectrum Method, which was utilized to ascertain the capacity, demand, and performance levels of the selected building models. The findings indicate that the non-linear Response Spectrum Method offers a reliable estimate of both global and local inelastic deformation demands, highlighting design vulnerabilities that may not be apparent in elastic analyses, as well as the overall performance level of the structure. The story drifts were found to be within the limits established by the relevant code (IS: 1893-2002) when applying the Response Spectrum Method.