Structural Performance Analysis in 10-Storey and 2-Storey Basement Buildings Using the Pushover Method

Abstrak

This study aims to evaluate the structural performance of a 10-story reinforced concrete residential building with two basement levels under seismic loading using the nonlinear static pushover analysis method. The research is motivated by the growing development of high-rise buildings with basement configurations in seismic zones, requiring a performance-based design approach to ensure structural safety. The theoretical foundation refers to ATC-40, FEMA 356, and the Indonesian seismic code SNI 1726:2019, which guide the determination of capacity curves, performance points, drift ratios, and structural damage levels. A quantitative analytical method was applied, and the structural model was developed using Robot Structural Analysis Professional. The loading considered includes dead load, live load, wind load, and equivalent static seismic load prior to conducting pushover analysis in both X and Y directions. The results show that the performance point in the X direction is achieved at a displacement of 179.29 mm with a base shear of 15,843.35 kN, while the Y direction reaches a displacement of 200.51 mm with a base shear of 15,479.03 kN. The maximum drift ratio of 0.004 in both directions satisfies the Immediate Occupancy (IO) performance level according to ATC-40.