Farhan Firana Febrival (1), Muhammad Fauzan (2), Erizal (3), Heriansyah Putra (4)
Indonesia is position at the convergence of four active tectonic plates along the Pacific Ring of Fire makes it one of the most seismically active countries in the world, placing educational facilities with high occupant density at significant risk during seismic events. Seismic performance studies on Bogor's expansion-jointed educational buildings under SNI 1726:2019 remain limited and critically needed. This study evaluates the seismic performance of the SMK–SMAK Bogor Education Office Building, which is structurally divided into three independent units (Buildings 1, 2, and 3) by two expansion joints, each employing a Special Moment Resisting Frame system. Both linear response spectrum analysis per SNI 1726:2019 and nonlinear static pushover analysis using the ATC-40 Capacity Spectrum Method were performed in ETABS, with foundations modeled as fixed supports focusing solely on superstructure behavior. All three buildings satisfy the 90% cumulative mass participation requirement by the 5th mode, and scaled dynamic base shear complies with the Vdynamic ≥ Vstatic criterion. Inter-story drift remains below the 2% allowable limit for Risk Category II. Performance level assessment places most structures at Immediate Occupancy, except Building 2 in the Y direction which reaches Life Safety. Ductility ratios range from 2.45 to 3.90 across all units, except Building 2 in the X direction which yields a ratio of 1.95, indicating low ductility and vulnerability to brittle failure. All buildings are deemed safe and operational following a design level seismic event; however, Building 2 in the X direction requires targeted structural strengthening to improve its seismic reliability.
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