Superstructure Superstructure Analysis Under Earthquake Loads Using the Pushover Analysis Method

A Case Study of the Ji’rona Building Project, ’Aisyiyah Hospital Bojonegoro

Abstract

This research evaluates the seismic performance of the superstructure of Gedung Ji’rona ‘Aisyiyah Bojonegoro Hospital under earthquake loads using the Pushover Analysis Method with SAP2000 V.24 software. Referring to SNI 1726:2019 and ATC-40, the main objective is to determine the structural performance level and collapse pattern. The analysis results show that the building achieved a Damage Control (DC) performance level. This means the structure is capable of resisting total collapse from an earthquake, but will sustain significant damage requiring repair. The maximum total displacement in the Y-Y direction reached 365.641 mm, with a displacement ratio of 0.012, and an inelastic displacement of 0.011. The identified collapse pattern began with the formation of plastic hinges in beams on floors 3 to 7, followed by columns on the ground floor. This pattern indicates the desired strong column-weak beam mechanism, where beams yield first. However, some columns showed critical performance, approaching Collapse Prevention, especially in the Y-Y direction. The X-X direction exhibited stiffer and less responsive behavior.