Assessment of an Eight-Story Hospital Building with Nonlinear Static Analysis

The assessment of an existing eight-story reinforced concrete (RC) hospital building, built in 2011, was measured using Non-linear Static Analysis Procedures (NSAP). The research examines the performance of the building and its respond to the earthquake’s magnitude increment, in accordance with SNI 1726:2019 [1]. The NSAP has been performed and tested using ETABS software, which uses incremental lateral forces, positioned at the performance points, to determine the level of performance during failure conditions under 3 distinct conditions, such as yield conditions, local failure conditions and global failure conditions. Performance-based seismic design regulates the RC performance, to prevent potential hazards and actual building response according to the applicable regulations. The NSAP analysis phase begins with specifying the performance objectives, identification of the existing design, and conduct assessment appropriately and finally resume the RC’s performance accordingly. The analysis reveals the performance level condition at the RC’s performance point, when it reaches the performance level both in X direction and Y direction the structure experiences local collapse which is considered as Collapse Prevention (CP) condition. The response of the structure indicates that the plastic hinges mechanism occurs both in the beam and the column as well at the 1st floor up to the roof floor. The structure is more ductile in the Y-direction compared to the X direction. The research has stated that the reinforced concrete structure possesses appropriate ductility, the failure condition is elastic in the collapse prevention category and meets the performance-based design criteria.