SEISMIC DAMAGE ASSESSMENT AND RETROFITTING OF A HOSPITAL BUILDING IN WEST PASAMAN, INDONESIA

Abstract

The major earthquake that occurred on February 25, 2022, with a magnitude of 6.2 M, and aftershocks in West Pasaman, Indonesia, caused damage to many buildings, including the West Pasaman Ibnu Sina Hospital building. The stability of hospital building structures is paramount for ensuring the safety and functionality of healthcare facilities, particularly in the aftermath of disasters. To assess the feasibility of post-earthquake structures, a rapid visual assessment of the building was carried out, and it was found that there was some damage to the building. Based on the design document (as-built drawings), this reinforced concrete (RC) structure building was built in 2013 and designed using old Indonesian building standards. Therefore, further structural evaluation of the hospital building should be carried out using the current building codes. The analysis results show that structural elements of columns and beams are unable to resist working loads by applicable building standards such as seismic code (SNI 1726:2019), RC structure code (SNI 2847:2019), and minimum loads code (SNI 1727:2020). In addition, the inter-story drift of the building does not meet the requirement in the Indonesian seismic code. The recommendation for retrofitting the building structure is by adding RC shear walls to the corners of the existing building. The retrofitted building shows an increase in the structural capacity of the building. The inter-story drift and the structural elements strength of the retrofitted building have met the requirements based on the current building codes, so this building is safe to use for hospital operations.