Damage and loss probability assessment of reinforced concrete building due to Yogyakarta earthquake scenario using pushover and hazus analysis (case study: student center building, faculty of social science, UNY)

Abstract

Yogyakarta is one of the cities in Indonesia prone to earthquake. The Student Center Building, Faculty of Social Science (FSS), Universitas Negeri Yogyakarta (UNY) was built in 2012 using the earthquake code of 2002. Seismic vulnerability assessment of the building due to the newest seismic code is essential to do as one of earthquake disaster mitigation efforts. The study aimed to determine the seismic building performance level based on ATC-40 criteria, damage probability matrix using HAZUS method, and damage loss economic value of the building based on FEMA-1999. The research begins by modelling building structures in 3D followed by performing pushover analysis then calculate the probability of building damage based on HAZUS method. The results show that the building is included in the Immediate Occupancy (IO) performance level which means that if an earthquake happens, only a little structural damage occurs. The total vulnerability value based on the HAZUS method analysis reached 48.12%, in which the probability of damage for the slight, moderate, extensive and complete level reached 22.59%, 21.60%, 3.71% and 0.23% respectively. In addition, the damage economic value obtained is 4.692% means that the building has a small damage economic probability due to the 2006 Yogyakarta earthquake scenario.