Analytical fragility curve development of maternity and children’s M. Djamil Hospital building Padang due to earthquake and tsunami

M. Djamil Hospital is the largest public medical facility in Padang area with over 800 patient beds. The magnitude 7.6 Western Sumatra earthquake of September 30, 2009 caused the first floor of one housing outpatient services collapsed. Padang city is located in West Sumatra province which is recorded as an earthquake and tsunami prone area in Indonesia. Risk reduction strategy can be implemented by assessing the vulnerability of building through fragility curve. In this study, the fragility curve was carried out to an existing Maternity and Childrens’s M. Djamil Hospital building due to earthquake and tsunami in sequence. Building’s structural was modelled in ETABS v. 17 and analyzed by using Pushover analysis and Nonlinear Time History analysis. This structural model was subjected through a total of 40 ground motion data from El Centro, Northridge, Kobe and Padang. Each ground motion data was normalized from 0.2g to 2.0g of peak ground acceleration and continued with tsunami load. Analysis results consist of drift at yield point and structure maximum drift, which are then generated into a fragility curve based on Hazus standard. The result of earthquake fragility curve represents that the probability of slight damage level is 100%, moderate 100%, extensive 92% and collapse 5.4%. Meanwhile, earthquake-tsunami fragility curve represents the probability of slight damage level is 100%, moderate 100%, extensive 98% and collapse 11%.