Seismic Risk Assessment of Bridges in Jakarta Transportation Networks using Incremental Dynamic Analysis

Jakarta is known as the most populated as well as most traffic-congested among capital cities in the world. The development of infrastructure facilities, such as bridge, is carried out to meet the high demand. Since the latest Indonesian Seismic Code has been released, retrofitting of existing bridges becomes an issue therefore it is important to investigate the performance of existing bridges under seismic catastrophe compared to corresponding design earthquake. To mitigate the condition and seismic risk of some vital bridges of Jakarta transportation, a simple procedure developed based on probabilistic approach. Incremental Dynamic Analysis is performed to have nonlinear response history by using artificial site-specific earthquake ground motion. The post- earthquake response is utilized to determine bridge damage level under various ground motion intensities. Seismic risk map is developed to classify the most critical bridge under earthquake and priorities the rehabilitation program according to its performance level.