BIM-BASED SEISMIC RISK ASSESSMENT FRAMEWORK FOR INFRASTRUCTURE SYSTEMS Alon Urlainis 1 , Amichai Mitelman 1 , Shabtai Isaac 2 1 Department of Civil Engineering, Ariel University, Ariel, Israel 2 Department of Civil and Environmental Engineering, Ben Gurion University of the Negev, Beer Sheva, Israel Abstract Building information modeling (BIM) methodology has been widely adopted for engineering projects, such as buildings, bridges, pipelines, and roads. However, BIM has yet to be fully utilized for risk assessment of critical facilities with multiple infrastructure systems. In this study, a BIM-based seismic risk assessment framework is proposed. The digital BIM model contains component-level information on the building's structural and non-structural elements, and this digital data allows the execution of component-based analysis of seismic risk. The seismic vulnerability of the components can be evaluated according to fragility curves, where each model element is attributed its corresponding fragility parameters. Each model element is assigned the median and standard deviation capacity for each damage state. Subsequently, various seismic scenarios can be simulated. The results of the simulations allow quick assessment of the seismic performance of the infrastructure and identifying the most vulnerable components. The proposed framework provides a valuable tool for engineers and decision-makers in assessing the seismic risk of infrastructures and implementing necessary measures to increase their resilience. Our preliminary work shows that BIM can provide valuable information and visualization tools for seismic risk assessment and can help improve the efficiency of the assessment process. © 2023 The Authors. Published by Diamond Congress Ltd. Peer-review under responsibility of the scientific committee of the Creative Construction Conference 2023. Keywords: Building information modeling (BIM), Seismic risk assessment, Infrastructure, Fragility curves, Vulnerability. 1. Introduction Over the past few decades, modern societies have become increasingly dependent on critical infrastructures (CIs) to function properly continuously, particularly during extreme and hazardous events [1], [2]. Extreme events can cause significant damage to these infrastructures, resulting in severe economic and human impacts. The impacts of seismic events on structures and infrastructure systems can be significant and widespread, affecting not only the physical structures themselves but also the surrounding environment and communities [1]. Common examples of CIs are listed in Table 1. These CIs regularly consist of several structural and non-structural components that include utilities, HVAC systems (Heating, ventilation, and air conditioning), generators, fire alarm systems, and more. Each component responds differently to a given Proceedings of the Creative Construction Conference (2023) Edited by: Miroslaw J. Skibniewski & Miklos Hajdu https://doi.org/10.3311/CCC2023-074 Keszthely, Hungary 20-23 June 2023 573