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Seismic Loss Assessment and Mitigation for Critical Urban Infrastructure Systems

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Title: Seismic Loss Assessment and Mitigation for Critical Urban Infrastructure Systems
Author(s): Kim, Young-Suk; Spencer, Jr., Billie F.; Elnashai, Amr S.
Subject(s): seismic risk infrastructure interdependent network retrofit strategy optimization
Abstract: Transportation and utility networks (e.g., water delivery, power, and oil systems) are essential in the support of all economic and social activity of an industrialized region. The functional loss of this critical urban infrastructure due to internal or external perturbations, such as earthquakes, can severely impact commercial and industrial activities on regional, national, and international scales, and on rapid and effective emergency response and repair operations following the event. Therefore, understanding the influence of hazards on these infrastructure systems and allocation of limited resources for seismic retrofitting components of infrastructure systems are critical to mitigate damage and to perform effective response and recovery efforts. This study develops an approach for estimating seismic performance of complex critical urban infrastructures and optimizing seismic retrofit of infrastructure systems based on system-level performance under the constraint of finite resources. First, postearthquake system performance of interdependent or independent infrastructure systems is assessed based on a state-of-the-art network analysis model. Subsequently, a novel optimization algorithm is developed to determine the best retrofit strategy to maximize system performance with a limited budget. The developed methodology is applied to substantial infrastructure systems for seismic loss estimation and mitigation study. The resulting output of the methodology can provide useful insight to assist in prioritizing components of infrastructure systems for seismic retrofit to enhance their post-earthquake functionality.
Issue Date: 2008-01
Publisher: Newmark Structural Engineering Laboratory. University of Illinois at Urbana-Champaign.
Series/Report: Newmark Structural Engineering Laboratory Report Series 007
Genre: Technical Report
Type: Text
Language: English
ISSN: 1940-9826
Publication Status: published or submitted for publication
Rights Information: Copyright held by the authors. All rights reserved.
Date Available in IDEALS: 2008-03-27

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