Abstract
Functionality of an infrastructure is its ability to provide its intended services. Maintaining an acceptable level of infrastructure functionality, particularly for critical infrastructure, following an extreme event is vital for effective community recovery. Estimating functionality depends on proper quantification of losses, which requires accurate assessment of infrastructure damage. The damage is presented in the form of fragility functions that are generally developed using nonlinear finite element analysis. To date, no study has been conducted to assess the effect of modeling approach on seismic fragilities of an infrastructure, the associated losses, and functionality reduction. In addition, existing frameworks for estimating functionality of critical infrastructure, such as a hospital, following an extreme event have not considered the interdependent relationship between a hospital and other lifelines. In this study, a new framework for evaluating immediate functionality of a hospital following an earthquake is presented. The functionality is estimated based on hospital losses that result from its sustained damage as well as damage to other lifelines on which the hospital relies. In addition, the effects of modeling resolution on the calculated fragilities, the estimated direct losses, and the associated functionality are evaluated. The hospital models vary from simplified 2-D with idealized boundary conditions to more comprehensive 3-D models that account for soil-structure interaction. The analysis shows that using simplified 2-D models that ignore soil-structure interaction could lead to non-conservative results. On the contrary, using more refined 3-D models could provide accurate estimation of the behavior, and subsequently better assessment of losses and functionality.
Recommended Citation
E. M. Hassan and H. Mahmoud, "A Framework for Estimating Immediate Interdependent Functionality Reduction of a Steel Hospital Following a Seismic Event," Engineering Structures, vol. 168, pp. 669 - 683, Elsevier, Aug 2018.
The definitive version is available at https://doi.org/10.1016/j.engstruct.2018.05.009
Department(s)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
3-D modeling; Direct losses; Fragility; Hospital; Immediate functionality; Lifeline interdependence; Soil-structure interaction; Steel frame
International Standard Serial Number (ISSN)
1873-7323; 0141-0296
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Publication Date
01 Aug 2018
Comments
National Institute of Standards and Technology, Grant 70NANB15H044