Multidimensional Performance Limit State for Hazard Fragility Functions
Publication: Journal of Engineering Mechanics
Volume 137, Issue 1
Abstract
This paper addresses an alternative methodology to calculate fragility functions that considers multiple limit states parameters, such as combinations of response variables of accelerations and interstory drifts. Limit states are defined using a generalized multidimensional limit states function that allows considering dependencies among limit thresholds modeled as random variables in the calculation of fragility curves that are evaluated as function of the return period. A California hospital is used as example to illustrate the proposed approach for developing fragility curves. The study investigates the sensitivity of the proposed approach for evaluating fragility curves when uncertainties in limit states are considered. Influence of structural and response parameters, such as stiffness, damping, acceleration and displacement thresholds, ground motion input, and uncertainties in structural modeling, are also investigated. The proposed approach can be considered as an alternative approach for describing the vulnerable behavior of nonstructural components that are sensitive to multiple parameters such as displacements and accelerations (e.g., partition walls, piping systems, etc.).
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Acknowledgments
The research leading to these results has received funding from the European Community’s 7th Framework Program (Marie Curie International Reintegration Actions—FP7/2007-2013) under the Grant Agreement No. UNSPECIFIEDPIRG06-GA-2009-256316 of the project ICRED—Integrated European Disaster Community Resilience. This research was also partially supported by the MCEER program, which is supported by NIST.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 137 • Issue 1 • January 2011
Pages: 47 - 60
Copyright
© 2011 ASCE.
History
Received: Feb 22, 2009
Accepted: Jun 28, 2010
Published online: Jun 29, 2010
Published in print: Jan 2011
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