Evaluation of wind fragilities of existing multi-story shear frames using maximum a posteriori estimation

Wang, Vincent Z., Ginger, John D., and Henderson, David J. (2013) Evaluation of wind fragilities of existing multi-story shear frames using maximum a posteriori estimation. In: Proceedings of the 2013 World Congress on Advances in Structural Engineering and Mechanics, pp. 796-804. From: ASEM 2013: World Congress on Advances in Structural Engineering and Mechanics, 8-12 September 2013, Jeju, South Korea.

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Abstract

Wind fragility analysis provides a quantitative instrument for delineating the safety performance of civil structures under hazardous wind loading conditions such as cyclones and tornados. It has attracted and would be expected to continue to attract intensive research spotlight particularly in the nowadays worldwide context of adapting to the changing climate. One of the challenges encumbering efficacious assessment of the safety performance of existing civil structures is the possible incompleteness of the structural appraisal data. Addressing the issue of the data missingness, the study presented in this paper forms a first attempt to investigate the feasibility of using the expectation-maximization (EM) algorithm and Bayesian techniques to predict the wind fragilities of existing civil structures. A numerical example of a multi-story shear frame is introduced with the wind loads derived from a widely used power spectral density function. Specifically, the application of the maximum a posteriori estimates of the distribution parameters for the story stiffness is examined.

Item ID: 28991
Item Type: Conference Item (Refereed Research Paper - E1)
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ISBN: 978-89-89693-37-6
Date Deposited: 18 Mar 2014 03:42
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 100%
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