A Group of Deterioration Curves of Bridges Estimated by Extended em Algorithm

I. Yoshida, Y. Otake, Y. Honjo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study proposes a method to separate data into several groups and perform regression analysis for each group at the same time statistically by using EM (Expectation and Maximization) algorithm or its extended formulation to nonlinear regression problem. Using the proposed method, a group of deterioration curves is estimated based on a health index database of 341 bridges by visual inspection in Gifu prefecture, Japan. The ordinary EM algorithm can only treat linear regression, so the algorithm is extended to nonlinear regression problems. In our proposed method, the hidden parameter and standard deviation of error are estimated following the ordinary EM algorithm, whereas nonlinear coefficients are estimated by using Particle Swarm Optimization-one of the global optimization methods. Deterioration curves of the four bridge groups are estimated with the inspection database by the proposed algorithm.

Original languageEnglish
Title of host publicationVulnerability, Uncertainty, and Risk
Subtitle of host publicationQuantification, Mitigation, and Management - Proceedings of the 2nd International Conference on Vulnerability and Risk Analysis and Management, ICVRAM 2014 and the 6th International Symposium on Uncertainty Modeling and Analysis, ISUMA 2014
EditorsJim W. Hall, Siu-Kui Au, Michael Beer
PublisherAmerican Society of Civil Engineers (ASCE)
Pages409-418
Number of pages10
ISBN (Electronic)9780784413609
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes
Event2nd International Conference on Vulnerability and Risk Analysis and Management, ICVRAM 2014 and the 6th International Symposium on Uncertainty Modeling and Analysis, ISUMA 2014 - Liverpool, United Kingdom
Duration: 2014 Jul 132014 Jul 16

Publication series

NameVulnerability, Uncertainty, and Risk: Quantification, Mitigation, and Management - Proceedings of the 2nd International Conference on Vulnerability and Risk Analysis and Management, ICVRAM 2014 and the 6th International Symposium on Uncertainty Modeling and Analysis, ISUMA 2014

Conference

Conference2nd International Conference on Vulnerability and Risk Analysis and Management, ICVRAM 2014 and the 6th International Symposium on Uncertainty Modeling and Analysis, ISUMA 2014
CountryUnited Kingdom
CityLiverpool
Period14/7/1314/7/16

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality

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