Risk assessment of bridges using Fuzzy Logic Controller

Jelena Andric, Dagang Lu

Research output: Chapter in Book or Report/Conference proceedingConference Proceedingpeer-review

2 Citations (Scopus)

Abstract

Bridges are very important elements of infrastructure systems. During the operation period, bridges are exposed to various risks which will cause damage and/or collapse of structures. In this paper, a risk assessment model for bridges is proposed based on fuzzy logic theory, so that it can be adapted by practicing engineers in bridge risk assessment. Fuzzy logic is suitable for dealing with uncertainties because of its robustness. For estimating damage levels of bridges, a fuzzy logic controller is developed in this paper. The controller is implemented under the NetBeans IDE 7.0.1 environment. Risk sources which influence bridge functionality are identified by collecting and analyzing data of collapsed bridges. Many factors are important for risk assessment, but it is hard to quantify them because of the different opinions by experts. In this study, sixteen identified risks which have influences on bridge damage are used. The identified risks are taken as input variables to the fuzzy logic controller. Each input variable has been estimated through the experts' questionnaire. The output is the bridge damage level which might be minor, moderate and major. For the case study, a single-tower cable-stayed bridge located in Tianjin, China was chosen. According to results of the program, the expected bridge damage was moderate. It is demonstrated by this example that the developed approach in this paper can be effectively applied in practical risk assessment of bridges under different hazards considering the opinions of experts.

Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Structural Dynamics, EURODYN 2014
EditorsA. Cunha, P. Ribeiro, E. Caetano, G. Muller
PublisherEuropean Association for Structural Dynamics
Pages3073-3078
Number of pages6
ISBN (Electronic)9789727521654
Publication statusPublished - 2014
Externally publishedYes
Event9th International Conference on Structural Dynamics, EURODYN 2014 - Porto, Portugal
Duration: 30 Jun 20142 Jul 2014

Publication series

NameProceedings of the International Conference on Structural Dynamic , EURODYN
Volume2014-January
ISSN (Print)2311-9020

Conference

Conference9th International Conference on Structural Dynamics, EURODYN 2014
Country/TerritoryPortugal
CityPorto
Period30/06/142/07/14

Keywords

  • Bridge
  • Damage
  • Fuzzy controller
  • Fuzzy logic
  • Membership functions
  • Risk assessment

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