Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27603
Title: Damage localization of cable-supported bridges using modal frequency data and probabilistic neural network
Authors: Zhou, XT
Ni, YQ 
Zhang, FL
Issue Date: 2014
Publisher: Hindawi Publishing Corporation
Source: Mathematical problems in engineering, 2014, v. 2014, 837963 How to cite?
Journal: Mathematical problems in engineering 
Abstract: This paper presents an investigation on using the probabilistic neural network (PNN) for damage localization in the suspension Tsing Ma Bridge (TMB) and the cable-stayed Ting Kau Bridge (TKB) from simulated noisy modal data. Because the PNN approach describes measurement data in a Bayesian probabilistic framework, it is promising for structural damage detection in noisy conditions. For locating damage on the TMB deck, the main span of the TMB is divided into a number of segments, and damage to the deck members in a segment is classified as one pattern class. The characteristic ensembles (training samples) for each pattern class are obtained by computing the modal frequency change ratios from a 3D finite element model (FEM) when incurring damage at different members of the same segment and then corrupting the analytical results with random noise. The testing samples for damage localization are obtained in a similar way except that damage is generated at locations different from the training samples. For damage region/type identification of the TKB, a series of pattern classes are defined to depict different scenarios with damage occurring at different portions/components. Research efforts have been focused on evaluating the influence of measurement noise level on the identification accuracy.
URI: http://hdl.handle.net/10397/27603
ISSN: 1024-123X
EISSN: 1563-5147
DOI: 10.1155/2014/837963
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