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A platform for research: civil engineering, architecture and urbanism
Detection of fatigue cracking in steel bridge girders: A support vector machine approach
This study presents an artificial intelligence approach for the detection of distortion-induced fatigue cracking of steel bridge girders based on the data provided by self-powered wireless sensors. The sensors haveaseriesofmemory gates that cancumulatively record the duration of the applied strain. The gates are activated as soon as the electrical charge generated by piezoelectric strain transducer exceeds pre-defined thresholds. In the present study, the distribution of the sensor output has been characterized by a Gaussian cumulative density function. For the analysis, extensive finite element simulations were carried out to obtain the structural response of an existing highway steel bridge girder (I-96/M-52) in Webberville, Michigan. Different damage states were defined by extending the lengths of the crack at the web gaps from10 mmto100 mm. Damage indicator features were extractedfor different data acquisition nodes based on the sensor output distribution. Subsequently, support vector machine (SVM) classifiers were developedtofuse the clustered features and identify multiple damage states. The results indicate that the models have acceptable detection performance, specifically for cracks larger than 10 mm. The best classification performance was obtained using the information from a group of sensors located near the damage zone.
Detection of fatigue cracking in steel bridge girders: A support vector machine approach
This study presents an artificial intelligence approach for the detection of distortion-induced fatigue cracking of steel bridge girders based on the data provided by self-powered wireless sensors. The sensors haveaseriesofmemory gates that cancumulatively record the duration of the applied strain. The gates are activated as soon as the electrical charge generated by piezoelectric strain transducer exceeds pre-defined thresholds. In the present study, the distribution of the sensor output has been characterized by a Gaussian cumulative density function. For the analysis, extensive finite element simulations were carried out to obtain the structural response of an existing highway steel bridge girder (I-96/M-52) in Webberville, Michigan. Different damage states were defined by extending the lengths of the crack at the web gaps from10 mmto100 mm. Damage indicator features were extractedfor different data acquisition nodes based on the sensor output distribution. Subsequently, support vector machine (SVM) classifiers were developedtofuse the clustered features and identify multiple damage states. The results indicate that the models have acceptable detection performance, specifically for cracks larger than 10 mm. The best classification performance was obtained using the information from a group of sensors located near the damage zone.
Detection of fatigue cracking in steel bridge girders: A support vector machine approach
Archiv.Civ.Mech.Eng
Hasni, Hassene (author) / Alavi, Amir H. (author) / Jiao, Pengcheng (author) / Lajnef, Nizar (author)
Archives of Civil and Mechanical Engineering ; 17 ; 609-622
2017-09-01
14 pages
Article (Journal)
Electronic Resource
English
Detection of fatigue cracking in steel bridge girders: A support vector machine approach
| British Library Online Contents | 2017
Fatigue cracking detection in steel bridge girders through a self-powered sensing concept
| Online Contents | 2017
Fatigue cracking detection in steel bridge girders through a self-powered sensing concept
| British Library Online Contents | 2017