Real-time damage identification of discrete structures via neural networks subjected to dynamic loading

Sajad Javadinasab Hormozabad, Mariantonieta Gutierrez Soto

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

Abstract

Effective Damage Identification (DI) plays a critical role in protecting structures against local or global failures caused by hazards. Real-time DI provides instant damage data and increases the safety and serviceability of civil structures. Real-time DI helps to understand the structure's behavior during extreme events that may be unknown at the design stage. This field needs innovative solutions for training supervised machine learning classifiers in the absence of measured damaged data. This research proposes an unconventional deep learning algorithm for vibration-based DI. The proposed real-time data-driven DI methodology does not require any manual feature extraction and uses Artificial Neural Networks (ANNs) to identify the presence and location of damage in discrete structural systems. The input is the response signals measured through sensors (no model-based input information required). A dropout technique regularizes the network and avoids co-adaptation in hidden layers. The neural network is optimized through 10-fold cross-validation. The proposed method's effectiveness in identifying the presence and location of damages is studied using a 4-story 2D structure subjected to artificial accelerograms. The recorded response signals create the feature space in the dataset. The lateral stiffness of columns is reduced randomly by different percentages resembling different damage severities. Considering the validation dataset results, the accuracy of the damage detection task varies from 84 to 99% for different damage severities, and accuracy for the localization task ranges from 78-98%. The results show the promising performance of ANNs for real-time DI and pave the way for training the classifiers using real-life data from undamaged structures and simulate data from damage scenarios.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems XV
EditorsPaul Fromme, Zhongqing Su
PublisherSPIE
ISBN (Electronic)9781510640153
DOIs
StatePublished - 2021
EventHealth Monitoring of Structural and Biological Systems XV 2021 - Virtual, Online, United States
Duration: Mar 22 2021Mar 26 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11593
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceHealth Monitoring of Structural and Biological Systems XV 2021
Country/TerritoryUnited States
CityVirtual, Online
Period3/22/213/26/21

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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