A data-driven structural damage identification approach using deep convolutional-attention-recurrent neural architecture under temperature variations

In recent years, by emerging deep learning (DL) based algorithms, researchers have been exploring DL-based models to identify structural damage through data-driven approaches. DL-based data-driven techniques using autonomous feature extraction from raw sequential data are more robust under environmental variations. Extraction of robust features while considering the sequential dependencies will significantly improve the ac-curacy of damage identification by these techniques. In this regard, various architectures of DL-based models have been proposed. This study presents a novel DL-based model that utilizes both one-dimensional convolutional neural network (1DCNN) and recurrent neural network (RNN) variants using an attention mechanism. Attention mechanism improves the performance of the 1DCNN-RNN variants model precisely when its input data is raw acceleration time-history, as a kind of sequential data. The IASC-ASCE phase II and Qatar University grandstand simulator benchmarks are used to evaluate the proposed model by comparing its performance with DL-based neural network architectures that could be equivalent to this combination. Moreover, the environmental variable which affects structural response is also examined. Results demonstrate that the CNN-ATT-biGRU model ar-chitecture has the best accuracy and appropriate training time and model size among nine compared architectures.

Automated summary

In recent years, researchers have been using deep learning (DL) based algorithms to identify structural damage through data-driven approaches. The use of DL-based models with autonomous feature extraction from raw sequential data provides more robust results under environmental variations. This study proposes a novel DL-based model that combines 1D Convolutional Neural Network (1DCNN) and recurrent neural network (RNN) variants using an attention mechanism. The CNN-ATT-biGRU model architecture demonstrates the best accuracy and suitable training time and model size among the compared architectures.