Seismic damage recognition of structural and non-structural components based on convolutional neural networks

Image-based rapid recognition of seismic damage of structural and non-structural components is significant for the emergency response and recovery decision making in the post-earthquake environment. A novel seismic damage rapid recognition method of structural and nonstructural components based on convolutional neural networks (CNNs) is proposed in this study. Firstly, a seismic damage image dataset of reinforced concrete (RC) frame structural and non-structural components is built. Secondly, the damage recognition method of transfer learning (TL)-based AlexNet is proposed, which is proven to be superior through the contrast experiment with GoogLeNet and ResNet. Based on it, the optimal ceiling damage recognition model with an accuracy of over 93 % is established through studying the hyperparameters. Thirdly, an improved TL-based AlexNet is proposed to further enhance the accuracy of identifying seismic damage to components, achieving optimal recognition accuracies of 91.0 %, 95.5 %, and 80.8 % for beams and columns, ceilings, and infill walls, respectively. Finally, a graphical user interface (GUI) is designed and developed to break down professional barriers and broaden the user base. This study realizes the goal of damage recognition of multiple components of structures rationalistically and normatively.