Study on surface damage detection of RC frame joints based on deep learning and image recognition(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2026年01期
- Page:
- 41-55
- Research Field:
- 智能检测与建造技术专栏
- Publishing date:
Info
- Title:
- Study on surface damage detection of RC frame joints based on deep learning and image recognition
- Author(s):
- YANG Shuo; LENG Yubing; XU Qingfeng
- 1. School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, China; 2. Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University, Tianjin 300384, China; 3. Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Sci. Co., Ltd, Shanghai 200032, China
- Keywords:
- reinforced concrete frame joint; deep learning; Mask RCNN; surface damage detection
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to improve the efficiency of surface damage detection of reinforced concrete (RC) structures and to realize the integration of RC component surface damage localization, fine measurement and evaluation, a damage detection and assessment method based on the deep learning and image recognition was proposed for the scenario of detection of surface damage for RC frame structures. The surface damage detection model of RC frame members was established based on the mask region convolutional neural network (Mask RCNN) model and image processing. Based on the images of damage and destruction in previous RC component tests, the surface damage dataset of RC components including six types of damage, i.e. crack, spalling, crushing, rebar exposure, rebar buckling and rebar fracture, was established after cropping and data augmentation to train the model. Based on the 3D reconstruction and the damage detection model, an inspection program, which could simultaneously locate the surface damage of RC components and analyze the damage geometric parameters, was made and integrated the criteria for classifying the damage level and judging the damage pattern of RC components to quantitatively assess the damage degrees and judge the damage patterns for RC components. Two fullscale RC beamcolumn joint specimens were designed, fabricated, and used to conduct an experimental test. The damaged joint specimens were photographed with a smart phone and a small unmanned aerial vehicle (UAV) to detect the surface damage of the beams for validation of the above damage detection method. The results show that the detection results based on the smart phone are better than those based on UAV digital zoom shooting. The accuracy of the rebar buckling and fracture is poor due to the fewer training samples. When the lens is about 200 mm from the surface of the members, the measurement accuracy of crack width can reach 0.1 mm. If the measured crack width is greater than 0.5 mm, the crack width detection accuracy of the above method is higher. The damage grades (degrees) and failure patterns of components analyzed by the detection program are consistent with the observation. The damage detection method based on the deep learning and image recognition can support quantitative surface damage rapid detection and assessment for damaged or postearthquake RC frame components.
Last Update: 2026-01-20