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A platform for research: civil engineering, architecture and urbanism
Spatiotemporal interpolation of surface chloride content for marine RC structures based on non-uniform spatiotemporal Kriging interpolation method
Highlights: The scale of fluctuation for surface chloride content under varying exposure zone on marine structure. The modified spatiotemporal kriging interpolation method to re-establish the non-uniform spatiotemporal correlation distance. The optimal strategy to improve the cost benefit ratio of surface chloride content detection on RC structures.
Abstract Chloride-induced corrosion of marine reinforced concrete structures involves numerous uncertainties related to environmental exposure zone. The exposure zone is strongly correlated with surface chloride content, which exhibits significant spatiotemporal variability. In this study, the scale of fluctuation of the chloride content in different exposure zones was estimated to explore the effect of the exposure zone on the spatial variability of the marine chloride environment. Based on the detection data of surface chloride content over a time span of 18 years at Zhapu Port, we present a modified spatiotemporal Kriging interpolation method that extends interpolation from 2D plane to 3D space by replacing surface distance with the Euclidean distance. The chloride environmental spatiotemporal distance field model was constructed using the particle swarm optimization algorithm. The results show that the prediction of surface chloride content is physically more realistic when modified spatiotemporal Kriging is used with the spatiotemporal distance amplified by 2–3 times. Additionally, a method to optimise the location of the detection point is proposed, which can improve the cost–benefit ratio of surface chloride content detection on reinforced concrete structures by 37.5%.
Spatiotemporal interpolation of surface chloride content for marine RC structures based on non-uniform spatiotemporal Kriging interpolation method
Highlights: The scale of fluctuation for surface chloride content under varying exposure zone on marine structure. The modified spatiotemporal kriging interpolation method to re-establish the non-uniform spatiotemporal correlation distance. The optimal strategy to improve the cost benefit ratio of surface chloride content detection on RC structures.
Abstract Chloride-induced corrosion of marine reinforced concrete structures involves numerous uncertainties related to environmental exposure zone. The exposure zone is strongly correlated with surface chloride content, which exhibits significant spatiotemporal variability. In this study, the scale of fluctuation of the chloride content in different exposure zones was estimated to explore the effect of the exposure zone on the spatial variability of the marine chloride environment. Based on the detection data of surface chloride content over a time span of 18 years at Zhapu Port, we present a modified spatiotemporal Kriging interpolation method that extends interpolation from 2D plane to 3D space by replacing surface distance with the Euclidean distance. The chloride environmental spatiotemporal distance field model was constructed using the particle swarm optimization algorithm. The results show that the prediction of surface chloride content is physically more realistic when modified spatiotemporal Kriging is used with the spatiotemporal distance amplified by 2–3 times. Additionally, a method to optimise the location of the detection point is proposed, which can improve the cost–benefit ratio of surface chloride content detection on reinforced concrete structures by 37.5%.
Spatiotemporal interpolation of surface chloride content for marine RC structures based on non-uniform spatiotemporal Kriging interpolation method
Wu, Ren-jie (author) / Xia, Jin (author) / Chen, Ke-yu (author) / Chen, Jie-jing (author) / Liu, Qing-feng (author) / Jin, Wei-liang (author)
Structural Safety ; 103
2023-02-20
Article (Journal)
Electronic Resource
English
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