考虑氯离子侵蚀维度的钢筋混凝土码头服役寿命预测

doi:10.11896/cldb.20120229

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Abstract Reasonable assessment and prediction on the durability and service life of reinforced concrete (RC) wharf structures exposed to marine environment considering the influence of chlorine erosion is of great significance to the normal and safe operation of ports. For this paper's study, taking into account the meso-scopic structure of concrete multi-phases composites, the meso-scopic numerical models of concrete with convex polygon coarse aggregates were established. Based on the numerical simulation using finite element method for chloride erosion in concrete, the chloride concentration profiles due to one-dimensional and two-dimensional chloride erosion in meso-scopic numerical model of concrete were determined. The one-dimensional and two-dimensional chloride erosion models were built. Taking the square pile in a certain RC high-piled wharf as an example, the service life of square pile component was predicted and obtained by using the established one-dimensional and two-dimensional chloride erosion models and uniting the corrosion rate model of reinforcement. Results indicated that the prediction service life of RC square pile under two-dimensional chloride erosion was about 34% earlier than that of one-dimensional chloride erosion, the service life of RC structures greatly shortening. To ensure the long-term operation safety of RC wharf structure, the influence of chloride erosion dimension on the service life of RC wharf should be fully considered during the durability design.

Key words： reinforced concrete (RC) wharf chloride erosion dimension service life

Published: 25 December 2021 Online: 2021-12-27

CLC number:

TU375

Fund:This work was financially supported by the Chongqing Postdoctoral Science Foundation (cstc2019jcyj-bshX0063), the China Postdoctoral Science Foundation (2019M653824XB), the Innovative Research Program for Graduate Students at CQJTU (CYS21350).

About author: Xueli Jureceived her bachelor's degree from Chongqing Jiaotong University in 2019. She is studying for her Ph.D. degree at Chongqing Jiaotong University and focusing on the research directions of reinforced concrete durability, etc.

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	JU Xueli
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	LI Tingting

Cite this article:

JU Xueli,WU Linjian,LIU Mingwei, et al. Service Life Prediction for Reinforced Concrete Wharf Considering the Influence of Chloride Erosion Dimension[J]. Materials Reports, 2021, 35(24): 24075-24080.

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http://www.mater-rep.com/EN/10.11896/cldb.20120229 OR http://www.mater-rep.com/EN/Y2021/V35/I24/24075

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