1 大连大学建筑工程学院,大连 116622 2 Department of Civil Engineering,University of Nebraska-Lincoln, Omaha NE 68182,USA
Numerical Simulation on Multiphase Transportation and Phase Transition in Chloride Contaminated Concrete with the Thermo-Hygro Coupled Effects
LI Rongtao1, Christopher Y. TUAN2
1 College of Civil Engineering and Architecture, Dalian University, Dalian 116622 2 Department of Civil Engineering, University of Nebraska-Lincoln, Omaha NE 68182, USA
Abstract: Corrosion of reinforcing steel due to chloride attack is one of the main causes of deterioration process for reinforced concrete structures exposed to chloride-rich environment. How to predict the chloride penetration process into concrete structures and improve the penetration resistance of concrete to various chloride sources are the most serious challenges to concrete structural engineers that they have to face. Therefore, a theoretical and computational model for chloride transport in concrete was presented. The governing equations take into account the coupled transport process of chloride ions, moisture, air and heat. This represents the actual condition of concrete structures which are always found in non-saturated and non-isothermal conditions. The fully coupled effects among chloride, moisture, and heat diffusion were considered and included in the model. The coupling parameters evaluated based on the available material models and test data were proposed and explicitly incorporated in the governing equations. Then the coupled transport equations were solved numerically by the finite element method. The validation was performed by comparing the numerical results obtained from the present model with the available test data and a good agreement was observed. And the research results will provide important reference for the anticorrosion design of concrete structures in practical engineering application.
李荣涛, Christopher Y. TUAN. 考虑热湿影响的氯盐侵蚀下混凝土中多相传输与相变模拟[J]. 材料导报, 2019, 33(18): 3043-3049.
LI Rongtao, Christopher Y. TUAN. Numerical Simulation on Multiphase Transportation and Phase Transition in Chloride Contaminated Concrete with the Thermo-Hygro Coupled Effects. Materials Reports, 2019, 33(18): 3043-3049.
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2019, Vol. 33 
