寒区水工混凝土冻融损伤及其防控研究进展

摘要/Abstract

摘要： 混凝土作为水利与水电工程重要的构筑材料,在寒冷地区受到冻融循环作用,易诱发损伤和破坏,使结构性能劣化,影响结构功能的发挥和使用寿命。在对水工混凝土冻融病害案例进行统计阐述的基础上,重点从水工混凝土冻融理论、试验、数值仿真以及冻融损伤识别和冻融病害抑制与修复等方面,论述了水工混凝土冻融损伤的研究现状和存在的问题。认为今后应加强多损伤因素耦合作用下的水工混凝土多尺度冻融劣化机理研究,改进冻融试验方法,构建合适的水工混凝土冻融损伤本构模型,开发有效的三维跨尺度模型、计算方法和工具,高效实现对复杂环境下水工混凝土冻融损伤过程的精细数值模拟,以求从研究思路、方法到工程实践上形成完善的水工混凝土冻融防控理论。

关键词: 水工混凝土, 冻融损伤, 数值分析, 影响评估, 防控

Abstract: As a common aging problem caused by the extreme climate in cold region, frost damages lead the structural performance to deterioration with a high probability, especially on the damming concrete widely used in the hydropower project, evenly resulted in unpredictable damages and an adverse effect to the service life of the project. On the basis of statistics, the problems existed and research situation, emphases on the theory research, test method, numerical simulation, damage identification, suppression and monitoring inhibit repair, etc., are discussed for the research of freeze-thaw diseases on hydraulic concrete. Suggested with the study, the research of the deterioration mechanism and improved test method subjected to freeze-thaw cycles should be strengthened with the coupled action of multiple damage factors, effective 3D multi-scale model, calculation methods and tools need to be developed to realize the fine numerical simulation of the freeze-thaw diseases process of hydraulic concrete in complex environment, in order to form a complete hydraulic concrete from research ideas, methods to engineering practice freeze-thaw preventive control theory.

Key words: hydraulic concrete, frost damage, numerical analysis, impact assessment, preventive control

中图分类号:

TU528

苏怀智, 谢威. 寒区水工混凝土冻融损伤及其防控研究进展[J]. 硅酸盐通报, 2021, 40(4): 1053-1071.

SU Huaizhi, XIE Wei. Review on Frost Damages of Hydraulic Concrete in Cold Region and Its Preventive Control[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1053-1071.

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