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对国内外冻融环境下混凝土结构耐久性研究现状及发展趋势进行了系统的总结及归纳,并对该领域未来研究方向进行了展望.基于对国内外文献的研读与分析,首先对冻融环境下混凝土的破坏机理、冻融试验方法和标准进行了归纳与梳理;并分别从理论研究及数值模拟方法上对非预应力混凝土结构、预应力混凝土结构耐久性研究方法进行归纳总结,同时提出增强混凝土抗冻性能的对策措施,最后分析了未来冻融环境下混凝土结构的耐久性研究趋势.研究表明:针对冻融环境作用下混凝土结构耐久性研究已取得一定的研究成果,但基于大尺寸预应力构件开展的冻融环境作用下的耐久性研究尚未见报道,应作为下一步重点研究的方向.
This paper summarizes and summarizes the research status and development trend of the durability of concrete structures both in domestic and abroad in the freezing and thawing environment and prospects the future research directions in this field.After studying and analyzing the literature both at home and abroad, Under the destruction of the mechanism of freezing and thawing test methods and standards were summarized and combed; and respectively from the theoretical and numerical methods on non-prestressed concrete structures, prestressed concrete structure durability research methods are summarized, at the same time proposed to enhance Finally, the trend of research on the durability of concrete structures in the future freeze-thaw environment has been analyzed.The results show that the research on the durability of concrete structures under the action of freeze-thaw environment has made some achievements, but based on large size pre-treatment The research on the durability of stress members under the freeze-thaw environment has not been reported yet and should be the focus of further research.