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根据从材料结构到性能机理再到工程应用的研究过程,从细观模型、退化过程以及多尺度方法3个方面,对近些年细观尺度上的桥梁混凝土结构耐久性的国内外研究进行了简要综述。分析结果表明:在细观模型方面,已经发展出基于真实骨料参数的骨料模型,代表了当前该领域研究的最高水平;传统的骨料模型由于较高的模拟效率仍具有一定的应用价值;在退化过程方面,针对单一退化机理的研究已经比较成熟,而耐久性能与力学性能退化的耦合效应还有待进一步研究;针对多尺度方法的研究不仅有效提高了细观尺度上的模拟效率,同时也建立了细观尺度与工程尺度之间的联系;参数传递是多尺度方法中的一种基本手段,参数传递过程中所涉及的概率性问题以及混凝土细观模型对参数传递过程的影响仍有待进一步研究。
According to the research process from material structure to performance mechanism to engineering application, from the aspects of meso-scale model, degradation process and multi-scale method, the domestic and international research on the durability of bridge concrete structures at meso-scale in recent years A brief overview. The results show that the aggregate model based on the real aggregate parameters has been developed in the meso-scale model, which represents the highest level of research in the field at present. The traditional aggregate model still has some applications due to the high simulation efficiency In the aspect of degenerative process, the research on the mechanism of single degeneration has been relatively mature, but the coupling effect between durability and mechanical properties deserves further study. The research on multi-scale method not only effectively improves the simulation efficiency on the mesoscopic scale, But also establishes the connection between mesoscopic scale and engineering scale. Parameter transfer is a basic method in multi-scale method. The probabilistic problems involved in parameter transfer process and the influence of concrete meso-model on parameter transfer process are still to be determined further research.