基于细观尺度的桥梁混凝土结构耐久性研究新进展
发布时间：2018-10-25 12:16
【摘要】：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。
[Abstract]:According to the research process from material structure to performance mechanism to engineering application, there are three aspects: mesoscopic model, degradation process and multi-scale method. The domestic and foreign studies on the durability of bridge concrete structures on meso scale in recent years are briefly reviewed. The results show that the aggregate model based on real aggregate parameters has been developed in the meso model, which represents the highest level of research in this field, and the traditional aggregate model still has some application value because of its high simulation efficiency. In the degradation process, the study on the single degradation mechanism has been mature, but the coupling effect between durability and mechanical performance degradation needs to be further studied. The study of multi-scale method not only improves the efficiency of mesoscale simulation, but also establishes the relationship between mesoscale and engineering scale. The probabilistic problems involved in the process of parameter transfer and the influence of concrete meso model on the process of parameter transfer still need to be further studied.
【作者单位】： 同济大学桥梁工程系;
【基金】：国家自然科学基金项目(51378383)
【分类号】：U441
，
本文编号：2293672
[Abstract]:According to the research process from material structure to performance mechanism to engineering application, there are three aspects: mesoscopic model, degradation process and multi-scale method. The domestic and foreign studies on the durability of bridge concrete structures on meso scale in recent years are briefly reviewed. The results show that the aggregate model based on real aggregate parameters has been developed in the meso model, which represents the highest level of research in this field, and the traditional aggregate model still has some application value because of its high simulation efficiency. In the degradation process, the study on the single degradation mechanism has been mature, but the coupling effect between durability and mechanical performance degradation needs to be further studied. The study of multi-scale method not only improves the efficiency of mesoscale simulation, but also establishes the relationship between mesoscale and engineering scale. The probabilistic problems involved in the process of parameter transfer and the influence of concrete meso model on the process of parameter transfer still need to be further studied.
【作者单位】： 同济大学桥梁工程系;
【基金】：国家自然科学基金项目(51378383)
【分类号】：U441
，
本文编号：2293672
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