【摘要】：根據(jù)從材料結(jié)構(gòu)到性能機(jī)理再到工程應(yīng)用的研究過(guò)程,從細(xì)觀模型、退化過(guò)程以及多尺度方法3個(gè)方面,對(duì)近些年細(xì)觀尺度上的橋梁混凝土結(jié)構(gòu)耐久性的國(guó)內(nèi)外研究進(jìn)行了簡(jiǎn)要綜述。分析結(jié)果表明:在細(xì)觀模型方面,已經(jīng)發(fā)展出基于真實(shí)骨料參數(shù)的骨料模型,代表了當(dāng)前該領(lǐng)域研究的最高水平;傳統(tǒng)的骨料模型由于較高的模擬效率仍具有一定的應(yīng)用價(jià)值;在退化過(guò)程方面,針對(duì)單一退化機(jī)理的研究已經(jīng)比較成熟,而耐久性能與力學(xué)性能退化的耦合效應(yīng)還有待進(jìn)一步研究;針對(duì)多尺度方法的研究不僅有效提高了細(xì)觀尺度上的模擬效率,同時(shí)也建立了細(xì)觀尺度與工程尺度之間的聯(lián)系;參數(shù)傳遞是多尺度方法中的一種基本手段,參數(shù)傳遞過(guò)程中所涉及的概率性問(wèn)題以及混凝土細(xì)觀模型對(duì)參數(shù)傳遞過(guò)程的影響仍有待進(jìn)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.
【作者單位】： 同濟(jì)大學(xué)橋梁工程系;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51378383)
【分類號(hào)】：U441
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本文編號(hào)：2293672