基于CT图像的界面强度对混凝土力学性能影响

发布时间：2018-05-17 09:18

本文选题：界面强度 + CT图像　；参考：《混凝土》2017年10期

【摘要】：基于CT扫描数据,运用图像处理方法获取各相的形状与分布。矢量化后在有限元软件中建立了骨料、砂浆、界面和初始孔洞的更加接近真实细观结构的混凝土四相模型。应用该模型模拟了在假定的各个不同界面强度下其对混凝土整体力学性能的影响。研究表明,建立的四相细观模型下,界面强度的提高增大了混凝土整体的极限抗拉强度及下降段强度,特别是对下降度强度的影响。并且在中低强度混凝土中这种影响更加明显。
[Abstract]:Based on CT scan data, the shape and distribution of each phase are obtained by image processing. After vectorization, a concrete four-phase model of aggregate, mortar, interface and initial pore is established in the finite element software, which is closer to the real meso-structure. The model is used to simulate the effect of different interface strength on the mechanical properties of concrete. The results show that the increase of interfacial strength increases the ultimate tensile strength and the descending strength of the whole concrete under the four-phase meso-model, especially the influence on the descending strength. And this effect is more obvious in medium and low strength concrete.
【作者单位】：西北农林科技大学水利与建筑工程学院;
【基金】：十三五国家重点研发计划(2016YFC0400203) 国家自然科学基金(51379178)
【分类号】：TU528

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