混凝土CT图像的3维重建技术

利用三维图像处理软件MIMICS对原始的CT图像进行预处理，对混凝上的真实细观结构进行了三维重建，并导入大型商业有限元软件ANSYS中，建立了更能准确表征混凝上细观非均质性的三维有限元数值模型，从而弥补了传统随机混凝土骨料模型的不足。利用重建的三维有限元数值模型进行了混凝土破损过程的细观数值模拟，并与其他有限元模型的分析结果进行了比较，验证了模型的合理性。通过建立的接近实际的混凝土细观三维有限元数值模型，可对混凝土材料的细观破损过程进行了深入的探索。

Research on Three-dimension Reconstruction Technology of Concrete Based on CT Images

In order to build real 3-D meso-concrete model to analyze the damage-fracture mechanism, CT images were pretreated in the MIMICS software of 3-D digital image processing, concrete real meso-level structure was reconstructed, and the data were imported the ANSYS, thus the 3-D finite element numerical model was constructed, which could be used to describe the meso heterogeneity of concrete. On the basis of the results, the meso finite element model was numerically simulated. By comparing the simulation results with other finite model analyzing results, it was shown that the concrete of 3-D reconstruction model could overcome the shortage of traditional random aggregate model and actually reflected mechanics properties of concrete.