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基于特殊设计的混凝土试件单轴压缩破坏试验,结合高分辨率CMOS采集到的逐级加载过程中的变形图像,采用数字图像相关方法(Digital Image Correlation,以下简称DIC方法),应用由MATLAB和C++语言混合编程的开放式二维数字图像相关方法计算平台,研究分析了混凝土试件表面受力变形直至破坏全过程位移场分布、特点,计算获得了较为准确的试件裂纹表面形态、长度、位置等数字化的基本裂纹信息,为进一步直接、准确地建立混凝土试件或构件的裂纹有限元分析模型,以及进一步研究混凝土结构的破坏特征和断裂机理有着重要的意义和价值。
Based on the uniaxial compression failure test of specially designed concrete specimens and the deformation images acquired by high-resolution CMOS in the step-by-step loading process, a digital image correlation method (DIC method) C + + language hybrid programming open two-dimensional digital image correlation computing platform, the analysis of the concrete specimen deformation until the entire displacement of the displacement field distribution, characteristics, calculated to obtain a more accurate specimen surface morphology, length, Location and other digital information of the basic crack, in order to further directly and accurately establish the finite element analysis model of concrete specimens or components crack, as well as further study of the destruction characteristics of concrete structures and fracture mechanism has important significance and value.