软硬互层状岩体局部区域的细观非均匀特性研究
发布时间：2019-07-10 15:20
【摘要】：以锦屏工程地下厂房区典型软硬互层状岩体为研究对象,基于区域生长算法的图像分割技术表征岩体局部区域的细观结构特征,探讨获取区域生长算法中生长参数的方法;采用FLAC~(3D)差分程序,以比例关系映射方法建立与软硬互层状岩体岩样相对应的细观尺度均匀化网格模型。在此基础上,实现各组分基元力学参数满足Weibull分布的细观概率模型。并以程序内嵌的fish语言,实现考虑岩体局部细观结构及组分材料非均匀性时基元的弹 脆 塑性本构关系,建立互层状岩体局部区域细观数值模型,进而以多种数值模拟方案考察细观非均匀性对岩体力学行为的影响。结果表明,软硬互层状岩体的细观非均匀特性对其变形特性、强度特征、声发射规律及累计损伤过程影响显著。
[Abstract]:Taking the typical soft and hard interlayered rock mass in Jinping project underground powerhouse area as the research object, the meso-structure characteristics of the local area of rock mass are characterized by image segmentation technique based on regional growth algorithm, and the method of obtaining the growth parameters in the regional growth algorithm is discussed, and the meso-scale homogenized grid model corresponding to the rock sample of soft-hard interlayered rock mass is established by using FLAC~ (3D) difference program and proportional relation mapping method. On this basis, the meso-probability model in which the mechanical parameters of each component element satisfies Weibull distribution is realized. Based on the fish language embedded in the program, the elastic-brittle plastic constitutive relation considering the local meso-structure of rock mass and the inhomogeneity of component materials is realized, and the meso-numerical model of local area of interlayered rock mass is established, and then the influence of meso-inhomogeneity on the mechanical behavior of rock mass is investigated by various numerical simulation schemes. The results show that the meso-inhomogeneous characteristics of soft-hard interlayered rock mass have significant effects on its deformation characteristics, strength characteristics, acoustic emission law and cumulative damage process.
【作者单位】： 河海大学港口海岸与近海工程学院;河海大学力学与材料学院;
【基金】：国家自然科学基金资助项目(41672257,51679081) 中央高校基本科研业务费(2016B00614)~~
【分类号】：TU45
本文编号：2512686
[Abstract]:Taking the typical soft and hard interlayered rock mass in Jinping project underground powerhouse area as the research object, the meso-structure characteristics of the local area of rock mass are characterized by image segmentation technique based on regional growth algorithm, and the method of obtaining the growth parameters in the regional growth algorithm is discussed, and the meso-scale homogenized grid model corresponding to the rock sample of soft-hard interlayered rock mass is established by using FLAC~ (3D) difference program and proportional relation mapping method. On this basis, the meso-probability model in which the mechanical parameters of each component element satisfies Weibull distribution is realized. Based on the fish language embedded in the program, the elastic-brittle plastic constitutive relation considering the local meso-structure of rock mass and the inhomogeneity of component materials is realized, and the meso-numerical model of local area of interlayered rock mass is established, and then the influence of meso-inhomogeneity on the mechanical behavior of rock mass is investigated by various numerical simulation schemes. The results show that the meso-inhomogeneous characteristics of soft-hard interlayered rock mass have significant effects on its deformation characteristics, strength characteristics, acoustic emission law and cumulative damage process.
【作者单位】： 河海大学港口海岸与近海工程学院;河海大学力学与材料学院;
【基金】：国家自然科学基金资助项目(41672257,51679081) 中央高校基本科研业务费(2016B00614)~~
【分类号】：TU45
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