【摘要】 从结构破坏的尺寸效应入手,利用纤维束强度理论,得到了材料的宏观统计力学效应。并以土力学强度试验中广泛应用的小尺寸、中尺寸和原位大尺寸抗剪强度试验为基础,对某土体强度进行了统计分析和蒙特卡洛模拟,统计结果揭示了土体强度的统计尺寸效应。研究认为,岩土体不同尺寸试样试验具有不同的强度值,按纤维束强度理论解释较为吻合;当试件尺寸大于中尺寸后,强度参数趋于稳定,其试样的强度代表性更好。更多还原

【Abstract】 Based on the size effect of structure fracture and the strength theory of fabric bundles, the macro statistical scaling effect of materials is achieved. Three scale types of soil strength tests, small, middle and big sizes, extensively existing in engineering practices are made. By means of statistical analysis, the data indicate the statistical scale effect of soil strength. The Monte Carlo method is used for simulating statistical features of soil strength in small, middle and big sizes and proves the statistical scale effect of soil strength.更多还原