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基于形状参数概念对修正剑桥模型的屈服面进行修正,并在FLAC3D中进行二次开发,得出如下结论:本屈服面是对修正剑桥模型的屈服面的进一步推广;针对不同土体采用通过试验得到的形状参数的合理取值,可得到比采用修正剑桥模型更为精确的预测值,解决了采用修正剑桥模型进行分析得到的土体强度比通过试验所得到的值偏大的问题;对比分析形状参数R取2与FLAC3D中固有修正剑桥模型所得到的计算结果,在一定程度上验证了二次开发所得模型的正确性与合理性;扩大FLAC3D在土木数值分析中的应用范围,也为开发其它土工模型提供借鉴与参考。
Based on the concept of shape parameter, the yield surface of the modified Cambridge model was corrected and the secondary development was carried out in FLAC3D. The conclusion was drawn as follows: The yield surface is a further extension of the yield surface of the modified Cambridge model; The reasonable value of the shape parameters obtained can obtain more accurate prediction values than the modified Cambridge model and solve the problem that the strength of the soil obtained by the modified Cambridge model is larger than the value obtained by the experiment; comparative analysis The results obtained from the modified Cambridge model with the shape parameters R and FLAC3D, to a certain extent, verify the correctness and rationality of the model obtained from the secondary development. The application of FLAC3D in the numerical analysis of civil engineering is also expanded. Other geotechnical models provide reference and reference.