摘要
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 conception of shape parameters, the yield function of the modified Cam-clay model is modified. The secondary development in FLAC3D is made. Some conclusions are drawn as follows. Firstly, the yield function generalizes that of the modified Cam-clay model. Secondly, it is very important that the shape parameters correctly predict characteristics of soils. More exact values can be obtained when suitable shape parameters are applied in the model than those in the modified Cam-clay model, namely, the problem that the values gained by the modified Cam-clay moded are larger than those of examinations is solved. Thirdly, through comparison of the results of the inherent modified Cam-clay model in FLAC^3D and the proposed model with shape parameters, the validity and rationality of the secondary development is validated to some extent. Finally, it extends the application range of FLAC^3D in the field of geotechnical numerical simulation, and may present references for the secondary development of other geotechnical constitutive models.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2009年第1期26-31,共6页
Chinese Journal of Geotechnical Engineering
基金
山东科技大学春蕾计划(2008BWZ002)
