摘要
为解决土体剪切试验数值模拟较困难的问题,基于数值流形法(NMM)和不连续分析法(DDA)耦合算法(NMM-DDA)的计算特点,提出通过分离单元的形式来模拟土体的剪切破坏过程。对长沙市某地红粘土直剪试验进行模拟计算,并与试验结果及DDA计算结果进行对比分析。结果表明,所提方法在抗剪强度、破坏形态方面与试验结果有较好的可比性,且较DDA更好地反映了土体逐渐破坏的特点,说明该方法所反映的土体局部化过程符合实际,为今后研究提供了参考依据。
In order to solve the numerical simulation problem of soil mass shear test, separating element is proposed to simulate the process of soil destroy based on NMM-DDA. This method is applied to simulating the direct shear test of red clay in Changsha. Comparison of the results with NMM-DDA, DDA and test, it shows that this method can simulate the process of direct shear test well and embody the progressive failure of soil better than DDA. It demonstrates that the results of this method are truthfulness, and provides the evidence for further study.
出处
《水电能源科学》
北大核心
2014年第7期101-104,共4页
Water Resources and Power
