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水的力学作用和化学物理作用的交错影响,使得坝基软岩软化和受力更为复杂,也使一般固体线弹性本构模型不再适用。该文介绍了饱和体抗拉试验,对试验结果进行拟合,用试验验证了本构曲线受拉区的合理性。构建了复杂应力状态下饱和体本构模型,实现了复杂应力饱和体计算的有限元算法,并验证了算法的可行性和收敛性。根据新构建的本构模型和算法,给出了相应的三维有限元计算程序,其计算算例的结果验证了本构模型的合理性和算法的正确性。
The interlacing effect of water mechanics and chemical physics makes the softening and stress of soft rock in the dam more complicated, and makes the general solid linear elastic constitutive model no longer applicable. In this paper, the saturated body tensile test is introduced and the test results are fitted. The rationality of the tension zone of the constitutive curve is verified by experiments. The saturated body constitutive model under complex stress state is constructed, the finite element method of complex stress saturated body calculation is realized, and the feasibility and convergence of the algorithm are verified. According to the newly constructed constitutive model and algorithm, the corresponding three-dimensional finite element program is given. The results of calculation example verify the rationality of the constitutive model and the correctness of the algorithm.