本文运用连续介质损伤力学的基本方法分析混凝土在高应力下的非线性徐变,根据混凝土徐变过程中内部微裂缝的细观分析,建立了徐变损伤演变方程,同时得到弹性徐变耦合损伤后的非线性徐变本构方程,用所得到的方程分析了在低于长期强度的应力作用下的长期徐变和应力水平高于长期强度时的徐变破坏,计算的结果和一维非线性徐变实验数据符合得较好。 In this paper, the nonlinear creep of concrete under high stress is analyzed using the basic method of continuum damage mechanics. According to the mesoscopic analysis of the internal microcracks in concrete creep, the creep damage evolution equation is established and the elastic creep coupling damage is obtained. After the nonlinear creep constitutive equation, using the obtained equation, the analysis of the long-term creep under the stress below the long-term strength and the creep damage when the stress level is higher than the long-term strength, the calculation results and the one-dimensional non- The linear creep experimental data are in good agreement.