对混凝土内部微裂缝的形成机理及其控制因素进行了较为系统的分析讨论，并对混凝土单轴受力时非线性力学性能作了初步的探讨，提出混凝土的细现缺陷的形成机理及其宏观非线性力学性能的研究将对混凝土结构设计理论和方法产生深远影响。 The formation mechanism and controlling factors of internal microcracks in concrete are systematically analyzed and discussed. The nonlinear mechanical properties of concrete under uniaxial stress are preliminarily discussed. The forming mechanism and macro The study of nonlinear mechanical properties will have a profound impact on the theory and method of concrete structure design.