本文对混凝土力学行为的两个方面进行了探讨:首先,从亚微观角度提出了混凝土在单轴向压力下破坏过程的概念模型.在此基础上,利用概率理论给出了宏观全应力-应雯行为的数学模型.试验结果表明,理论上给出的表迭式与实际曲线符合得较好.其次,根据理想材料的破坏方式,以能量比的方法定义了能够描述混凝土破坏方式的脆性指标. This article discusses two aspects of the mechanical behavior of concrete: First, a conceptual model of the failure process of concrete under uniaxial pressure is proposed from a sub-microscopic perspective. Based on this, a macroscopic full stress-problem is given using probability theory. Wen’s mathematical model. Experimental results show that the theoretically presented superposition and the actual curve are in good agreement. Second, according to the destruction of the ideal material, the energy ratio method is used to define the brittleness index that can describe the concrete failure mode. .