摘要
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 paper deals with two aspects of concrete mechanical behavior: 1.From the point of view of meso-structure,the authors put forward a concept model for the failure process of concrete under uniaxial compression.Based on the theory of probability,then they propose a mathematical model of complete stress-strain macroscopic relationship.The expesrimental results show that the the- oretical expression can conform to the experimental curve well. 2.According to the failure manner of ideal materials,the brittleness index which can be used to characterize the fracture process and manner of any material, such as concrete,is defined and calculated in terms of energy ratio.
关键词
混凝土
力学性能
单轴向压力
complete stress-strain curve
concept model
mathematical
model
energy ratio
brittleness index
regression
