混凝土微裂纹受单向拉伸应力作用的弹脆性静力破坏分析

Elastic_Brittle Fracture Analysis of Micro_Crackin Concrete Loaded by Stretching Stresses

混凝土是典型的受拉脆性材料，内部微裂纹的受荷扩展破坏是土木工程界十分关心的问题。本文采用裂纹线附近分析方法，从平衡方程和混凝土材料的破坏准则出发，对混凝土内受单向拉伸的Ｉ型微裂纹进行弹脆性静力破坏分析，得出了单向拉伸应力大小与微裂纹脆断长度之间的关系。

The concrete is a typical brittle material.The fracture and propagating failure of the micro-crack in loaded concrete are very important problem in civil engineering.In this paper,from the equilibrium differential equations and failure criterion,the elastic-brittle static fracture analysis of the plane stress micro-crack in concrete loaded by stretching stresses was done near crack line.The relations between the stretching stresses and the length of brittle fracture zone on the crack line were obtained.