混凝土单轴直接拉伸应力-应变全曲线试验方法

Review on the Test Methods of Stress-Strain Curves of Concrete in Direct Tensile Tests

在参阅国内外大量文献资料的基础上,对混凝土单轴直接拉伸应力-应变全曲线的试验条件进行了评述,对拉伸应力-应变全曲线不同试验方法的优缺点进行了分析.

Based on the available literature, the experimental condition on obtaining softening response of concrete in direct tension are discussed. The characteristics of different test method are compared. It shows that the stress distribution on testing sample is very important. The notched specimens commonly used can induce the concentration of tensile stress in concrete specimen and affect the testing result significantly, and the type of sample supporter affects also, which will result in the imperfection of stress distribution homogeneously. The paper pointed out that it is necessary to find a standard method to test the softening response of direct tension of concrete, then the result obtained by various studies can be comparable.